Bifunctional Oxygen Reduction/Oxygen Evolution Activity of Mixed Fe/Co Oxide Nanoparticles with Variable Fe/Co Ratios Supported on Multiwalled Carbon Nanotubes

被引：53

作者：

Elumeeva, Karina ^{[1
]}

Kazakova, Mariya A. ^{[2
,3
]}

Morales, Dulce Maria ^{[1
]}

Medina, Danea ^{[1
]}

Selyutin, Alexander ^{[3
]}

Golubtsov, Georgiy ^{[2
,3
]}

Ivanov, Yurii ^{[4
,5
]}

Kuznetzov, Vladimir ^{[2
,3
]}

Chuvilin, Andrey ^{[6
,7
]}

Antoni, Hendrik ^{[8
]}

Muhler, Martin ^{[8
]}

Schuhmann, Wolfgang ^{[1
]}

Masa, Justus ^{[1
]}

机构：

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

[2] Novosibirsk State Univ, Pirogova 2, Novosibirsk 630090, Russia

[3] RAS, SB, Boreskov Inst Catalysis, Lavrentieva 5, Novosibirsk 630090, Russia

[4] Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria

[5] Far Eastern Fed Univ, Sch Nat Sci, Vladivostok 690950, Russia

[6] CIC NanoGUNE, Tolosa Hiribidea 76, Donostia San Sebastian 20018, Spain

[7] IKERBASQUE, Basque Fdn Sci, Bilbao 48013, Spain

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

来源：

CHEMSUSCHEM | 2018年 / 11卷 / 07期

基金：

俄罗斯基础研究基金会;

关键词：

bifunctional catalysts; Fe/Co oxide nanoparticles; multiwalled carbon nanotubes; oxygen evolution; oxygen reduction; WATER OXIDATION; COBALT OXIDE; SPINEL OXIDES; CO OXIDE; IN-SITU; ELECTROCATALYSTS; METAL; IRON; FE; CATALYSTS;

D O I：

10.1002/cssc.201702381

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A facile strategy is reported for the synthesis of Fe/Co mixed metal oxide nanoparticles supported on, and embedded inside, high purity oxidized multiwalled carbon nanotubes (MWCNTs) of narrow diameter distribution as effective bifunctional catalysts able to reversibly drive the oxygen evolution reaction (OER) and the oxygen reduction reaction (ORR) in alkaline solutions. Variation of the Fe/Co ratio resulted in a pronounced trend in the bifunctional ORR/OER activity. Controlled synthesis and in-depth characterization enabled the identification of an optimal Fe/Co composition, which afforded a low OER/OER reversible overvoltage of only 0.831V, taking the OER at 10 mA cm(-2) and the ORR at -1 mA cm(-2). Importantly, the optimal catalyst with a Fe/Co ratio of 2:3 exhibited very promising long-term stability with no evident change in the potential for both the ORR and the OER after 400 charge/discharge (OER/ORR) cycles at 15 mA cm(-2) in 6 m KOH. Moreover, detailed investigation of the structure, size, and phase composition of the mixed Fe/Co oxide nanoparticles, as well as their localization (inside of or on the surface of the MWCNTs) revealed insight of the possible contribution of the individual catalyst components and their synergistic interaction in the catalysis.

引用

页码：1204 / 1214

页数：11

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