Chunming Wang

Lanzhou University, Kao-lan-hsien, Gansu Sheng, China

Are you Chunming Wang?

Claim your profile

Publications (125)467.18 Total impact

  • Xin Li · Yimin Jiang · Lingpu Jia · Chunming Wang
    [Show abstract] [Hide abstract]
    ABSTRACT: Hydrogen evolution reaction (HER) through low-cost and earth-abundant electrocatalysts at low overpotentials is a crucial project to clean energy. Molybdenum dioxide/reduced graphene oxide/polyimide-carbon nanotube (MoO2/RGO/PI-CNT) film was synthesized by a simple electrodeposition method as an efficient catalyst for HER. MoO2 nanoparticles with a small size of 10-20 nm uniformly disperse on the RGO surface. The large quantity and small size of MoO2 nanoparticles afford large surface area for HER, greatly enhancing the electrocatalytic performance of MoO2/RGO/PI-CNT film. The HER electrocatalytic property of MoO2/RGO/PI-CNT film in acidic solution is evaluated by linear sweep voltammetry (LSV). MoO2/RGO/PI-CNT film exhibit a high electrocatalytic activity for HER at a small onset overpotential (-110 mV vs RHE) with a high current density (10.0 mA cm-2) and a good stability. The low Tafel slope (68 mV dec-1) reveals the Volmer-Heyrovsky mechanism for HER. The comparison between MoO2/RGO/PI-CNT film and other catalysts indicate that the MoO2/RGO/PI-CNT film had a great performance for HER. This work presents a new thought for the synthesis of MoO2/RGO/PI-CNT film as an efficient HER electrocatalyst.
    No preview · Article · Feb 2016
  • [Show abstract] [Hide abstract]
    ABSTRACT: Palladium-cobalt alloy nanoparticles were synthesized and dispersed on carbon black support, aiming to have a less expensive catalyst. Catalytic behaviors of PdCo/C catalyst for the oxidation of hydroquinone (HQ) with H2O2 in aqueous solution were evaluated using high performance liquid chromatography (HPLC). The results revealed that PdCo/C catalyst had better catalytic activity than an equal amount of commercial Pd/C and Co/C catalysts due to the d-band hybridization between Pd and Co. The effects of pH value, solvent and various interferents including inorganic and organic compounds on the efficiency of HQ oxidation were further investigated. Furthermore, based on mixed potential theory, comprehensive electrochemical measurements like open circuit potential-time (OCP-t) technique and Tafel plot were efficient to assess the catalytic activity of the catalyst, and the results obtained were consistent with those of HPLC measurements. The efficient HQ oxidation was closely associated with the catalytic activity of PdCo nanoparticles because they accelerated the electron-transfer process and facilitated the generation of OH radicals.
    No preview · Article · Jan 2016 · ACS Applied Materials & Interfaces
  • [Show abstract] [Hide abstract]
    ABSTRACT: A facile, environmentally friendly route is demonstrated for the synthesis of Pt-Au dendrimer-like nanoparticles on the surface of polydopamine (PDA)-wrapped reduced graphene oxide (RGO), in which Pt-Au alloy nanoparticles are synthesized by the reduction of H2PtCl6 and HAuCl4 with ascorbic acid. The effects of support material and chemical composition on the catalytic activity for the reduction of 4-nitrophenol (4-NP) are investigated in detail. Pt nanoparticles supported on PDA/RGO (Pt-PDA/RGO) exhibit significantly higher catalytic activity as compared to those exhibited by Pt nanoparticles deposited on pristine graphene sheets (Pt-RGO) and commercial Pt/C catalyst. Furthermore, the chemical composition seriously affects the catalytic ability of the catalysts. With Pt-to-Au molar ratios of 3/1 and 1/1, significantly enhanced catalytic activities are observed, outperforming the support decorated with each single constituent. The high activity of Pt-Au-PDA/RGO can be explained by electronic effect involving in two types of electron transfers: (1) from the PDA coating to both Au and Pt atoms; (2) from Au to Pt atoms. Moreover, the Pt3Au1-PDA/RGO composite keeps a stable conversion efficiency of around 100% over six successive reduction reaction cycles. Through an experimental device of "filtering and catalyzing," the Pt3Au1- PDA/RGO sample exhibits superior efficiency for the purification of water containing 4-NP. Within 8s, the water becomes colorless.
