Single-atom oxygen reduction reaction electrocatalysts of Fe, Si, and N co-doped carbon with 3D interconnected mesoporosity
- Authors
- Kim, Hee Soo; Lee, Chi Ho; Jang, Jue-Hyuk; Kang, Min Seok; Jin, Haneul; Lee, Kug-Seung; Lee, Sang Uck; Yoo, Sung Jong; Yoo, Won Cheol
- Issue Date
- Feb-2021
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY A, v.9, no.7, pp 4297 - 4309
- Pages
- 13
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY A
- Volume
- 9
- Number
- 7
- Start Page
- 4297
- End Page
- 4309
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/449
- DOI
- 10.1039/d0ta11208a
- ISSN
- 2050-7488
2050-7496
- Abstract
- The development of non Pt-based catalysts (non-PBCs) that show excellent oxygen reduction reaction (ORR) activity for high-performance Zn-air battery (ZAB) and anion exchange membrane fuel cell (AEMFC) is highly necessitated. Here, the unprecedented single-atom ORR activity of Fe, Si, and N co-doped carbon (FeSiNC) supported on 3D interconnected mesoporous carbons (25 and 50 nm) derived from silica templates is reported. Si moieties connected to a carbon surface were involved in the formation of an atomically distributed FeSixN4-x site through substitution of Si at the N position in the Fe-N-4 site, which is the ORR active site of the conventional FeNC. FeSiNC with its larger mesopore (50 nm) exhibits outstanding ORR activity comparable to the most efficient non-Pt-based catalysts and enhanced single-cell performances due to its enhanced mass-transport property. According to theoretical calculations, the ORR activity is originated from not only FeSixN4-x sites located at the basal plane and inter-edge sites, but also C sites adjacent to the Si dopant in both edge and basal regions. Therefore, this study provides a facile strategy toward the rational design of inexpensive and highly active ORR catalysts applicable to single-cell devices.
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Collections - COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY > DEPARTMENT OF CHEMICAL AND MOLECULAR ENGINEERING > 1. Journal Articles
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