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Rational design and synthesis of hollow Fe-N/C electrocatalysts for enhanced oxygen reduction reaction. 2021
School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou Higher Education Mega Center, No. 230 Wai Huan Xi Road, 510006, P. R. China. nanli@gzhu.edu.cn lzqgzu@gzhu.edu.cn and EVE Institute of New Energy Technology, No. 36, Huifeng 7th Road, Zhongkai Hi-Tech Zone, Huizhou, Guangdong 516006, P. R. China.
Herein, we report a one-step synthesis of a hollow Fe-N/C catalyst via a hard-templating strategy, in which FeNx sites are well dispersed on the carbon sphere. In particular, we found an optimal iron ratio on the catalyst surface for an enhanced alkaline oxygen reduction reaction (ORR). The catalyst with a high specific surface area of 311.71 m2 g-1 exposes abundant electroactive sites that facilitate the adsorption of oxygen intermediates, thus exhibiting superior ORR activity in alkaline solution.
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