Jian-Jun Wang

Shandong University | SDU · Institute for Crystal Materials

Gel electrolytes have emerged as a promising solution for enhancing the performance of zinc‐ion batteries (ZIBs), particularly in flexible devices. However, they face challenges such as low‐temperature inefficiency, constrained ionic conductivity, and poor mechanical strength. To address these issues, this study presents a novel PAMCD gel electroly...

An in-depth understanding of electrocatalytic mechanisms is essential for advancing electrocatalysts for the oxygen evolution reaction (OER). The emerging oxide pathway mechanism (OPM) streamlines direct O–O radical coupling, circumventing the formation of oxygen vacancy defects characteristic of the lattice oxygen mechanism (LOM) and bypassing add...

Copper sulfides (CuxS, 1 ≤ x ≤ 2) are notable for their unique photoelectric properties and potential applications, particularly in photo/electrocatalysis. These materials are valued for their tunable band gap, near‐infrared optical characteristics, and plasmonic resonance effects. However, challenges such as low catalytic activity and limited stab...

Photoelectrochemical (PEC) water splitting is pivotal for addressing the clean and renewable energy demands. However, developing low‐cost, efficient, and robust non‐precious metal catalysts for the acidic oxygen evolution reaction (OER) remains a significant challenge. In this study, we introduced Ce to modulate the electronic structure of Co3O4, e...

The photoelectrochemical (PEC) conversion of organic small molecules offers a dual benefit of synthesizing value-added chemicals and concurrently producing hydrogen (H2). Ethylene glycol, with its dual hydroxyl groups, stands out as a versatile organic substrate capable of yielding various C1 and C2 chemicals. In this study, we demonstrate that pH...

Photoelectrochemical (PEC) water splitting offers a promising route for harnessing solar energy to produce clean hydrogen fuel sustainably. A major hurdle has been boosting the performance of photoanode materials within acidic electrolytes—a critical aspect for advancing PEC technology. In response to this challenge, we report a method to augment t...

The photoelectrochemical (PEC) conversion of organic small molecules offers a dual benefit of synthesizing value-added chemicals and concurrently producing hydrogen (H2). Ethylene glycol, with its dual hydroxyl groups, stands out as a versatile organic substrate capable of yielding various C1 and C2 chemicals. In this study, we demonstrate that pH...

Rechargeable aqueous zinc-ion batteries offer significant potential for applications in flexible electronics and stationary energy storage grids. However, their development is impeded by interfacial instability, leading to deleterious side reactions and dendritic zinc growth. Here, we introduce a novel solution by employing zincophilic cucurbit[7]u...

Transition metal alloys have emerged as promising electrocatalysts due to their ability to modulate key parameters, such as d-band electron filling, Fermi level energy, and interatomic spacing, thereby influencing their affinity towards reaction intermediates. However, the structural stability of alloy electrocatalysts during the alkaline hydrogen...

Regulating the electronic structure of active sites and monitoring the evolution of the active component is essential to improve the intrinsic activity of catalysts for electrochemical reactions. Herein, a highly efficient pre‐electrocatalyst of iron diselenide with rich Se vacancies achieved by phosphorus doping (denoted as P‐FeSe2) for oxygen evo...

The breakthrough of energy storage technology will enable energy distribution and adaptation across space‐time, which is revolutionary for the generation of energy. Optimizing the energy storage performance of polymer dielectrics remains challenging via the physical process of electrical breakdown in solid dielectrics is hard to be intuitively obta...

The great promise of the combination of urea oxidation reaction (UOR) with hydrogen evolution reaction (HER) to simultaneously achieve wastewater treatment and hydrogen production calls for the rational design of high‐performance electrocatalysts. Herein, the reconstruction with the formation of Ni 2 P and Mo 2 O 7 ²⁻ on the surface can largely enh...

Specific medications to combat cerebellar ataxias, a group of debilitating movement disorders characterized by difficulty with walking, balance and coordination, are still lacking. Notably, cerebellar microglial activation appears to be a common feature in different types of ataxic patients and rodent models. However, direct evidence that cerebella...

The recent advancement of nanocatalysis offers great promise for cancer therapy, and the development of efficient nanozymes for catalytic biological reactions is highly desirable, but still challenging. Herein, we report the synthesis of ultra-small FeOx nanozymes which is enabled by the introduction of Cu²⁺. The obtained nanozymes exhibit versatil...