    No preview · Article · Jan 2016
  • Weichun Ye · Jiajia Fu · Qin Wang · Chunming Wang · Desheng Xue
    [Show abstract] [Hide abstract]
    ABSTRACT: NiCoP alloy nanoparticles supported on reduced graphene oxide (NiCoP/RGO) are synthesized by in situ co-reduction of Ni2+, Co2+ and graphene oxide (GO) with sodium hypophosphite in a one-pot reaction. This synthesis route is simple and can be used for industrial preparation. The different molar ratios of Ni/Co can be obtained by changing the molar ratio of their salts in the reaction bath. The effect of annealing temperature on the crystal structure of NiCoP alloys has been further investigated. After 500 °C annealing, NiCoP alloys exhibit good crystallinity. The as-prepared NiCoP/RGO composites demonstrate high dielectric constant and magnetic loss in the frequency range of 2-18 GHz due to the conductive and ferromagnetic behavior. Also, their coercivity and magnetization strength are decreased from magnetic measurement with the increase of Ni content. As the molar ratio of Ni/Co is 3:1, the maximum value of the reflection loss reaches to -17.84 dB. Furthermore, the NiCoP/RGO composites have better corrosion resistance than traditional iron series magnetic nanoparticles. It is expected that the composites with the thin, light-weighted and broadband absorbing and good anti-corrosion properties will have a great potential for electromagnetic wave absorption applications.
    No preview · Article · Dec 2015 · Journal of Magnetism and Magnetic Materials
  • [Show abstract] [Hide abstract]
    ABSTRACT: A promising Pt@Te nanoparticles catalyst has been synthesized on the surface of the reduced graphene oxide/polyimide (rGO/PI) substrate. First of all, Te was deposited on the rGO/PI using electrochemical deposition method to obtain Te-rGO/PI that has various morphologies. Secondly, a monolayer Pb film was deposited on the Te-rGO/PI by the similar electrochemical method to get a transition state material of Pb@Te-rGO/PI. Finally, the target Pt@Te catalyst on the rGO/PI with large surface area was obtained by a chemical oxidation method, in which Pb was stripped off from the Pb@Te-rGO/PI by an oxygenation of H2PtCl6, while the oxygenation process, Pt replaced Pb to be deposited on the surface of Te-rGO/PI to form Pt@Te-rGO/PI. Then the prepared Pt@Te-rGO/PI was used as a working electrode to study the hydrogen evolution behavior in 0.5 mol/l H2SO4. By comparison the catalyst of sole Pt-rGO/PI nanoparticles, Pt@Te-rGO/PI catalyst considerably abated the demanding of Pt. And it shows excellent HER activities with a low overpotential of 0.1 V. The Tafel slope of 55 mV dec−1 reveals most likely the Volmer–Heyrovsky mechanism for hydrogen evolution reaction (HER). On the other hand, the catalyst displays satisfactory stability. This work may pave a potential pathway for synthesizing multi-morphology nano-Pt catalyst with high surface area for application in the study of HER.
    No preview · Article · Oct 2015 · International Journal of Hydrogen Energy
  • Qin Wang · Yan Zhang · Weichun Ye · Chunming Wang
    [Show abstract] [Hide abstract]
    ABSTRACT: A nonenzymatic glucose sensor was constructed by electrodepositing molybdenum sulfide (MoSx)-nickel (II) hydroxide (Ni(OH)2) in sequence on a flexible carbon nanotube/polyimide (CNT/PI) composite membrane. The sensing material was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The electrocatalytic activity of the as-prepared nanomaterial toward glucose oxidation was investigated by cyclic voltammetry and amperometric measurement. The Ni(OH)2/MoSx/CNT/PI sensor demonstrated excellent properties including a wide linear range from 10 to 1600 μM of glucose, rapid response (<3 s), low detection limit of 5.4 μM, good selectivity, good repeatability, and long-term stability (2 weeks). The superior performances were attributed to the pronounced synergistic effect between Ni(OH)2 and MoSx. Furthermore, the excellent sensor was successfully applied to detect glucose in human blood serum samples by standard addition method with satisfactory recovery.
