Facile synthesis of ZnCo-ZIFs-derived ZnxCo3-xO4 hollow polyhedron for efficient oxygen evolution reduction

Lei Wang; Tianjiao Meng; Chunxia Chen; Yanwei Fan; Qianqian Zhang; Huan Wang; Yufan Zhang

doi:10.1016/j.jcis.2018.08.038

Facile synthesis of ZnCo-ZIFs-derived Zn_xCo_3-xO₄ hollow polyhedron for efficient oxygen evolution reduction

J Colloid Interface Sci. 2018 Dec 15:532:650-656. doi: 10.1016/j.jcis.2018.08.038. Epub 2018 Aug 12.

Authors

Lei Wang¹, Tianjiao Meng¹, Chunxia Chen¹, Yanwei Fan¹, Qianqian Zhang¹, Huan Wang¹, Yufan Zhang²

Affiliations

¹ Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, 071002 Baoding, PR China.
² Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, 071002 Baoding, PR China. Electronic address: zyf@hbu.edu.cn.

PMID: 30119007
DOI: 10.1016/j.jcis.2018.08.038

Abstract

The construction of highly active and stable non-noble metal electrocatalysts for oxygen evolution reaction (OER) is a crucial requirement for green energy utilization. Herein, we report a novel hybrid nanostructure of Zn/Co bimetallic oxide (Zn_xCo_3-xO₄) hollow polyhedron through a pyrolysis-oxidation strategy derived from bimetallic Zn, Co-zeolitic imidazolate frameworks (ZnCo-ZIFs) rhombic polyhedral. Benefiting from the synergistic effects between highly active metal oxide and the unique polyhedron structure, the Zn_xCo_3-xO₄ hollow polyhedron hybrid displayed outstanding electrocatalytic performances in alkaline media. When the Zn_xCo₃_-_xO₄ polyhedron was employed as electrocatalysts for OER, a potential as low as 1.66 V (vs. RHE) was required to deliver the current density of 10 mA cm^-2 in 1 M KOH, and Zn_xCo_3-xO₄ still presented superior activity after continuously working for cyclic voltammetric scanning of 1000 cycles.

Keywords: Binary metal oxide; Oxygen evolution reaction; Zeolitic imidazolate frameworks; Zn(x)Co(3−x)O(4).