Oxygen Vacancy-Enriched Amorphous Transition Metal Ternary Oxides toward Highly Efficient Oxygen Evolution Reaction

Bai, Qianyun, Liu, Da, Yan, Xiaoxiao, Guo, Peifang, Ding, Xingyu, Xiang, Kang, Tu, Xin ORCID: 0000-0002-6376-0897, Guo, Yanhui ORCID: 0000-0002-7477-5234 and Wu, Renbing ORCID: 0000-0003-2815-2797 (2024) Oxygen Vacancy-Enriched Amorphous Transition Metal Ternary Oxides toward Highly Efficient Oxygen Evolution Reaction. ACS Materials Letters, 6 (7). pp. 2948-2956.

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Abstract

Developing highly efficient oxygen evolution reaction (OER) electrocatalysts based on earth-abundant elements is critical to improve the efficiency of water electrolysis, but it remains a challenge. Herein, an amorphous ternary oxides composites FeNiCoOx/CoOx with rich oxygen vacancies are developed through a low-cost wet chemical deposition strategy toward this challenge. Benefiting from the synergistic effect of multimetal atom interaction and high exposure of active sites caused by oxygen vacancies and amorphous structure, the as-developed FeNiCoOx/CoOx electrocatalyst exhibits an exceptional catalytic performance with a low overpotential of only 221 mV at a current density of 100 mA cm-2 and negligible performance degradation over 240 h. Furthermore, the FeNiCoOx/CoOx-assembled anion exchange membrane water electrolyzer (AEMWE) can achieve a high current density of 1 A cm-2 at a low voltage of 1.765 V, demonstrating its great potential for practical application.

Item Type:	Article
Uncontrolled Keywords:	40 Engineering, 4016 Materials Engineering, 7 Affordable and Clean Energy
Depositing User:	Symplectic Admin
Date Deposited:	15 Jul 2024 13:40
Last Modified:	15 Jul 2024 13:40
DOI:	10.1021/acsmaterialslett.4c00716
Related URLs:	Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3182862