Shell thickness controlled core–shell Fe3O4@CoO nanocrystals as efficient bifunctional catalysts for the oxygen reduction and evolution reactions. Issue 4 (17th December 2018)

• Record Type: Journal Article
• Authors: Zhou, Lingshan; Deng, Binglu; Jiang, Zhongqing; Jiang, Zhong-Jie
• Is Part Of: Chemical communications. Volume 55:Issue 4(2019)
• Page Start: 525
• Page End: 528
• Publication Date: 2018-12-17
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c8cc09140d
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : Core–shell Fe3 O4 @CoO NCs have been demonstrated to be efficient catalysts for ORR and OER. The specific core/shell interaction can be ascribed to the main reason leading to their high catalytic performance. The shell thickness has a great influence on the catalytic activities. Abstract : Core–shell Fe3 O4 @CoO NCs have been demonstrated to be efficient bifunctional catalysts for the oxygen reduction (ORR) and evolution (OER) reactions. Their activities are strongly shell thickness dependent. Specifically, nanocrystals with ∼2 monolayers of CoO can exhibit a potential difference of 0.794 V at OER and ORR current densities of 10 and −3 mA cm −2, respectively. This value is competitive to those of most active bifunctional catalysts reported. In addition, they are also used as the oxygen cathode for Zn–air batteries and can deliver a peak power density of 109 mW cm −2, much higher than that of the Pt–RuO2 /C (88.1 mW cm −2 ).