催化作用
氢氧化物
镍
析氧
电化学
化学
无机化学
法拉第效率
活化能
氧气
电化学能量转换
物理化学
电极
有机化学
作者
John R. Swierk,Shannon Klaus,Lena Trotochaud,Alexis T. Bell,T. Don Tilley
标识
DOI:10.1021/acs.jpcc.5b05861
摘要
Iron-doped nickel (oxy)hydroxide catalysts (FexNi1–xOOH) exhibit high electrocatalytic behavior for the oxygen evolution reaction in base. Recent findings suggest that the incorporation of Fe3+ into a NiOOH lattice leads to nearly optimal adsorption energies for OER intermediates on active Fe sites. Utilizing electrochemical impedance spectroscopy and activation energy measurements, we find that pure NiOOH and FeOOH catalysts exhibit exceedingly high Faradaic resistances and activation energies 40–50 kJ/mol−1 higher than those of the most active FexNi1–xOOH catalysts. Furthermore, the most active FexNi1–xOOH catalysts in this study exhibit activation energies that approach those previously reported for IrO2 OER catalysts.
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