Ternary PtRuTe alloy nanofibers as an efficient and durable electrocatalyst for hydrogen oxidation reaction in alkaline media
Source abstract
Abstract
由于金属铂在碱性介质中针对氢气氧化反应的电催化活性比酸性介质中低两个数量级, 阳极上缓慢的反应动力学不利于阴离子交换膜燃料电池的商业化. 因此, 发展高效且稳定的铂基催化剂显得十分迫切. 我们在本文中报道了一种电置换反应合成铂原子比仅为11%的三元PtRuTe合金纳米纤维的简易方法. 通过调节碲对铂和钌的电子贡献可以优化表面铂和钌原子与氢和羟基物质之间的吸附强度. 基于此, 该PtRuTe催化剂的动力学电流密度和交换电流密度在50 mV(相比于可逆氢电极)时达到了30.6 mA cm−2 geo和0.426 mA cm−2 metal, 分别是碱性介质中商业Pt/C催化剂活性的3倍和2.5倍. 此外, PtRuTe催化剂在2000次电势循环后活性仅衰减5%, 展现出了优异的稳定性. 本研究可为合理设计多元合金以提高碱性介质中氢气氧化电催化效率提供参考.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Advanced battery technologies research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (58)
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