منابع مشابه
Low Platinum Loading Catalysts for Fuel Cells
Objectives • Further improve the new catalyst consisting of a submonolayer of Pt on carbon-supported Ru nanoparticles (1%Pt/10%Ru/C) to come close to the DOE’s 2010 target of 100 μg/cm2 noble metal loading. • Further elucidate the inhibition mechanism of CO on H2 oxidation on Pt. • Reduce Ru loadings in Pt-Ru electrocatalysts. • Explore monolayer-level-supported Pt electrocatalysts for O2 reduc...
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This paper discusses the mechanisms of surface area loss of supported platinum (Pt) electrocatalysts in lowtemperature fuel cells. It is argued that submonolayer dissolution of Pt nanoparticles governs the surface area loss at high voltages by increasing the loss of Pt from carbon and coarsening of Pt nanoparticles on carbon.
متن کاملDissolution of Platinum in the Operational Range of Fuel Cells
One of the most important practical issues in low-temperature fuel-cell catalyst degradation is platinum dissolution. According to the literature, it initiates at 0.6-0.9 VRHE, whereas previous time- and potential-resolved inductively coupled plasma mass spectrometry (ICP-MS) experiments, however, revealed dissolution onset at only 1.05 VRHE. In this manuscript, the apparent discrepancy is addr...
متن کاملBetter than platinum? Fuel cells energized by enzymes.
D ihydrogen (H2) gas has the potential to be a limitless source of clean energy if simple and efficient methods of production and utilization can be developed. In that regard, using H2 to store electrical energy by means of an electrochemical cell and returning that energy by means of a fuel cell would be among the cleanest and most efficient energy methodologies. This electrochemical apparatus...
متن کاملThe Effect of Platinum Electrocatalyst on Membrane Degradation in Polymer Electrolyte Fuel Cells
Membrane degradation is a severe factor limiting the lifetime of polymer electrolyte fuel cells. Therefore, obtaining a deeper knowledge is fundamental in order to establish fuel cells as competitive product. A segmented single cell was operated under open circuit voltage with alternating relative humidity. The influence of the catalyst layer on membrane degradation was evaluated by measuring a...
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ژورنال
عنوان ژورنال: Materials Today
سال: 2002
ISSN: 1369-7021
DOI: 10.1016/s1369-7021(02)00618-1