Controllable Synthesis of Cobalt Monoxide Nanoparticles and the Size-Dependent Activity for Oxygen Reduction Reaction
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- 作者：Jing Liu ; Luhua Jiang ; Bingsen Zhang ; Jutao Jin ; Dang Sheng Su ; Suli Wang ; Gongquan Sun
- 刊名：ACS Catalysis
- 出版年：2014
- 出版时间：September 5, 2014
- 年：2014
- 卷：4
- 期：9
- 页码：2998-3001
- 全文大小：325K
- ISSN：2155-5435
文摘
In this work, carbon-supported cobalt monoxides with an average size of 3.5, 4.9, and 6.5 nm are synthesized via a facile colloidal method avoiding any surfactants of long chains. Along with controlling the CoO particle size, we investigate the dependence of ORR activity on particle size of the CoO/C composite. It is discovered that the turnover frequency of the ORR per CoO site is largely independent of the particle size in the range of 3鈥? nm, and the enhanced ORR activity for the smaller CoO particles is attributed to the enlarged interface between CoO and carbon.