p Insights into the Determining Effect of Carbon Support Properties on Anchoring Active Sites in Fe-N-C Catalysts toward the Oxygen Reduction Reaction

He, Jing1; Zheng, Tianlong1; Wu, Duojie2; Zhang, Shuomeng1; Gu, Meng2; He, Qinggang1,3

2022

10.1021/acscatal.1c04815

ACS Catalysis   影响因子和分区

2155-5435

As one of the most promising non-noble metal electrocatalysts for the oxygen reduction reaction (ORR), previous investigations on Fe-N-C materials have mainly focused on the innovation of synthetic methods, identification of active sites, and structure optimization, but the intrinsic properties of carbon supports used to anchor Fe-Nx active sites have often been neglected. Herein, graphene oxide (GO) and reduced GO (rGO) are used as support models for heteroatom doping to prepare Fe-N-C catalysts. The obvious and easily distinguishable defects and the content of oxygencontaining functional groups in GO and rGO directly determined the doping content, structure type, and coordination environment of N and Fe. Notably, through analysis of the surface potential as a common parameter measured by Kelvin probe force microscopy, local work functions of these graphene-based catalysts at the nanoscale and their statistical averages were used to study the distribution of active sites and their association with ORR kinetics. This insight into the influence of carbon support structure properties on active sites and the work function-ORR performance relationship may provide guidance for exploring the origin of ORR activity and designing better non-noble metal electrocatalysts.

non-noble metal electrocatalysts carbon supports active sites oxygen reduction reaction Kelvin probe force microscopy

SCI ; EI

英语

其他

National Natural Science Foundation of China[21978260,22178307]

Chemistry

Chemistry, Physical

WOS:000743636000001

AMER CHEMICAL SOC

20220411537595

Catalyst activity ; Electrocatalysts ; Electrolytic reduction ; Graphene ; Iron compounds ; Oxygen ; Precious metals ; Probes ; Structural optimization ; Work function

Ore Treatment:533.1 ; Precious Metals:547.1 ; Nanotechnology:761 ; Electrochemistry:801.4.1 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Optimization Techniques:921.5 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4

Web of Science

1.Zhejiang Univ, Coll Chem & Biol Engn, Zhejiang Prov Key Lab Adv Chem Engn Manufacture D, Hangzhou 310027, Zhejiang, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Guangdong Prov Key Lab Energy Mat Elect Power, Shenzhen 518055, Peoples R China
3.Zhejiang Univ, Ningbo Res Inst, Ningbo 315100, Zhejiang, Peoples R China

He, Jing,Zheng, Tianlong,Wu, Duojie,et al. p Insights into the Determining Effect of Carbon Support Properties on Anchoring Active Sites in Fe-N-C Catalysts toward the Oxygen Reduction Reaction[J]. ACS Catalysis,2022,12(3):1601-1613.

He, Jing,Zheng, Tianlong,Wu, Duojie,Zhang, Shuomeng,Gu, Meng,&He, Qinggang.(2022).p Insights into the Determining Effect of Carbon Support Properties on Anchoring Active Sites in Fe-N-C Catalysts toward the Oxygen Reduction Reaction.ACS Catalysis,12(3),1601-1613.

He, Jing,et al."p Insights into the Determining Effect of Carbon Support Properties on Anchoring Active Sites in Fe-N-C Catalysts toward the Oxygen Reduction Reaction".ACS Catalysis 12.3(2022):1601-1613.