2D ultrathin CoP modified MnxCd1−xS with controllable band structure and robust photocatalytic performance for hydrogen generation. Issue 39 (25th September 2019)

• Record Type: Journal Article
• Authors: Chen, Ran; Ao, Yanhui; Wang, Chao; Wang, Peifang
• Is Part Of: Dalton transactions. Volume 48:Issue 39(2019)
• Page Start: 14783
• Page End: 14791
• Publication Date: 2019-09-25
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c9dt02849h
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Considerable efforts have been directed towards constructing high-efficiency, earth-abundant and low-cost photocatalysts for hydrogen evolution under visible light irradiation. Abstract : Considerable efforts have been directed towards constructing high-efficiency, earth-abundant and low-cost photocatalysts for hydrogen evolution under visible light irradiation. In this work, 2D ultrathin CoP-decorated bimetallic Mn x Cd1− x S photocatalysts were developed based on the combined strategies of controllable band structure and co-catalyst modification. An optimal H2 production rate of 65 324 μmol g −1 h −1 was obtained for the Mn0.5 Cd0.5 S/CoP-4% sample under visible light irradiation, which was 4.26 times higher than that of pure Mn0.5 Cd0.5 S as well as 38.7 times that of pure CdS. UV-vis and MS characterization results showed that the introduction of Mn into CdS could change the band potential towards a more negative direction, which would be beneficial for water reduction. Moreover, the added CoP could act as a co-catalyst to facilitate the electron transfer and restrain the recombination of photogenerated electron–hole pairs, which was testified by photocurrent, PL and EIS analyses. This work paves the way to offer a new direction towards designing efficient photocatalysts for hydrogen evolution.