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Efficient CO 2 Electroreduction on Ag 2 S Nanodots Modified CdS Nanorods as Cooperative Catalysts
Author(s) -
Cheng Ling,
Wang Yating,
Li Yuhang,
Shen Yi,
Zhen Yue,
Xing Zhanqi,
Lin Liwan,
Chen Aiping,
Zhu Yihua,
Li Chunzhong
Publication year - 2021
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.202001740
Subject(s) - nanorod , nanodot , faraday efficiency , catalysis , materials science , chalcogenide , aqueous solution , chemical engineering , electrolyte , current density , electrochemistry , nanotechnology , electrocatalyst , inorganic chemistry , chemistry , electrode , optoelectronics , biochemistry , engineering , physics , quantum mechanics
CdS nanorods have been regarded as a promising candidate for electrocatalytic CO 2 reduction compared with other chalcogenide catalysts, owing to the high Faradaic efficiency for producing CO in aqueous electrolyte. Unfortunately, the CO generation rate of the bare CdS is relatively low due to the poor intrinsic activity. In this work, we modify the surface of CdS nanorods by Ag 2 S nanodots to promote the CO 2 reduction activity. With 5 wt % loading of Ag 2 S nanodots, we achieve the highest CO partial current density of 10.6 mA cm −2 at an applied potential of −1.1 V vs RHE, 11 % and 93 % enhancement compared to the separately synthesized CdS and Ag 2 S, respectively. When using flow cell to accelerate the CO 2 mass transfer, the cooperative catalyst realizes ∼95 % Faradaic efficiency for C 1 products with a fast CO 2 reduction rate at a current density of 200 mA cm −2 .