Electrooxidation of hydrogen is a "structure insensitive" reaction on platinum and a "structure sensitive" reaction on palladium. For bimetallic catalysts, curves of activity as a function of the composition of the catalyst can exhibit a maximum. Yet, metal loading can alter the atomic composition ...
Consequently, the standard protocol does not provide the intrinsic kinetic values of the ORR on platinum, nor does it predict the performance of a given catalyst in a fuel cell, as illustrated in Fig. 1: For fundamental analysis, one needs to obtain the curve of the intrinsic kinetics, ...
Challenges in Fuel Cell Technology Hydrogen fuel cells consist of two electrodes: an anode and a cathode, with an electrolyte between them. Pt serves as a fundamental catalyst in low-temperature fuel cells, such as alkaline fuel cells and polymer electrolyte fuel cells (PEFCs). Pt has a high...
Best new movies to stream on Netflix, Hulu, Prime Video, Max (HBO), and more Now we learn of another breakthrough: Scientists have devised a new hydrogen catalyst that uses a graphene-based process that out-performs the much more expensive platinum-based catalysts used today. “This initi...
respectively. All potentials in this study were referenced to the reversible hydrogen electrode (RHE) for each test. The catalyst underwent activation using cyclic voltammetry (scan rates of 250 mV s–1and potential ranges of 0.05–1.05 V vs. RHE) until achieving a stable curve. Linear...
catalyst degradationelectrochemistrygas diffusion electrodesNafionPt dissolutionPt dissolution has already been intensively studied in aqueous model systems and many mechanistic insights have been gained. Nevertheless, transfer of new knowledge to real-world fuel cell systems is still a significant challenge. ...
Overall, Pt/SiO2 is the most suitable catalyst for HDO of m-cresols, despite losing its selectivity towards toluene over time. Table 2. Pt-based catalysts. Catalyst Empty CellProductsCommentsRef Anisole Pt/HbetaPt/SiO2Hbeta Temperature: 400 °CCarrier Gas: HydrogenGas flow: H2/Anisole 50%...
Sign in Hydrogen spillover on a carbon supported platinum fuel cell catalyst: a computational and inelastic neutron scattering study Studies in Surface Science and Catalysis Volume 138,2001, Pages 55-60 Purchase options CorporateFor R&D professionals working in corporate organizations. ...
Researchers have devised a platinum and cobalt alloy to act as a catalyst in the next generation of hydrogen fuel cells, slashing the amount of rare and..
“We’re already laying the groundwork for recovering rare raw materials like platinum. Our estimates suggest that by 2030 at the latest, appreciable numbers of fuel cells will need recycling,” he adds. Platinum acts as a catalyst in thefuel cell, accelerating the reaction of hydrogen and oxy...