原位57Fe穆斯堡尔光谱技术及其在Ni-Fe基析氧反应电催化剂中的应用

Jafar Hussain Shah, 谢起贤, 匡智崇, 格日乐, 周雯慧, 刘朵绒, Alexandre I. Rykov, 李旭宁, 罗景山, 王军虎

In-Situ/Operando 57Fe Mössbauer Spectroscopic Technique and Its Applications in NiFe-based Electrocatalysts for Oxygen Evolution Reaction

Jafar Hussain Shah, Qi-Xian Xie, Zhi-Chong Kuang, Ri-Le Ge, Wen-Hui Zhou, Duo-Rong Liu, Alexandre I. Rykov, Xu-Ning Li, Jing-Shan Luo, Jun-Hu Wang

Table 3 The content of high-valent iron in-situ produced in the NiFe0.2-OxHy electrocatalyst during the oxygen evolution reaction.

This work[65] (NiFe0.2-OxHy) Previous report[47] (Layered 3:1 NiFe oxyhydroxide) Potential (V vs. RHE) Fe4+ Potential (V vs. RHE) Fe4+ Fe4+ (%) δ/Fe (mm·s-1) Fe4+ (%) δ/Fe (mm·s-1) 1.32 0 - - - - 1.37 2 -0.25 - - - 1.42 (around onset) 12 -0.24 1.49 (around onset) 0 - 1.47 23 -0.25 - - - 1.52 36 -0.24 - - - 1.57 40 -0.25 1.62 12 -0.27 - - - 1.76 21 -0.25