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

• DOI: 10.1021/acsmaterialslett.4c00716
• Publication Date: 2024-06-12T10:20:21Z
• Authors: Qianyun Bai; Da Liu; Xiaoxiao Yan; Peifang Guo; Xingyu Ding; Kang Xiang; Xin Tu; Yanhui Guo; Renbing Wu
• Keywords: Overpotential; Oxygen evolution; Electrolysis of water

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 vacancies are developed through low-cost wet chemical deposition strategy toward this Benefiting from synergistic effect multimetal atom interaction and high exposure active sites caused by structure, as-developed electrocatalyst exhibits exceptional catalytic performance low overpotential only 221 mV at current density 100 mA cm–2 negligible degradation over 240 h. Furthermore, FeNiCoOx/CoOx-assembled anion exchange membrane electrolyzer (AEMWE) can achieve 1 A voltage 1.765 V, demonstrating its great potential for practical application.