双金属片
吸附
化学
甲醇
钯
催化作用
氧气
金属
合理设计
离解(化学)
Boosting(机器学习)
组合化学
化学工程
材料科学
纳米技术
有机化学
机器学习
工程类
计算机科学
作者
Fu Hui,Juan Wang,Yao Chen,Honggang Huang,Yan Wang,Hanjun Li,Feili Lai,Longsheng Zhang,Nan Zhang,Jiadong Chen,Tianxi Liu
标识
DOI:10.1016/j.cej.2023.144255
摘要
Palladium (Pd) plays a vital role in oxygen reduction reaction (ORR) for direct methanol fuel cells due to its excellent activity, but it still suffers from CO poisoning and low CH3OH tolerance. Herein, for the first time, the Pd3Pb bimetallic aerogels (BMAs) were synthesized by ionic liquid assisted strategy for boosting ORR performance. The Pd3Pb BMAs possess excellent ORR activity and anti-poisoning property in 0.1 M KOH and maintain their original ORR activity after 10,000 cycles even in poisoning circumstances, outperforming Pd metallic aerogels and the commercial Pd/C. Mechanism studies show that the strong interaction between Pd and Pb, as well as the abundant unsaturated sites of the Pd3Pb BMAs are beneficial to optimizing the adsorption and dissociation of intermediates during ORR, while suppressing the adsorption of CO and CH3OH. This work demonstrates a novel route to the rational development of excellent active and anti-poisoned ORR electrocatalysts based upon BMAs.
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