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Tailoring crystal facet microenvironments for simultaneous electrochemical ozone and hydrogen peroxide production |
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| Authors: | Xiaosa Wang Jiayuan Li Lei Ding Huaijie Shi Jia Liu Xinying Yang Min Li Xing Zhong Zihao Yao Jianguo Wang |
| Affiliation: | 1. Institute of Industrial Catalysis, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, China Contribution: Conceptualization (lead), Data curation (lead), Investigation (lead), Methodology (lead), Resources (lead), Software (lead), Validation (lead), Visualization (lead), Writing - original draft (lead), Writing - review & editing (lead);2. Institute of Industrial Catalysis, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, China Contribution: Software (equal), Writing - original draft (equal), Writing - review & editing (equal);3. Institute of Industrial Catalysis, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, China Contribution: Validation (supporting), Visualization (supporting), Writing - original draft (supporting);4. Institute of Industrial Catalysis, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, China Contribution: Validation (supporting), Visualization (supporting);5. Institute of Industrial Catalysis, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, China |
| Abstract: | Developing a bifunctional electrocatalyst that can effectively produce O3 and H2O2 is significant for the electrochemical synthesis of O3 and H2O2 for the synergistic oxidative degradation of organic pollutants. In this study, SnO with various exposed facets was synthesized by tailoring the crystal facet microenvironment for oxygen intermediates adsorption for electrochemical ozone production (EOP) and two-electron oxygen reduction reaction (2e− ORR). The Faraday efficiency of SnO-1 with a high (110) facet ratio for O3 was 22.0%, while SnO-4 with a high (002) facet ratio achieved a selectivity of 93.6% for H2O2. The theoretical calculation indicates that their excellent performances originated from the strong adsorption of the (110) facet on O* and O2* and the suitable adsorption and desorption strength of the (002) facet on OOH*, respectively. This study provides an attractive strategy for the development of a bifunctional electrocatalyst for advanced electrochemical oxidation by tailoring the crystal facet microenvironment. |
| Keywords: | crystal facet electrochemical ozone production electrodegradation microenvironments oxygen reduction reaction |