Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 14, Issue 18, Pages 20368-20374Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c15669
Keywords
carbon dioxide electroreduction; interface structure; zinc oxide; zinc sulfide; electrochemical performance
Funding
- National Natural Science Foundation of China [22172009, 22002158]
- National Scientific Fund of Liaoning Province [20180510035]
- CAS Youth Innovation Promotion [Y201938]
- Excellent Youth Project of the Natural Science Foundation of Heilongjiang Province [YQ2019B002]
- Fundamental Research Funds for the Central Universities
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In this study, a stable ZnS/ZnO interface structure was constructed by embedding ZnS nanoparticles onto the ZnO surface to enhance the performance and stability of CO2 electroreduction. The ZnS/ZnO interface exhibited a high maximum current density and CO Faradaic efficiency, remaining stable over a long period of time, demonstrating a promising catalyst for CO2 electroreduction.
Carbon dioxide (CO2) electroreduction can offer a way of relieving environmental and energy issues. Gold and silver catalysts show considerable electrochemical performance for CO production; however, the electrochemical CO2 conversion to CO is still restricted by the Faradaic efficiency, current density, and stability over the catalysts. Non-noble metal (zinc) is considered as a promising catalyst for CO2 electroreduction because of its low cost. However, because of the electron-rich property of zinc, it has zno a weak adsorption capacity of intermediates, resulting in a poor CO2 electroreduction performance. In this work, ZnS nano- particles are embedded onto the ZnO surface to construct a stable ZnS/ZnO interface structure. The ZnS/ZnO interface reaches a maximum current density of 327.2 +/- 10.6 mA cm(-2) with a CO Faradaic efficiency of 91.9 +/- 0.6% at -0.73 V vs a reversible hydrogen electrode (RHE) and remains stable for 40 h at a current density of 115.7 +/- 7.0 mA cm(-2) with a CO Faradaic efficiency of 93.8 +/- 3.7% at -0.56 V vs RHE.
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