    No preview · Article · Aug 2015 · Journal of Solid State Electrochemistry
  • Xiaohong Xia · Xuan Shen · Xiaojuan Zhao · Weichun Ye · Chunming Wang
    [Show abstract] [Hide abstract]
    ABSTRACT: Dendritic MoO3/Ag with good crystallinity has been prepared through an operando method. In the hydrogen evolution reaction (HER), this catalyst, which was designed to utilize the best properties of each component material, showed a high catalytic activity. After the precursor was drop-cast onto a glassy carbon electrode, a reductive potential was applied to the coated electrode, and H2 evolution occurred within the range of potentials. The overpotential required to evolve H2 at the benchmark rate decreased progressively with subsequent voltammetric cycles, until a steady state was reached at which only 145 mV of overpotential was required to pass −10 mA cm−2 of current density. During the electrocatalysis, the precursor was converted to catalyst through an operando method. This operando-synthesized MoO3/Ag catalyst has a low Tafel slope (43 mV dec−1), low overpotential (145 mV), and excellent durability for HER. It has the potential to be a promising material for HER.
    No preview · Article · Jul 2015 · ChemCatChem
  • [Show abstract] [Hide abstract]
    ABSTRACT: The bimetallic alloy CuAu nanoparticles (NPs) can produce more photogenerated electrons when compared with single metal Au NPs. Moreover, graphene (Gr) sheets can help the charge separation and slow down the recombination of the electron hole pairs of ZnO. Hence, a novel graphene-based bimetallic alloy-semiconductor catalyst: CuAu–ZnO–Gr nanocomposite is synthesized. Due to the synergistic effect among CuAu NPs, ZnO nanopyramids, and Gr sheets, CuAu–ZnO–Gr behaves an enhanced photocatalytic activity for the photocatalytic degradation of synthetic colorants methyl orange (MO), methylene blue (MB), indigotin (IN), sunset yellow (SY), and tartrazine (TT) under the simulated sunlight irradiation. Furthermore, the apparent rate constants (kapp) of MO, MB, IN, SY, and TT degradation are estimated respectively. In addition, the as-prepared CuAu–ZnO–Gr nanocomposite is characterized by X-ray diffraction, UV–vis spectrum, transmission electron microscopy, energy dispersive X-ray analysis (EDX), and EDX mapping. As a result of the facile synthesis route and the enhanced photocatalytic activity, this new material CuAu–ZnO–Gr can be a promising photocatalyst for the degradation of dyes.
    No preview · Article · Jul 2015 · Journal of Alloys and Compounds
  • [Show abstract] [Hide abstract]
    ABSTRACT: Transition-metal dichalcogenide (TMD) monolayer alloys are a branch of two-dimensional (2D) materials which can have large-range band gap tuning as the composition changes. Synthesis of 2D TMD monolayer alloys with controlled composition as well as controlled domain size and edge structure is of great challenge. In the present work, we report growth of MoS2(1-x)Se2x monolayer alloys (x = 0.41 - 1.00) with controlled morphology and large domain size using physical vapor deposition (PVD). MoS2(1-x)Se2x monolayer alloys with different edge orientations (Mo-zigzag and S/Se-zigzag edge orientations) have been obtained by controlling the deposition temperature. Large domain size of MoS2(1-x)Se2x monolayer alloys (x = 0.41 - 1.00) up to 20 μm have been obtained by tuning the temperature gradient in the deposition zone. Together with previously obtained MoS2(1-x)Se2x monolayer alloys (x = 0 - 0.40), the band gap photoluminescence (PL) is continuously tuned from 1.86 eV (i.e., 665 nm, reached at x = 0.00) to 1.55 eV (i.e., 800 nm, reached at x = 1.00). Additionally, Raman peak splitting was observed in MoS2(1-x)Se2x monolayer alloys. This work provide a way to synthesize MoS2(1-x)Se2x monolayer alloys with different edge orientations, which could be benefit to controlled growth of other 2D materials.
    No preview · Article · Jun 2015 · ACS Nano
  • Shengjiao Yu · Aihua Zhang · Chunming Wang
    [Show abstract] [Hide abstract]
    ABSTRACT: Two kinds of dendritic Te crystals were successfully prepared by electrodepositing TeO2 in pH = 3, 8 and 11 solutions respectively. The parameter of pH played an important role in growth rate. Moreover, the nucleation of Te in pH = 3 and 8 solutions were conformed to progressive type while in pH = 11 solution was conformed to instantaneous type. By systematically studying the morphologies evolution of Te crystals with different deposition times in pH = 3, 8 and 11 solutions, the structure of crystal was confirmed directly decided by nucleation type. Base on this, a growth mechanism for two kinds of dendritic crystals was proposed. Moreover, this mechanism may provide a reference for predicting the morphology of Te crystals in electrodeposition process.
