Publications by authors named "Vineesh Thazhe Veettil"
Herein, we report a Ru-rich anode catalyst for alkaline exchange membrane fuel cells. The fuel cell with such a RuPdIr/C anode and Ag-based cathode attained a peak power density close to 1 W cm-2 with only 0.2 mg cm-2 anode precious group metal loading, reaching the highest mass activity reported for this technology.
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- Phosphorene, a two-dimensional nanomaterial, shows potential for improving electrocatalytic activity in oxygen evolution reactions (OER) but requires controlled synthesis of few-layered structures for better performance.
- A new method for creating phosphorene quantum dots (PQDs) through a single-step electrochemical exfoliation allows for in situ surface functionalization, enhancing their electrocatalytic activity.
- Functionalized phosphorene quantum dots (FPQDs) demonstrate efficient OER performance with low overpotential and Tafel slope, while exhibiting stronger electron transfer kinetics, making them promising materials for water-splitting devices.
Article Synopsis
- Graphene and hydrogen fuel technologies are ready for advanced applications, but pure graphene lacks the necessary activity for hydrogen evolution reactions (HER).
- Researchers enhance graphene's catalytic activity by creating van der Waals (vdW) heterostructures with hexagonal boron nitride (hBN), utilizing specific stacking patterns and sequences to improve HER performance.
- The development of these heterostructures has been validated through experiments with defect-free materials and advanced modeling techniques, leading to the identification of active sites for efficient HER.
Metal nanowires exhibit unusually high catalytic activity towards oxygen reduction reaction (ORR) due to their inherent electronic structures. However, controllable synthesis of stable nanowires still remains as a daunting challenge. Herein, we report the in situ synthesis of silver nanowires (AgNWs) over boron doped graphene sheets (BG) and demonstrated its efficient electrocatalytic activity towards ORR for the first time.
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- * A newly proposed strategy focuses on creating porous, low-density Ni-Co alloys, specifically Ni1Co2, which demonstrate excellent performance in oxygen evolution with low overpotential and high stability, comparable to conventional catalysts like IrO2.
- * Incorporating graphene into the synthesis of these catalysts results in a material (Ni-NG) with exceptional hydrogen evolution activity, leading to a water electrolysis cell that shows high stability and current density, paving the way for innovative, lightweight energy solutions.
Herein we report the electrocatalytic activity of boron-doped graphene for the reduction of CO2. Electrolysis takes place at low overpotentials leading exclusively to formate as the product (vis-à-vis benchmark Bi catalyst). Computational studies reveal mechanistic details of CO2 adsorption and subsequent conversion to formic acid/formate.
View Article and Find Full Text PDFTechnical advancement in the field of ultra-small sensors and devices demands the development of novel micro- or nano-based architectures. Here we report the design and assembly of cross-linked three dimensional graphene nanoribbons (3D GNRs) using solution based covalent binding of individual 2D GNRs and demonstrate its electrochemical application as a 3D electrode. The enhanced performance of 3D GNRs over individual 2D GNRs is established using standard redox probes--[Ru(NH3)6](3+/2+), [Fe(CN)6](3-/4-) and important bio-analytes--dopamine and ascorbic acid.
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