Highly Efficient Oxygen Electrode Obtained by Sequential Deposition of Transition Metal-Platinum Alloys on Graphene Nanoplatelets.

A set of platinum (Pt) and earth-abundant transition metals (M = Ni, Fe, Cu) on graphene nanoplatelets (sqPtM/GNPs) was synthesised via sequential deposition to establish parallels between the synthesis method and the materials' electrochemical properties. sqPtM/GNPs were assessed as bifunctional electrocatalysts for oxygen evolution (OER) and reduction (ORR) reactions for application in unitised regenerative fuel cells and metal-air batteries. sqPtFe/GNPs showed the highest catalytic performance with a low potential difference of ORR half-wave potential and overpotential at 10 mA cm during OER, a crucial parameter for bifunctional electrocatalysts benchmarking.

Alumina supported copper oxide nanoparticles (CuO/AlO) as high-performance electrocatalysts for hydrazine oxidation reaction.

Direct hydrazine liquid fuel cell (DHFC) is perceived as effectual energy generating mean owing to high conversion efficiency and energy density. However, the development of well-designed, cost effective and high performance electrocatalysts is the paramount to establish DHFCs as efficient energy generating technology. Herein, gamma alumina supported copper oxide nanocatalysts (CuO/AlO) are synthesized via impregnation method and investigated for their electrocatalytic potential towards hydrazine oxidation reaction.

Preparation of different thin film catalysts by direct current magnetron sputtering for hydrogen generation.

In this study, thin films of Co, Ni, Pd, and Pt were prepared on Co O support material in pellet form using the direct current (DC) magnetron sputtering method for use as catalysts for hydrogen generation from NaBH .Characterization of the catalysts was carried out using X-ray diffraction (XRD), scanning electronic microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). According to cross-sectional SEM images, catalyst thicknesses were observed in the range of approximately 115.

Water management improvement in PEM fuel cells via addition of PDMS or APTES polymers to the catalyst layer.

Water management is one of the obstacles in the development and commercialization of proton exchange membrane fuel cells (PEMFCs). Sufficient humidification of the membrane directly affects the PEM fuel cell performance. Therefore, 2 different hydrophobic polymers, polydimethylsiloxane (PDMS) and (3-Aminopropyl) triethoxysilane (APTES), were tested at different percentages (5, 10, and 20 wt.

Evaluation of Low and High Surface Area TiO₂ and Al₂O₃ Metal Oxides-Carbon Hybrids in Terms of Polymer Electrolyte Membrane Fuel Cell Catalyst Support.

Support materials are of great interest in order to improve the activity and stability of the polymer electrolyte membrane fuel cell (PEMFC) catalysts. Metal oxides have been reported as promising support materials due to their excellent mechanical resistance and high stability against corrosion emerging at acidic and oxidative environment. In this study, high (250 m₂/g) and low (45 m₂/g) surface area mesoporous TiO₂ and high (220 m₂/g) and low (30 m₂/g) surface area mesoporous Al₂O₃ were investigated as an alternate cathode catalyst support materials for PEMFCs.