Citation: Xue Wang, Li Zhang, Meiling Xiao, Junjie Ge, Wei Xing, Changpeng Liu, Jianbing Zhu. Polymer-chelation approach to high-performance Fe-N_x-C catalyst towards oxygen reduction reaction[J]. Chinese Chemical Letters, ;2023, 34(4): 107455. doi: 10.1016/j.cclet.2022.04.053 shu

Polymer-chelation approach to high-performance Fe-N_x-C catalyst towards oxygen reduction reaction

Xue Wang ^{a, b, c} ,
Li Zhang ^d ,
Meiling Xiao ^{b, d} ,
Junjie Ge ^{a, b, c, d} ,
Wei Xing ^{a, b, c, d} ,
Changpeng Liu ^{a, b, c, d, *,} ,
Jianbing Zhu ^{a, b, c, d, *,}

a.
Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
b.
School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
c.
Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun 130022, China
d.
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

liuchp@ciac.ac.cn

zjb@ciac.ac.cn

Received Date: 15 March 2022
Revised Date: 15 April 2022
Accepted Date: 20 April 2022
Available Online: 25 April 2022

Figures(4)

Pyrolyzed Fe-N_x-C with atomically dispersed Fe-N_x sites are hailed as the most promising alternative to the noble metal Pt-based catalysts towards oxygen reduction reaction (ORR). However, the conventional micropore-confinement synthetic approach usually causes the insufficient utilization of active sites and mass transport resistance as the sites are located inside the micropore. We herein report a polymer-chelation strategy to directly disperse the Fe-N_x active sites onto the carbon surface. The N-rich monomer was in-situ polymerized on the carbon support and then chelated with Fe. The strong Fe-N chelating interaction is crucial to suppress Fe aggregation when undergoing the high-temperature pyrolysis. Due to the enriched surface sites, hierarchically porous structure and excellent conductivity of carbon support, the optimal catalyst (denoted as Fe-N_x-C@C-900) exhibits impressive ORR activity of onset and half-wave potential of 1.02 and 0.87 V, respectively, superior to the Pt/C benchmark.
- Oxygen reduction reaction,
- Electrocatalyst,
- Active site,
- Atomically dispersed metal,
- Hierarchically porous
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沈阳化工大学材料科学与工程学院沈阳 110142

Polymer-chelation approach to high-performance Fe-Nx-C catalyst towards oxygen reduction reaction

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通讯作者: 陈斌, bchen63@163.com

Polymer-chelation approach to high-performance Fe-N_x-C catalyst towards oxygen reduction reaction