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Publications (18)
Phosphorus/nitrogen co-doped reduced graphene oxide (PN-rGO) materials have been prepared by one-step pyrolysis of the functionalized GO (FGO) with hexachlorocyclotriphosphazene and p-phenylenediamine. The resulting PN-rGO shows a porous structure with a transparent and wrinkled thin film morphology. Compared with undoped rGO, the electrochemical m...
In atomic force microscopy (AFM) there has been an existing void in ascribing chemical identity to features. Fourier transform infrared (FTIR) and UV–Visible spectroscopy are powerful means to chemically identify functional groups and to assess sample molecule conformations and chemical environments. However, limited by the diffraction of light, na...
We report here the synthesis of binderless and template-less three-dimensional (3D) pinecone-shaped Pt/TiO2/Ti mesh structure. The TiO2 hydrothermally synthesized onto Ti mesh is composed of a mixture of flower-like nanorods and vertically aligned bar-shaped structures, whereas Pt film grown by pulsed laser deposition displays a smooth surface. XRD...
Rapid, mass diagnosis of the coronavirus disease 2019 (COVID-19) is critical to stop the ongoing infection spread. The two standard screening methods to confirm the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are polymerase chain reaction (PCR), through the RNA of the virus, and serology by detecting antibodies produced as a respon...
Mixed-reactant microfluidic membraneless fuel cells are promising power sources for future electronic portable applications due to their simplified construction and operation. In order to develop a better performing mixed-reactant fuel cell, the improvement of elements such as selective catalysts and optimization of electrode-microchannel arrangeme...
By combining the hydrothermal and pulsed laser deposition methods, several three‐dimensional Pt catalysts on TiO2 structures are prepared and used for the electro‐oxidation of ethanol in acidic medium. SEM reveals that TiO2 prepared with 0.6 M of HCl consist of a mixture of nanowires and nanorods. For higher HCl concentrations, the TiO2 are either...
Zn-air battery is of great interest in rechargeable batteries due to its low cost, environment-friendly and theoretically high energy density which is about 1086 Wh kg ⁻¹ [1]. The activity and durability of cathode are the bottleneck of the battery performance, which attribute to the sluggish kinetics of the oxygen reduction reaction (ORR) during d...
An inorganic microfluidic fuel cell (i-μFFC) was integrated in a glucose sensor LOC device. This device was constructed by using a mini CNC and evaluated for energy harvesting from glucose. The i-μFFC with PLD electrodes exhibits the highest performance compared to the i-μFFC with spray electrodes microfluidic fuel cell for the three conditions, ob...
Microfluidic direct ethanol fuel cells are a promising technology for powering electronic portable devices in the future, and the use of efficient electrocatalysts, both anodic and cathodic are crucial for the development of this type of fuel cells. In this work, an Ag-Pt ethanol-tolerant cathode, synthesized by pulsed laser deposition is studied i...
Mixed-reactant microfluidic direct methanol fuel cells (MR-μDMFCs) have the feature of achieving higher volumetric energy density in comparison with other DMFCs. The main challenge for the development of MR-μDMFC arises from the need for selective electrocatalysts, especially for the oxygen reduction reaction (ORR). In the present work, we report t...
In the present work, we report the design, fabrication and evaluation of a membraneless mixed-reactant and air-breathing microfluidic direct methanol fuel cell (ML-μDMFC) stack operated in passive mode. The operation under mixed-reactant conditions was achieved by using a highly methanol-tolerant Ag/Pt/CP cathode with ultra-low Pt loading in alkali...
The fabrication and evaluation of a passive, air-breathing, membraneless microfluidic direct methanol fuel cell (ML-μDMFC) using a methanol-tolerant Ag/Pt/CP cathode is presented here. We previously proposed that due to its high tolerance to methanol and the good activity towards the oxygen reduction reaction in alkaline medium, this catalyst could...
In the present work, we report the synthesis by pulsed laser deposition technique of binder-free platinum layer coated with silver layer, with each layer having a thickness of about 25 nm. The resulting Pt/Ag material exhibits clear electrocatalytic activity for oxygen reduction reaction (ORR) in alkaline solution. More interestingly, it shows no a...
In the present work, we report an ethanol tolerant cathode catalyst developed through a two-stages electrodeposition of Pt and Ag nanoparticles on a glassy carbon electrode using chronoamperometric and voltammetric techniques. The resulting nanoparticles were characterized by Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), X-Ray Photoe...
In the present work, a methanol tolerant cathode catalyst was developed through the electrodeposition of bimetallic nanoparticles PtAg on a glassy carbon electrode using potentiostatic and voltammetric techniques. The resulting particles were characterized by Scanning Electron Microscopy (SEM) and electrochemical techniques. According to the SEM st...
Los avances en ciencia y tecnología han permitido modificar materiales por medio de la acción de agentes biológicos, con el objetivo de proporcionar todo lo necesario para el desarrollo de la vida. En medio de todos estos desarrollos surge la biotecnología ambiental como un área de la biotecnología que emplea organismos o parte de ellos, para obten...