    No preview · Article · May 2015 · Journal of The Electrochemical Society
  • Yimin Jiang · Xin Li · Shengjiao Yu · Lingpu Jia · Xiaojuan Zhao · Chunming Wang
    [Show abstract] [Hide abstract]
    ABSTRACT: Efficient evolution of hydrogen through electrocatalysis at low overpotentials holds tremendous promise for clean energy. Herein, a highly active and stable MoS2 electrocatalyst is supported on reduced graphene oxide-modified carbon nanotube/polyimide (PI/CNT-RGO) film for hydrogen evolution reaction (HER). The PI/CNT-RGO film allows the intimate growth of MoS2 nanoparticles on its surface. The nanosize and high dispersion of MoS2 nanoparticles provide a vast amount of available edge sites and the coupling of RGO and MoS2 enhances the electron transfer between the edge sites and the substrate, greatly improving the HER activity of PI/CNT-RGO-MoS2 film. The MoS2 with a smaller loading less than 0.04 mg cm−2 on the PI/CNT-RGO film exhibits excellent HER activities with a low overpotential of 0.09 V and large current densities, as well as good stability. The Tafel slope of 61 mV dec−1 reveals the Volmer–Heyrovsky mechanism for HER. Thus, this work paves a potential pathway for designing efficient MoS2-based electrocatalysts for HER.
    No preview · Article · Mar 2015 · Advanced Functional Materials
  • [Show abstract] [Hide abstract]
    ABSTRACT: Based on the excellent properties of dopamine (reduction, self-polymerization and adhesion), we designed a one-step and environment-friendly reduction route to synthesize and simultaneously functionalize polydopamine (PDA)-Ag-reduced graphene oxide (RGO) hybrid. The obtained PDA-Ag-RGO hybrid was characterized by transmission electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, FT-IR and UV-vis analysis. Silver nanoparticles were uniformly dispersed on the surface of RGO sheets and coated with a thin PDA film. The hybrid exhibited good dispersivity in polar solvents (water and acetonitrile). Compared with Ag-RGO hybrid prepared via NaBH4 reduction and commercial Pd/C catalyst, PDA-Ag-RGO hybrid had better catalytic activity for the oxidation of hydroquinone to benzoquinone in the presence of H2O2. Moreover, the hybrid still retained superior catalytic activity over multiple cycles.
    No preview · Article · Nov 2014 · Applied Catalysis B Environmental
  • [Show abstract] [Hide abstract]
    ABSTRACT: We proposed a facile approach for the synthesis of zinc sulfur-coated poly (3,4-ethylenedioxythiophene)-reduced graphene oxide hybrids film (ZnS-PEDOT-rGO) by using thioacetamide (TAA) as the reducing agent. The ZnS-PEDOT-rGO hybrids film modified glassy carbon-rotating disk electrode (GC-RDE) was then developed for the sensitive simultaneous determination of three deoxyribonucleic acid (DNA) bases: guanine (G), adenine (A), and thymine (T). By cyclic voltammetry (CV), this electrochemical sensor showed a good photoelectronic effect, and the peak currents of G, A, and T increased obviously. Some kinetic parameters were estimated by linear sweep voltammetry (LSV). Under the optimal conditions, the magnified anodic peak currents represented the excellent analytical performance of simultaneous detection of G, A, and T in a wide linear range and low detection limit. This proposed method also has been successfully applied to the assessment of G, A, and T contents in real-life samples, such as herring sperm DNA samples, milk powder and urine sample from human beings, with satisfactory results. The obtained results were also compared to HPLC of analysis for those three DNA bases and no significant differences were found. By the treatment of the experimental data, the electrochemical reaction mechanisms of G, A, and T all involved a two-electron-two-proton-transfer process.
