Surface conductance analysis of X-MoS2 (X = Fe, Co, Ni) prepared on graphite felt as bifunctional catalysts for the hydrogen/oxidation evolution reactions. (20th January 2023)

• Record Type: Journal Article
• Authors: Shi, Huiyun; Zhang, Youyuan; Pang, Ning; Xu, Shaohui; Xiong, Dayuan; Wang, Lianwei; Yang, Pingxiong; Chu, Paul K.
• Is Part Of: Electrochimica acta. Volume 439(2023)
• Publication Date: 2023-01-20
• Subjects: Transition-metal-doped MoS2 -- HER/OER -- Surface adsorption -- Surface admittance; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2022.141596
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: The surface admittances calculated from electrochemical impedance spectra are used to analyze the surface states of X-MoS2 (X=Fe, Co, Ni) prepared on graphite felt. Because of the semiconducting properties of Fe-MoS2 at the electrolyte-semiconductor interface, the bifunctional catalytic properties in the hydrogen/oxidation evolution reactions (HER/OER) are enhanced as a result of better surface adsorption/desorption and slow-changing surface conductance. The surface morphology and electric field between the semiconductor and electrolyte are important parameters affecting the surface properties in HER/OER.