期刊
BATTERIES-BASEL
卷 8, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/batteries8100150
关键词
oxygen reduction reaction; non-precious metal catalyst; Pharaoh's snakes; electrocatalysts; Li-air battery
资金
- National Natural Science Foundation of China [21776219, 21872104]
- Tianjin Key Laboratory of Green Chemical Engineering Process Engineering [GCEPE20190106]
- China Postdoctoral Science Foundation [2018M631746]
- Basic Research Program of Jiangsu [SBK20201213]
The oxygen reduction reaction (ORR) is crucial for clean energy storage and conversion. However, due to slow kinetics and expensive catalyst requirements, the wide application of fuel cells and other clean power sources is hindered. Therefore, finding low-cost metal catalysts is of great importance. In this study, a Co3O4 catalyst supported on N-doped carbon was prepared and exhibited similar electrocatalytic activity to commercial Pt/C catalysts.
The oxygen reduction reaction (ORR) is of great importance for clean energy storage and conversion techniques such as fuel cells and metal-air batteries (MABs). However, the ORR is kinetically sluggish, and expensive noble metal catalysts are required. The high price and limited preservation of noble metal catalysts has largely hindered the wide application of clean power sources such as fuel cells and MABs. Therefore, it is important to prepare non-expensive metal catalysts (NPMC) to cut the price of the fuel cells and MABs for wide application. Here, we report the preparation of a Co3O4 carried on the N-doped carbon (Co/N-C) as the ORR NPMC with a facile Pharaoh's Snakes reaction. The gas generated during the reaction is able to fabricate the porous structure of the resultant carbon doped with heteroatoms such as Co and N. The catalyst provides a high electrocatalytic activity towards ORR via the 4-e pathway with an onset and half-wave potential of 0.98 and 0.79 V (vs. RHE), respectively, in an electrolyte of 0.1 M KOH. The onset and half-wave potentials are close to those of the commercial Pt/C. This work demonstrates the promising potential of an ancient technology for preparing NPMCs toward the ORR.
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