电催化剂
催化作用
过渡金属
电池(电)
电化学
甲醇
热解
氧还原反应
化学工程
材料科学
纳米技术
阴极
锌
化学
无机化学
物理化学
电极
功率(物理)
有机化学
热力学
冶金
工程类
物理
作者
Honghao Zhang,Huoliang Gu,Guoshuai Shi,Ke Yu,Chunlei Yang,Haonan Tong,Shuai Zhao,Mingwei Chang,Chenyuan Zhu,Chen Chen,Liming Zhang
出处
期刊:Nano Letters
[American Chemical Society]
日期:2023-04-27
卷期号:23 (9): 3803-3809
被引量:3
标识
DOI:10.1021/acs.nanolett.3c00133
摘要
Designing an active, stable, and nonprecious metal catalyst substitute for Pt in the oxygen reduction reaction (ORR) is highly demanded for energy-efficient and cost-effective prototype devices. Single-atomic-site catalysts (SASCs) have been widely concerning because of their maximum atomic utilization and precise structural regulation. Despite being challenging, the controllable synthesis of SASCs is crucial for optimizing ORR activity. Here, we demonstrate an ultrathin organometallic framework template-assisted pyrolysis strategy to synthesize SASCs with a unique two-dimensional (2D) architecture. Electrochemical measurements revealed that Fe-SASCs displayed an excellent ORR activity in an alkaline media, having a half-wave potential and a diffusion-limited current density comparable to those of commercial Pt/C. Remarkably, the durability and methanol tolerance of Fe-SASCs were even superior to those of Pt/C. Furthermore, Fe-SASCs displayed a maximum power density of 142 mW cm-2 with a current density of 235 mA cm-2 as a cathode catalyst in a zinc-air battery, showing its great potential for practical applications.
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