Urea electrocatalytic oxidation afforded by renewable energies is highly promising to replace the sluggish oxygen evolution reaction in water splitting for hydrogen production while realizing the treatment of urea-rich waste water. Therefore, the development of efficient and cost-effective catalysts for water splitting assisted by urea is highly de...

Ir-based materials are still the benchmark catalysts for various reactions in acidic environment, but the high loading and low atom utilization limit their large-scale deployment. Herein, we report an effective strategy for implanting fully dispersed iridium-oxide atomic clusters onto hematite for boosting photoelectrochemical water oxidation in ac...

The in-situ reconstruction of electrocatalysts with the changes in crystal structure and composition is a universal process, enabling the modulation of active sites for high catalytic performance. Therefore, tracking the...

Turbulent interfacial evolution at the Zn anode/electrolyte, leading to rampant dendrites and parasitic reactions, is responsible for low Coulombic efficiency (CE) and premature failure in Zn metal batteries. To address...

The development of highly efficient and stable photoelectrode materials is of significant importance for the conversion of solar energy into chemical fuels. Herein, a novel Ni@NiO/BiVO4 photoanode is designed and prepared for efficient water splitting by the deposition of Ni particles on the surface of BiVO4 with subsequent thermal treatment. The i...

Rational design and constructing earth-abundant electrocatalysts for efficient electrocatalytic water splitting is a crucial challenge. Herein, we report a simple and efficient one-step electrochemical synthetic route of the NiFe2O4@FeOOH composite electrocatalyst for the oxygen evolution reaction. The unique morphology of the NiFe2O4 nanoflowers l...

In this work, Gd³⁺ ionic nano-aggregate clusters were introduced into metallo-polyelectrolytes to balance the conflicts between high mechanical robustness and X-ray attenuation of flexible shielding materials. The segmented polyurethanes (PUs) containing main-chain bisferrocene and pendant sulfonates in hard segments is applied as a macromolecular...

The strong alkaline electrolytes are utilized in various key electrochemical applications and the severe corrosion by hydroxyl ions endows the development of high‐performance electrode materials with a great challenge. Here, an effective strategy is demonstrated to stabilize α‐Co(OH)2 under harsh alkaline electrochemical condition by coordination p...

The intrinsic zinc dendrite growth aggravated by the uneven electric field at the Zn anode surface and the water‐induced parasitic reactions have largely impeded rechargeable aqueous zinc‐ion batteries for the practical applications in large‐scale energy storage. Here, an effective strategy is proposed to manipulate Zn deposition and simultaneously...

The classical motor center cerebellum is one of the most consistent structures of abnormality in autism spectrum disorders (ASD), and neuropeptide oxytocin is increasingly explored as a potential pharmacotherapy for ASD. However, whether oxytocin targets the cerebellum for therapeutic effects remains unclear. Here, we report a localization of oxyto...

Background: Lymph node skip metastases are common in lung, breast, and thyroid cancer patients, but are rare in colon cancer patients. Specifically, lymph node skip metastases occur in 1%-3% of colon cancer patients. Previous reports have demonstrated colon cancer skip metastases involving the retropancreatic and portocaval lymph nodes and Virchow...

Developing highly efficient and stable electrocatalysts for oxygen evolution reaction is of significant importance for applications in energy conversion and storage. Modulation of electronic structure of catalysts is critical for improving the performance of the resulting electrodes. Here, we report a facile way to engineer the electronic structure...

Optical second harmonic generation is a second-order nonlinear process by which two photons of a given frequency can combine in a nonlinear medium to generate a third photon at twice the frequency. Since the electric-dipole SHG process only occurs in non-centrosymmetric crystals, it is widely used as a sensitive probe to detect broken inversion sym...

The inherent drawbacks of severe charge recombination and poor conductivity of hematite (α-Fe2O3) are still the obstacles for its applications. Herein, we report the integration of NiSe2 nanoparticles on the surface of Fe2O3 films for the photoelectrochemical (PEC) water oxidation. The resulting heterostructure photoanode exhibited significantly en...

