期刊
CATALYSIS TODAY
卷 357, 期 -, 页码 259-268出版社
ELSEVIER
DOI: 10.1016/j.cattod.2019.02.047
关键词
Bifunctional electrocatalyst; Oxygen reduction reaction; Oxygen evolution reaction; Fe-Co-Ni oxide nanoparticles; Oxidized multi-walled carbon nanotubes
资金
- Russian Foundation for Basic Research [16-32-60046 mol_a_dk]
- Deutscher Akademischer Austauschdienst (DAAD)
- Consejo Nacional de Ciencia y Tecnologia (CONACyT)
- Deutsche Forschungsgemeinschaft (DFG) [CRC/TRR 247]
- Ministry of Science and Higher Education of the Russian Federation [AAAA-A17-117041710085-9]
Fabrication of efficient and cost-effective bifunctional oxygen electrocatalysts for both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) remains a challenge for the development of rechargeable metal-air batteries and unitized regenerative fuel cells technologies. Herein, we report high-performance bifunctional ORR/OER electrocatalysts consisting of mixed transition metal (Fe, Co, Ni) oxide nanoparticles supported on oxidized multi-walled carbon nanotubes (MWCNT). Investigation of the ORR and OER activity of samples with different metal compositions showed that trimetallic/MWCNT composites having Fe:Ni:Co = x:x:(1-2x) ratios, with 0.25 <= x <= 0.4, exhibit highest bifunctional activity in terms of the reversible ORR/OER overvoltage at a given current density. Moreover, the trimetallic catalysts exhibited improved selectivity with respect to the reduction of O-2 to OH- compared to the bimetallic Fe-Ni, Fe-Co and Co-Ni catalysts, thus revealing synergistic interactions among the metal oxide components. Correlation of the electrocatalytic activity with the structure of the composites is discussed for the most representative cases.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据