期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 587, 期 -, 页码 810-819出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.11.040
关键词
Atomically dispersed catalyst; Fe-N-C catalyst; Petroleum asphalt; Oxygen reduction reaction; Zinc-air battery
资金
- Shandong Provincial Natural Science Foundation, China [ZR2019QB016, ZR2018ZC1458]
- National Natural Science Foundation of China, China [U1662113]
- Fundamental Research Fund for the Central Universities, China [18CX02015A, 15CX08005A]
- Taishan Scholar Project of Shandong Province of China, China [Nots201712020]
- Technological Leading Scholar of 10000 Talent Project, China [W03020508]
A simple and cost-effective strategy for the scalable synthesis of atomically dispersed Fe-N-C derived from petroleum asphalt is proposed in this study. By intercalating an appropriate amount of petroleum asphalt, the graphitic degree is improved to reinforce the atomic Fe-N-x active sites.
Massive production of efficient, durable, and low-cost electrocatalysts toward oxygen reduction reaction (ORR) is urgently desired for the development of energy storage and conversion devices. In this study, a facile and cost-effective strategy is proposed for the scalable synthesis of atomically dispersed Fe-N-C derived from petroleum asphalt (Fe-N-C@PA) as a reinforced catalyst for ORR. The Fe-N-C@PA is fabricated through a layer-by-layer cladding template and subsequent pyrolysis method. Intercalating appropriate amount of petroleum asphalt not only improves the graphitic degree to reinforce the atomic Fe-N-x active sites, but also increases mass yield of the catalyst (similar to 220%) compared with the Fe-N-C counterpart. Serving as an ORR electrocatalyst, the optimized Fe-N-C@PA-1:4 provides almost a fourelectron transfer pathway (3.96) and exhibits superior electrocatalytic activity with a half-wave potential (E-1/2) of 0.90 V to the commercial Pt/C catalyst (E-1/2 = 0.86 V), as well as promoted durability and methanol tolerance in alkaline medium. Moreover, the zinc-air battery based on Fe-N-C@PA-1:4 cathode delivers a high power density of 166.7 mW cm(-2). This work may help the massive production of robust atomically dispersed non-noble metal catalysts for ORR and provide a new avenue for the high valueadded utilization of petroleum asphalt. (c) 2020 Elsevier Inc. All rights reserved.
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