期刊
CARBON
卷 150, 期 -, 页码 93-100出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2019.05.012
关键词
Non-precious metal nanocomposite; One-pot pyrolysis method; Doped graphene-like carbon; Iron carbide nanoparticles; Bifunctional electrocatalytic activity
资金
- Chinese National Science Foundation [21571010, U0734002]
- National Basic Research Programs of China (973 Program) [2014CB931800, 2011CB935700]
- Chinese Aeronautic Project [2013ZF51069]
- 111 Project [B14009]
A novel kind of non-precious metal Fe3C@Fe,N,S-GCM nanocomposite with very low metal content is obtained by a simple one-pot pyrolysis method using abundent, low cost and environmental friendly resouces. In the Fe3C@Fe,N,S-GCM nanocomposite, the Fe3C nanoparticles are uniformly anchored on the Fe,N,S-codoped graphene-like carbonaceous matrix. Synergetic multiple electrocatalytic active sites of Fe3C, Fe-N-x and N,S-co-doped carbon are identified for Fe3C@Fe,N,S-GCM. The Fe3C@Fe,N,S-GCM nanocomposite also possesses the high BET surface area and meso/macropore volume from the hierarchical porous superstructure, which may benefit the storing and transport of electrolyte ions. Attributed to the rational content and microstructure, the Fe3C@Fe,N,S-GCM presents a high bifunctional electrocatalytic activity for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) with the Delta E (= E-OER - E-ORR) of only 0.750 V. The bifunctional electrocatalytic activity is not only better than the commercial precious metal couples of RuO2 (OER) and Pt/C (ORR), but also represents the superiority among the non-precious metal ferrous bifunctional electrocatalysts. (C) 2019 Elsevier Ltd. All rights reserved.
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