Clear vertical variations in phytoplankton community structure are usually observed in deep-water lakes and reservoirs, which is one of the key components of water quality and ecosystem functioning. However, the vertical patterns and ecological drivers of phytoplankton communities in deep-water lakes and reservoirs are still understudied. In this s...

Betahistine and gastrodin are the first-line medications for vestibular disorders in clinical practice, nevertheless, their amelioration effects on vestibular dysfunctions still lack direct comparison and their unexpected extra-vestibular effects remain elusive. Recent clinical studies have indicated that both of them may have effects on the gastro...

This article summarizes the background, specific conditions, main measures, steps and effects of the implementation of Mass Drug Administration (MDA) to control the local P. vivax malaria epidemic in Anhui Province in central China. Distributing medicines to the designated population quickly controlled the local epidemic of P. vivax. Implementing M...

Bacterial cellulose (BC) is well known as a high-performance dietary fiber. This study investigates the adsorption capacity of BC for cholesterol, sodium cholate, unsaturated oil, and heavy metal ions in vitro. Further, a hyperlipidemia mouse model was constructed to investigate the effects of BC on lipid metabolism, antioxidant levels, and intesti...

Vestibular compensation is an important model for developing the prevention and intervention strategies of vestibular disorders, and investigating the plasticity of the adult central nervous system induced by peripheral injury. Medial vestibular nucleus (MVN) in brainstem is critical center for vestibular compensation. Its neuronal excitability and...

Development of efficient and inexpensive electrocatalysts for hydrogen production via water electrolysis is of great significance. Up to date, the oxygen evolution reaction (OER) is still the efficiency limiting step for overall water splitting. Here, we report a highly efficient bifunctional electrocatalyst of 3D Ni0.9Fe0.1S:Pi nanoflower arrays f...

The durability of electrocatalysts is comparably as important as the efficiency for practical applications. Transition metal sulfides usually undergo phase evolution during the oxygen evolution reaction (OER), making the resulting electrocatalysts unstable. Here we report the synthesis of Co doping (Ni, Fe)1+xS (denoted as FeCoNiS), and that its de...

The electronic structure of active sites is of importance for catalysts to achieve an optimized interaction with the intermediates. In this study, a unique organic-inorganic hybrid oxygen evolution reaction (OER) electrocatalyst composed of electrochemically inactive conducting polyaniline (PANI) and non-precious Fe-based oxide Fe3O4 is presented....

In order to evaluate impact of traffic flow after the common main stem road accidents and take corresponding measures to reduce traffic congestion, this paper evaluates and analyzes the impact of traffic flow after the common main stem road accidents. The proportion of occupied roads, the duration, traffic saturation and traffic composition are sel...

Solid-state refrigeration which is environmentally benign has attracted considerable attention. Mechanocaloric (mC) materials, in which the phase transitions can be induced by mechanical stresses, represent one of the most promising types of solid-state caloric materials. Herein, we have developed a thermodynamic phenomenological model and predicte...

Polymer dielectrics are encouraging contenders for high-density energy storage applications. The energy density of a polymer dielectric depends on the breakdown strength and dielectric constant. However, a polymer dielectric with a high breakdown strength usually has a low dielectric constant, or vice versa. Therefore, it is critical to perform mic...

A high-power monolithic continuous wave (CW) Yb doped fiber amplifier at 1064 nm has been demonstrated based on traditional large mode area step-index fiber, which generated 5.07 kW narrow line-width laser with near diffraction-limited beam quality. At the maximal output power, >35dB OSNR has been achieved with line-width being 370pm, and the measu...

The development of efficient and stable electrocatalysts to speed up the sluggish kinetics of water splitting has long been being the frontier of energy conversion research. Herein, we report a highly efficient electrocatalyst of P-Ni0.75Fe0.25Se2 prepared on nickel foam for overall water splitting. The optimal P-Ni0.75Fe0.25Se2 electrode exhibits...

There remains a challenge in designing electrocatalysts for water oxidation to create highly efficient catalytic sites for the oxygen evolution reaction (OER) while maintaining their robustness at large outputs. Herein, an etching-assisted synthesis approach was developed to integrate highly active NiFe2O4 nanoparticles with a robust and active NiO...

