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Title: Decoration of Ag nanoparticles on CoMoO4 rods for efficient electrochemical reduction of CO2
Hydrothermal and photoreduction/deposition methods were used to fabricate Ag nanoparticles (NPs) decorated CoMoO4rods. Improvement of charge transfer and transportation of ions by making heterostructure was proved by cyclic voltammetry and electrochemical impedance spectroscopy measurements. Linear sweep voltammetry results revealed a fivefold enhancement of current density by fabricating heterostructure. The lowest Tafel slope (112 mV/dec) for heterostructure compared with CoMoO4(273 mV/dec) suggested the improvement of electrocatalytic performance. The electrochemical CO2reduction reaction was performed on an H-type cell. The CoMoO4electrocatalyst possessed the Faraday efficiencies (FEs) of CO and CH4up to 56.80% and 19.80%, respectively at  − 1.3 V versus RHE. In addition, Ag NPs decorated CoMoO4electrocatalyst showed FEs for CO, CH4, and C2H6were 35.30%, 11.40%, and 44.20%, respectively, at the same potential. It is found that CO2reduction products shifted from CO/CH4to C2H6when the Ag NPs deposited on the CoMoO4electrocatalyst. In addition, it demonstrated excellent electrocatalytic stability after a prolonged 25 h amperometric test at  − 1.3 V versus RHE. It can be attributed to a synergistic effect between the Ag NPs and CoMoO4rods. This study highlights the cooperation between Ag NPs on CoMoO4components and provides new insight into the design of heterostructure as an efficient, stable catalyst towards electrocatalytic reduction of CO2to CO, CH4, and C2H6products.  more » « less
Award ID(s):
2100710
PAR ID:
10527275
Author(s) / Creator(s):
; ; ;
Corporate Creator(s):
Editor(s):
Marszalek, R
Publisher / Repository:
Scientific Reports
Date Published:
Journal Name:
Scientific Reports
Volume:
14
Issue:
1
ISSN:
2045-2322
Page Range / eLocation ID:
1406
Subject(s) / Keyword(s):
CO2 Reduction
Format(s):
Medium: X Size: 2 MB Other: Text
Size(s):
2 MB
Sponsoring Org:
National Science Foundation
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