Electrochemical Study of the Energetics of the Oxygen Evolution Reaction at Nickel Iron (Oxy)Hydroxide Catalysts

被引：313

作者：

Swierk, John R. ^{[1
]}

Klaus, Shannon ^{[1
,2
]}

Trotochaud, Lena ^{[1
]}

Bell, Alexis T. ^{[1
,2
]}

Tilley, T. Don ^{[1
,3
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Joint Ctr Artificial Photosynth, Div Mat Sci, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Chem & Biomol Engn, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2015年 / 119卷 / 33期

关键词：

WATER OXIDATION; OXIDE CATALYSTS; PASSIVE FILM; THIN-FILMS; ELECTRODES; FE; ELECTROCATALYSTS; NI; IMPEDANCE; KINETICS;

D O I：

10.1021/acs.jpcc.5b05861

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

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.

引用

页码：19022 / 19029

页数：8

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