Diluted silicon promoting Pd/Pt catalysts for oxygen reduction reaction with strong anti-poisoning effect

Ma, Mengjie ¹Zhang, Yi ¹Ji, Yujin ¹Shao, Qi ¹Yin, Kui ¹Zhu, Wenxiang ¹Yang, Junjun ¹Liao, Fan ¹Fan, Zhenglong ¹Liu, Yang ¹Li, Youyong ¹Shao, Mingwang ¹Kang, Zhenhui¹

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作者信息

1. Soochow Univ
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Abstract

Poisoning species, such as methanol and air pollutants, degrade the electrocatalytic activity for oxygen reduction reaction (ORR). Here, via taking advantage of the varied electronic property of nano-silicon, a versatile strategy is reported for enhancing the catalytic activity and anti-poisoning ability toward ORR by decorating noble metal catalysts with the size-controlled silicon nanoclusters (DS). Consequently, DS-Pd exhibits the enhanced ORR performance with a large halfwave potential of 0.892 V and an onset potential of 1.010 V. More importantly, it also shows enhanced anti-poisoning performance in methanol, NaNO2 and NaHSO3 electrolytes, compared to those of commercial Pt/C and Pd/C catalysts. Mechanism studies reveal that the synergistic effect between Pd and more oxygen-philic and less poison-philic Si nanoclusters largely abbreviate the absorption of poisoning species on the active sites. This strategy also improves the methanol-tolerant performance of Pt based catalysts, providing a versatile strategy for the fabrication of methanol-tolerant ORR catalysts.

Key words

Oxygen reduction reaction/Noble metals/Silicon nanoclusters/Anti-poisoning/HYDROGEN EVOLUTION/NANOCRYSTALS

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量9

参考文献量58

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