The electronic structure of active sites is critically important for electrochemical reactions. Here, the authors report a facile approach to independently regulate the electronic structure of Fe in Ni0.75Fe0.25Se2 by P doping. The resulting electrode exhibits superior catalytic performance for the oxygen evolution reaction (OER) showing a low over...

Cobalt-chromium-molybdenum alloy (CoCrMo) and ceramic are the two most common materials for the femoral head in hip joint prostheses, and the acetabular liner is typically made from ultra-high molecular weight polyethylene (UHMWPE), highly cross-linked polyethylene (XLPE), or highly cross-linked polyethylene blended with Vitamin E (VEXLPE). The sel...

In article number 2100320, Jian‐Jun Wang, Artur Braun, and co‐workers demonstrate that the formation of covalent S—O bonds between Cu2S and Fe2O3 can significantly improve the performance of the Cu2S/Fe2O3 heterojunction photoelectrode for photoelectrochemical water splitting owning to the enhanced charge separation and transfer, and reduced charge...

Quantitative stable isotope probing (qSIP) is a powerful tool, which links microbial taxon with functional metabolism in ecosystems and quantitatively determines the metabolic activity or growth rate of individual microbial taxa exposed to isotope tracers in the environment. qSIP technique employs quantitative PCR, high-throughput sequencing and st...

The severe charge recombination and the sluggish kinetic for oxygen evolution reaction have largely limited the application of hematite (α‐Fe2O3) for water splitting. Herein, the construction of Cu2S/Fe2O3 heterojunction and discover that the formation of covalent SO bonds between Cu2S and Fe2O3 can significantly improve the photoelectrochemical pe...

Background: the wear of tibial insert is still one of primary factors leading to failure of total knee arthroplasty (TKA). Dodecyl gallate (DG) has shown improvements in the oxidation stability of highly cross-linked polyethylene (HXLPE). This study aimed to assess the application of HXLPE supplemented with DG (HXLPE-DG) on the tibial insert in TK...

Heat removal has become an increasingly crucial issue for microelectronic chips due to increasingly high speed and high performance. One solution is to increase the thermal conductivity of the corresponding dielectrics. However, traditional approach to adding solid heat conductive nanoparticles to polymer dielectrics led to a significant weight inc...

Polymer dielectrics are highly desirable in capacitor applications due to their low cost, high breakdown strength, and unique self‐healing capability. However, existing polymer dielectrics suffer from either a low energy density or a high dielectric loss, thereby hindering the development of compact, efficient, and reliable power electronics. Here,...

The development of low cost and high‐efficiency electrocatalysts for the oxygen evolution reaction (OER) is essential for a number of applications in the field of energy conversion and storage. Herein, we present an efficient OER electrocatalyst in the form of thin (Fe,Ni) 9 S 8 nanosheets (FNS NSs) anchored on a three‐dimensional (3D) conductive s...

Objective: To investigate the clinicopathological characteristics and prognosis of incidental prostate cancer (PCa). Methods: We retrospectively analyzed the clinical data and pathological characteristics of 96 cases of incidental PCa in 580 patients undergoing radical cystectomy and followed them up for prognosis. Results: The incidence rate...

Acomposite photocatalyst, with branch-like BiOI/Bi2WO6 heterojunction deposited on the polyacrylonitrile micro/nano composite fiber(PAN MNCF), was prepared via two step hydrothermal method. The products are characterized by X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), photoluminescence(PL) spectra, UV-Vis diffuse reflection spectr...

Rechargeable aqueous zinc-ion batteries (ZIBs) are promising portable and large-scale grid energy storage devices, as they are safe and economical. However, developing suitable ZIB cathode materials with excellent cycling performance characteristics remains a challenging task. Here, ammonium heptavanadate (NH4)2V7O16·3.2H2O (NHVO) nanosquares with...

The discovery of superconductivity in twisted graphene bilayers with a magic twisting angle ≈1.1° has opened up a wide range of potential twistronic device possibilities. In this work, the twisting effects in spintronic devices are explored. In particular, a material prototype integrating spintronics, straintronics, and twistronics is developed by...

Background Previous studies have shown that miR-100-5p expression is abnormal in prostate cancer. However, the role and regulatory mechanism of miR-100-5p requires further investigation. Thus, the aim of this study was to observe the effects of miR-100-5p on the proliferation, migration and invasion of prostate cancer (PCa) cells and to explore the...