    No preview · Article · Nov 2014 · Sensors and Actuators B Chemical
  • [Show abstract] [Hide abstract]
    ABSTRACT: The Au-SnO2/graphenes (GNs)-single-walled carbon nanotubes (SWCNTs) nanocomposite has been prepared through green chemistry methods. This composite material was deliberately designed to combinethe virtues of metal, semiconductor, and carbon materials. Its successful formation has been confirmedby a series of characterizations, such as transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). A new electrode based on this nanocomposite was fabricated and used as a voltammetric sensor for detection of 2-tert- butylhydroquinone (TBHQ) through cyclic voltammetry (CV) and differential pulse voltammetry(DPV) methods. Under optimized conditions, this electrode presents a linear response in a broad concentration range of 5.0 x 10(-8) to 2.3 x 10(-4) M of TBHQ, with its detection limit reaching 5.8 x 10(-8) M. Thissimultaneous broad-range and ultrasensitive detecting capability for TBHQ is, to our best knowledge, better than all the previously reported modified electrodes. The excellent performance is attributed tothe synergistic effects among the constituent nanomaterials (GNs, SWCNTs, SnO2, and Au) and the uniquenanoarchitecture of this nanocomposite. c 2014 Elsevier B. V. All rights reserved.
    No preview · Article · Nov 2014 · Sensors and Actuators B Chemical
  • Xiaojuan Zhao · xiaohong Xia · Shengjiao Yu · Chunming Wang
    [Show abstract] [Hide abstract]
    ABSTRACT: A novel honokiol electrochemical sensor based on MoS2/graphene nanohybrid was introduced in this work. The hybrid was characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy and X-ray photoelectron spectroscopy. The electrochemical behavior of honokiol on the MoS2/graphene modified glassy carbon electrode was investigated in pH 5.5 phosphate buffer solution by cyclic voltammetry and differential pulse voltammetry. Compared with bare glassy carbon electrode, the proposed electrode showed improved analytical performance characteristics in catalytic redox of honokiol. Under the optimal conditions, the modified electrode showed a linear voltammetric response to the honokiol with a concentration range from1.0×10−9 to 2.5×10-6 mol L-1, and the detection limit (S/N=3) was estimulated at 6.2×10-10 mol L-1. Moreover, the sensor also exhibited good reproducibility and stability, and could be used for the detection of honokiol in pharmaceutical samples.
    No preview · Article · Oct 2014 · Analytical methods
  • Xiaohong Xia · Xiaojuan Zhao · Weichun Ye · Chunming Wang
    [Show abstract] [Hide abstract]
    ABSTRACT: Porous structured Ag-Ag2S/MoS2 composite was synthesized by a facile chemical etching method and tested with respect to its application in hydrogen evolution reaction (HER). Extensive spectroscopic and electrochemical characterizations were performed to investigate the origin of the catalytic activity of this Ag-Ag2S/MoS2 composite and understand the property of this material for HER. During the synthesis process, cysteine (Cys) was used to improve the number of highly catalytic S edges as revealed by a low ratio of Mo to S. The high density of active sites that result from the rough and porous structure surface morphology also contributes to the highly catalytic activity. The catalytic activity for HER increases with the change of material morphology from a relatively complete lamellar structure to the porous structure. The electrochemical stability tests indicate that the catalyst remains highly active throughout prolonged operation. Our enhanced understanding of this highly active hydrogen evolution catalyst may facilitate the development of economical electrochemical hydrogen production systems. (C) 2014 Published by Elsevier Ltd.
    No preview · Article · Oct 2014 · Electrochimica Acta
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: A simple and effective approach was demonstrated to synthesize flowerlike Pt nanocrystals on polydopamine (PDA) functionalized reduced oxide graphene (RGO). In-spired by mussels, the PDA/RGO composites were obtained via the reduction of GO nanosheets by dopamine, followed by simultaneous capping by PDA. Then, the synthesis of Pt flowerlike nanocrystals assembled with small elongated nanoparticles on PDA/RGO (Pt(F)-PDA/RGO) was carried out by mixing H2PtCl6 with PDA/RGO in the presence of ascorbic acid under boiling. PDA as a surface-adherent and multifunctional biopolymer played a dual role: dispersing stable RGO into aqueous solution and providing functional groups to bind metal ions and metal nanoparticles. The as-prepared Pt(F)-PDA/RGO catalyst showed considerably improved catalytic activity and stability toward methanol electrooxidation, compared with Pt nanoclusters on PDA/RGO (Pt(C)-PDA/RGO) and Pt nanoparticles on pristine graphene sheets (Pt/RGO). The kinetic characterization of Pt(F)-PDA/RGO was further discussed by cyclic voltammetry. This simple and green approach could be applicable to other metallic nanocrystals as a novel platform in catalysis, fuel cells and biosensors. (C) 2014 The Authors. Published by Elsevier Ltd.
