用于酸性条件下析氧反应的高效α-FeO纳米环电催化剂。

Efficient electrocatalyst of α-FeO nanorings for oxygen evolution reaction in acidic conditions.

作者信息

Liang Xiaolei, Qian Jinmei, Liu Yonggang, Zhang Zhengmei, Gao Daqiang

机构信息

Key Laboratory for Gynecologic Oncology Gansu Province, Department of Obstetrics and Gynecology, The First Hospital of Lanzhou University China

Key Laboratory for Magnetism and Magnetic Materials of MOE, Key Laboratory of Special Function Materials and Structure Design of MOE, Lanzhou University Lanzhou 730000 China.

出版信息

RSC Adv. 2020 Aug 6;10(49):29077-29081. doi: 10.1039/d0ra04262e. eCollection 2020 Aug 5.

DOI:10.1039/d0ra04262e

PMID:35521123

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9055951/

Abstract

Large-scale application of sustainable energy devices urgently requires cost-effective electrocatalysts to overcome the sluggish kinetics related to the oxygen evolution reaction (OER) under acidic conditions. Here, we first report the highly efficient electrocatalytic characteristics of α-FeO nanorings (NRs), which exhibits prominent OER electrocatalytic activity with lower overpotential of 1.43 V at 10 mA cm and great stability in 1 M HCl, surpassing the start-of-the art Ir/C electrocatalyst. The significantly optimized OER activity of the α-FeO NRs mainly attributes to the synergistic effect of the excellent electrical conductivity and a large effective active surface because of their unique nanoring structure, disordered surface, and the dynamic stability of α-FeO NRs in acidic conditions.

摘要

可持续能源装置的大规模应用迫切需要具有成本效益的电催化剂，以克服在酸性条件下与析氧反应（OER）相关的缓慢动力学。在此，我们首次报道了α-FeO纳米环（NRs）的高效电催化特性，其在10 mA cm下具有1.43 V的较低过电位，表现出突出的OER电催化活性，并且在1 M HCl中具有良好的稳定性，超过了目前最先进的Ir/C电催化剂。α-FeO NRs显著优化的OER活性主要归因于其独特的纳米环结构、无序表面以及α-FeO NRs在酸性条件下的动态稳定性所带来的优异导电性和大有效活性表面的协同效应。