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首页> 外文期刊>Carbon: An International Journal Sponsored by the American Carbon Society >Enhancing the catalytic performance of Pt/G catalysts using steam-etched carbon blacks as a catalyst support
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Enhancing the catalytic performance of Pt/G catalysts using steam-etched carbon blacks as a catalyst support

机译：使用蒸汽蚀刻炭黑作为催化剂载体提高Pt / G催化剂的催化性能

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摘要

XC72 carbon blacks were treated using a steam-etching technique. Pt catalysts using steam-etched carbon blacks (SECBs) as supports were developed for oxygen reduction reactions in polymer electrolyte fuel cells (PEFCs). The use of the steam-etched carbon blacks as a catalyst support can improve the dispersion uniformity of Pt nanoparticles on the surface of the support and can decrease the Pt particle size, as indicated by transmission electron microscopy (TEM) data. The overall catalytic performance of the catalysts using SECBs was better than that of the catalysts using non-SECBs. The mass activity of the Pt catalysts using SECBs etched for 1 h had the best catalytic performance for both the catalysts using SECBs and those using non-SECBs. In addition, the electrochemically active surface area of the Pt/SECBs significantly increased after etching. TEM results revealed that the center of the carbon black was more easily etched than the surface.
机译：XC72炭黑使用蒸汽蚀刻技术进行处理。开发了使用蒸汽蚀刻炭黑（SECB）作为载体的Pt催化剂，用于聚合物电解质燃料电池（PEFC）中的氧还原反应。如透射电子显微镜（TEM）数据所示，使用蒸汽蚀刻的炭黑作为催化剂载体可以改善Pt纳米颗粒在载体表面上的分散均匀性，并且可以减小Pt粒径。使用SECB的催化剂的总体催化性能优于使用非SECB的催化剂的总体催化性能。使用SECB腐蚀1 h的Pt催化剂的质量活性对于使用SECB的催化剂和使用非SECB的催化剂均具有最佳的催化性能。另外，在蚀刻之后，Pt / SECB的电化学活性表面积显着增加。 TEM结果表明，炭黑的中心比表面更容易被蚀刻。

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