普鲁士蓝
煅烧
催化作用
纳米颗粒
电解质
电池(电)
材料科学
贵金属
化学工程
无机化学
阴极
电化学
化学
纳米技术
电极
物理化学
有机化学
功率(物理)
物理
量子力学
工程类
作者
Xiaoyang Dong,Jinxing Wang,Xiao Wang,Jingdong Yang,Zhu Luan,Wen Zeng,Guangsheng Huang,Jingfeng Wang,Fusheng Pan
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2022-01-01
卷期号:169 (1): 010532-010532
被引量:5
标识
DOI:10.1149/1945-7111/ac4b25
摘要
Developing efficient, durable, and cost-effective non-noble metal catalysts for oxygen reduction reaction (ORR) is necessary to promote the efficiency and performance of Mg-air batteries. Herein, the Co 3 O 4 /CuO nanoparticles were synthesized by a low-cost and simple approach using CuCo-based prussian blue analogue (PBA) as precursor of pyrolysis at different calcination temperatures. It was found that the Co 3 O 4 /CuO nanoparticles calcined at 600 °C (CCO-600) have relatively small size and superior ORR performance. The onset potential is 0.889 V and the diffusion limiting current density achieves 6.746 mA·cm −2 , as well as prominent stability in 0.1 M KOH electrolyte. The electron transfer number of the CCO-600 is 3.89 under alkaline medium, which indicates that the reaction mechanism of ORR is dominated by 4 e process similar to commercial Pt. The primary Mg-air battery with the CCO-600 as the cathode catalyst has been assembled and possesses better discharge performance than the CuCo-based PBA. The open circuit voltage of CCO-600 arrives at 1.76 V and the energy density reaches 1895.95 mWh/g. This work provides an effective strategy to develop non-noble metal ORR catalyst for the application of metal-air batteries.
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