    Full-text · Article · Oct 2014 · Electrochimica Acta
  • Source
    Lingpu Jia · Shengjiao Yu · Yimin Jiang · Chunming Wang
    [Show abstract] [Hide abstract]
    ABSTRACT: Diluted magnetic semiconductor ZnMnSe2 has been synthesized on reduced graphene oxide/polyimide (rGO/PI) substrate by a simple electrochemical method. The structure, surface morphology, magnetism and photoelectric property of ZnMnSe2 were examined. For comparison, ZnSe and MnSe were also prepared by electrochemical deposition. Porous structure of ZnMnSe2 was obtained, and the porous structure was consisted of nanosheets. The atomic ratio of Zn, Mn and Se was measured to be 1:1:2 by X-ray photoelectron spectra and energy-dispersive X-ray spectroscopy. The high resolution transmission electron microscopy and X-ray Powder Diffraction pattern confirmed the preferred crystal growth orientation was the (111) direction. The absorption spectrum provided a band gap of 2.4 eV. Open-circuit potential measurement indicated that ZnMnSe2 composite film was a good p-type semiconductor material. The photoelectrical phenomena of ZnSe, MnSe and ZnMnSe2 were observed, and the optoelectronic property of ZnMnSe2 was the best, the potential difference was 0.27 V. Besides, the ZnMnSe2 composite film had prominent magnetism, and it was ferromagnetism material. These results indicated that rGO/PI-ZnMnSe2 composite film by electrochemical deposition was a promising ferromagnetism semiconductor.
    Preview · Article · Oct 2014 · Journal of Alloys and Compounds
  • Lingpu Jia · Xiao Sun · Yimin Jiang · Shenjiao Yu · Chunming Wang
    [Show abstract] [Hide abstract]
    ABSTRACT: Promising catalytic activity of MoSe2 in the hydrogen evolution reaction (HER) is synthesized on a new reduced graphene oxide/polyimide (rGO/PI) substrate by a simple electrochemical method. The MoSe2 nanoparticles have excellent photo-responsive properties; the potential difference could reach 0.45 V with the photo-responsive time just 0.6 s. Furthermore, MoSe2 thin film exhibits superior catalytic activity in the hydrogen evolution reaction (HER). It has a greater cathode current at more positive potential compared to other MoSe2 and MoS2, and the efficiency of H2 evolution is strongly influenced by illumination; this suggests that MoSe2 composite film has good photoelectrocatalysis properties for hydrogen evolution. Besides, both dark and illumination MoSe2 films exhibit extremely high stability in acidic solution as the HER catalytic activity shows no degradation after 100 cycles for two hours. All results indicate that MoSe2–rGO/PI composite film has potential to be a better catalyst for HER.
    No preview · Article · Sep 2014 · Advanced Functional Materials
  • [Show abstract] [Hide abstract]
    ABSTRACT: Platinum nanoparticles were synthesized with molybdenum disulfide (MoS2) as a template through a facile hydrothermal method. The as-prepared nanocomposites (Pt-MoS2) were characterized by TEM, HRTEM, electrochemical impedance spectroscopy, and X-ray photoelectron spectroscopy, and they were then used to fabricate a biosensor for enzyme-like catalysis of hydrogen peroxide (H2O2). The electrochemical activity for the reduction reactions of H2O2 was evaluated in N2-saturated phosphate buffer solution. The cyclic voltammetry and amperometry results demonstrated that the biosensor modified by the nanocomposites exhibited a fast amperometric response and excellent electrocatalytic activity for reduction of H2O2 with a wide linear range from 0.004 to 48.5 mM and a low detection limit of 0.001 mM at 3σ. Thus, the present work indicates that Pt nanoparticles can be synthesized on the surface of few-layer MoS2 owing to interfacial PtS bonds and that the composites show a clear enhancement in the catalytic activity relative to that of the platinum nanoparticles alone. This method provides a new way to prepare metal nanoparticles for extensive applications in the field of catalysis.
    No preview · Article · Jul 2014 · ChemCatChem