Synergistic Effect of Cobalt and Iron in Layered Double Hydroxide Catalysts for the Oxygen Evolution Reaction

被引：147

作者：

Yang, Fengkai ^{[1
]}

Sliozberg, Kirill ^{[2
,3
]}

Sinev, Ilya ^{[4
]}

Antoni, Hendrik ^{[1
]}

Baehr, Alexander ^{[1
]}

Ollegott, Kevin ^{[1
]}

Xia, Wei ^{[1
]}

Masa, Justus ^{[2
,3
]}

Gruenert, Wolfgang ^{[1
]}

Roldan Cuenya, Beatriz ^{[4
]}

Schuhmann, Wolfgang ^{[2
,3
]}

Muhler, Martin ^{[1
]}

机构：

[1] Ruhr Univ Bochum, Lab Ind Chem, Univ Str 150, D-44780 Bochum, Germany

[2] Ruhr Univ Bochum, Analyt Chem, Univ Str 150, D-44780 Bochum, Germany

[3] Ruhr Univ Bochum, CES, Univ Str 150, D-44780 Bochum, Germany

[4] Ruhr Univ Bochum, Dept Phys, Univ Str 150, D-44780 Bochum, Germany

来源：

CHEMSUSCHEM | 2017年 / 10卷 / 01期

关键词：

cobalt; iron; layered double hydroxides; oxygen evolution reaction; stability; WATER OXIDATION; THERMAL-DECOMPOSITION; EVOLVING CATALYST; CO-AL; ELECTROCATALYSTS; OXIDE; FE; STABILITY; SPECTROSCOPY; OXYHYDROXIDE;

D O I：

10.1002/cssc.201601272

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Co-based layered double hydroxide (LDH) catalysts with Fe and Al contents in the range of 15 to 45 at% were synthesized by an efficient coprecipitation method. In these catalysts, Fe3+ or Al3+ ions play an essential role as trivalent species to stabilize the LDH structure. The obtained catalysts were characterized by a comprehensive combination of surface-and bulksensitive techniques and were evaluated for the oxygen evolution reaction (OER) on rotating disk electrodes. The OER activity decreased upon increasing the Al content for the Co-and Al-based LDH catalysts, whereas a synergistic effect in Co-and Fe-based LDHs was observed, which resulted in an optimal Fe content of 35 at %. This catalyst was spray-coated on Ni foam electrodes and showed very good stability in a flow-through cell with a potential of approximately 1.53 V at 10 mAcm(-2) in 1m KOH for at least 48 h.

引用

页码：156 / 165

页数：10

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