铋
催化作用
选择性
铂金
金属
化学
无机化学
过渡金属
材料科学
纳米技术
化学工程
冶金
有机化学
工程类
作者
Zewen Zhuang,Aijian Huang,Xin Tan,Kaian Sun,Chen Chen,Qing Peng,Zhongbin Zhuang,Tong Han,Hai Xiao,Yuan Zeng,Wei Yan,Jiujun Zhang,Yadong Li
出处
期刊:Joule
[Elsevier]
日期:2023-05-01
卷期号:7 (5): 1003-1015
被引量:28
标识
DOI:10.1016/j.joule.2023.04.005
摘要
Summary
For oxygen reduction reaction (ORR), replacing the conventional electrocatalysts based on platinum-group metals (PGMs) with alternatives based on non-noble metals is vital for the large-scale applications of green energy conversion and chemical synthesis. Here, we report the discovery of ORR catalysts based on the p-block-metal bismuth (Bi); the selectivity in ORR pathways could be controlled by tailoring the size of Bi. Specifically, the metallic Bi nanoparticles gave a high selectivity (>96%) for 2e− ORR, an ultra-high kinetic current density (3.8 mA·cm−2 at 0.65 V), and an excellent stability; in contrast, the single-atomic-site Bi catalysts gave a good selectivity for 4e− ORR and a corresponding half-wave potential of 0.875 V, approaching that of the best-known Fe/NC catalysts. This work presents new high-performance ORR catalysts based on the p-block-metal Bi, in contrast to the intensively studied d-block transition metals, and thus would provide new perspectives for developing PGM-free ORR catalysts.
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