期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 883, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.160726
关键词
Biomass; Electrocatalytic; Heteroatom doping; Oxygen reduction reaction; Methanol oxidation reaction
资金
- National Natural Science Foundation of China [51763021, 51363020, 21164012]
A successful synthesis of a non-noble metal oxygen reduction catalyst, derived from high-nitrogen content carbon material and Ca modification, exhibits excellent ORR catalytic performance and methanol poisoning resistance, while also serving as a good support for Pt nanoparticles.
The search for non-noble metal catalysts drive from biomass materials for oxygen reduction reactions (ORR) is highly desirable but challenging. Here, we have designed and synthesized three-dimensional hierarchical porous Ca-modified nitrogen and phosphorus co-doped carbon materials (Ca@NP6C4) derived from biomass hydrogel. Notably, the resulting Ca@NP6C4 material has high content of nitrogen (29.71 wt%),and relatively high content percentage of pyridinic and graphitic nitrogen. As an efficient non-noble metal electrocatalyst, Ca@NP6C4 exhibits a high onset potential (0.94 V vs RHE) and a four-electron pathway for oxygen reduction reaction as well as good durability and outstanding methanol poisoning tolerance. Besides, it also performs as a good support for Pt particles (NPs). Pt/Ca@NP6C4 catalyst displayed remarkable catalytic performance and high stability for methanol electrooxidation reaction in acid medium. This work provides a feasible approach to develop cost-effective and highly efficient non-precious metal electrochemical catalysts for oxygen reduction. (C) 2021 Elsevier B.V. All rights reserved.
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