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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 Shah1, 谢起贤2, 匡智崇1, 格日乐1, 周雯慧1, 刘朵绒1, Alexandre I. Rykov1, 李旭宁1, 罗景山2, 王军虎1,*()
In-Situ/Operando 57Fe Mössbauer Spectroscopic Technique and Its Applications in NiFe-based Electrocatalysts for Oxygen Evolution Reaction
Jafar Hussain Shah1, Qi-Xian Xie2, Zhi-Chong Kuang1, Ri-Le Ge1, Wen-Hui Zhou1, Duo-Rong Liu1, Alexandre I. Rykov1, Xu-Ning Li1, Jing-Shan Luo2, Jun-Hu Wang1,*()

Figure 14. (A) Cyclic voltammetric curves of NiFe0.2-OxHy before (the black curves, α-phase Ni(OH)2 structure) and after electrochemical activation (the red curves, γ-phase NiOOH structure). (B-C) 57Fe Mössbauer spectra of NiFe0.2-OxHy before and after electrochemical activation. (D) Raman spectra of NiFe0.2-OxHy before (black) and after (red) applying anodic potential. (E) Operando Raman spectra of NiFe0.2-OxHy collected at different applied potentials (V vs. RHE). (F) The OER polarization curves with iR correction. (G) Overpotentials at 10 mA·cm-2. (H) Tafel plots of NiFem-OxHy with different molar ratios of Fe/Ni and commercial RuO2. (I) Chronopotentiometric curves of NiFe0.2-OxHy on Ni foam with different catalyst loadings at a constant current density of 100 mA·cm-2 for 100 h. The inset shows the chronopotentiometric curve of NiFe0.2-OxHy at a constant current density of 10 mA·cm-2[66]. Copyright 2021. ELSEVIER B.V. Reproduced with permission. (color on line)

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