Fe40Co40Se20 Glassy Films Supported on Carbon Fiber Paper as Electrocatalysts in the Oxygen Evolution Reaction. Issue 10 (17th June 2019)

• Record Type: Journal Article
• Authors: Lu, Shuqiang; Lian, Jun; Zhang, Fabao; Jiang, Wei; Hu, Qingzhuo; Li, Dongdong; Zhang, Bo
• Is Part Of: Journal of the Electrochemical Society. Volume 166:Issue 10(2019)
• Page Start: F620
• Page End: F626
• Publication Date: 2019-06-17
• Subjects: Electrocatalysis -- electrocatalysts -- thin films -- vacuum magnetron sputtering; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.1101910jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : We report a type of transition metal selenide (Fe40 Co40 Se20 ) thin films supported on carbon fiber paper (CFP) (Fe40 Co40 Se20 /CFP) and study the effects of the substrate temperature during thin film deposition on the electrocatalytic performance of the films in the oxygen evolution reaction. Fe40 Co40 Se20 /CFP thin films were deposited by vacuum magnetron sputtering at substrate temperatures of 308, 393, and 573 K. In 1 M KOH, the amorphous film deposited at 393 K exhibited better comprehensive electrocatalytic activity and stability than that of the Fe40 Co40 Se20 /CFP thin films deposited under other conditions, achieving a low overpotential of 307 mV at a current density of 10 mA cm −2 and low Tafel slope of 35 mV dec −1 . These results reveal that an appropriate substrate temperature during film formation improves the catalytic performance of thin film catalysts to some extent. A combination of low charge resistance and large electrochemically active surface area contributes to the electrocatalytic performance of the Fe40 Co40 Se20 /CFP thin films.