Dual Fe, Zn single atoms anchored on carbon nanotubes inlaid N, S-doped hollow carbon polyhedrons for boosting oxygen reduction reaction

Dawei Liu; Katam Srinivas; Xin Chen; Fei Ma; Xiaojuan Zhang; Xinqiang Wang; Bin Wang; Yuanfu Chen

doi:10.1016/j.jcis.2022.05.167

Dual Fe, Zn single atoms anchored on carbon nanotubes inlaid N, S-doped hollow carbon polyhedrons for boosting oxygen reduction reaction

J Colloid Interface Sci. 2022 Oct 15:624:680-690. doi: 10.1016/j.jcis.2022.05.167. Epub 2022 Jun 2.

Authors

Dawei Liu¹, Katam Srinivas¹, Xin Chen¹, Fei Ma¹, Xiaojuan Zhang¹, Xinqiang Wang², Bin Wang³, Yuanfu Chen⁴

Affiliations

¹ School of Electronic Science and Engineering, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China.
² Institute of Science and Technology for New Energy, Xi'an Technological University, Xi'an 710021, PR China. Electronic address: 843689677@qq.com.
³ School of Electronic Science and Engineering, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China. Electronic address: wangbin403403@126.com.
⁴ School of Electronic Science and Engineering, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China; Institute of Oxygen Supply, and College of Science, Tibet University, Lhasa 850000, PR China. Electronic address: yfchen@uestc.edu.cn.

PMID: 35691232
DOI: 10.1016/j.jcis.2022.05.167

Abstract

It is still challengeable but significant to rationally develop dual-metal single-atom catalysts with rich accessible active sites and excellent intrinsic catalytic activity towards oxygen reduction reaction (ORR). Herein, we present a novel dual-metal single-atom catalyst, Fe and Zn single atoms homogenously anchored on carbon nanotubes inlaid N, S-doped hollow carbon polyhedrons (FeZn-NSC), synthesized by facile iron-salt impregnation and high-temperature pyrolysis for zeolitic imidazolate framework-8. Due to the synergistic effects of the hierarchical porous nanoarchitecture with high specific surface area (795.48 m² g^-1), N, S co-doped hollow carbon polyhedrons, in-situ grown highly conductive carbon nanotubes, and high loading of dual-metal single-atoms of Fe (3.12 wt%) and Zn (3.71 wt%), the optimized FeZn-NSC delivers outstanding ORR performance with high half-wave potential of 0.87 V, low Tafel slope of 44.7 mV dec^-1, long-term durability, and strong tolerance of methanol crossover. This work provides a strategy to rationally design and facilely synthesize dual-metal single-atom catalysts with high ORR activity.

Keywords: Dual-metal single-atom catalyst; Fe and Zn single atoms; Hollow carbon polyhedrons; In-situ grown carbon nanotubes; N, S co-doped carbon materials; Oxygen reduction reaction.