DataVXACS Energy LettersPaper
journal article·2020-02-14

Tuning Oxygen Vacancies of Oxides to Promote Electrocatalytic Reduction of Carbon Dioxide

Lulu Li, Zhi-Jian Zhao, Congling Hu, Piaoping Yang, Xintong Yuan, Yanan Wang, Lei Zhang, Lyudmila Moskaleva, Jinlong Gong

ACS Energy Letters· Volume 5· Issue 2
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Source abstract

Abstract

Tin oxide (SnOx) has emerged as a promising metal oxide catalyst for the CO2 reduction reaction (CO2RR) into value-added chemicals such as formic acid/formate. However, the improvement of SnOx catalytic performance is hindered by its complex surface structures and limited knowledge about the nature of the active sites. This Letter describes the critical role of oxygen vacancies (Ov) in partially reduced SnO2(110) for CO2RR selectivity by combined theoretical and experimental studies. The SnOx with moderate content of Ov is the most active surface and can suppress the undesirable hydrogen evolution reaction simultaneously. This is also confirmed by the electrochemical experiments that also demonstrate that the selectivity of HCOOH changes with varied content of Ov. Further electronic structure analysis reveals that the bond strength and charge transfer between HCOO* and the active site can be regulated by varying the content of Ov, so that the adsorption strength of HCOO* can be tuned.
Source: openalex_inverted_index · Quality: baseline

Research context

Catalysis & surfaces

OpenAlex topics: CO2 Reduction Techniques and Catalysts · Electrocatalysts for Energy Conversion · Ionic liquids properties and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China

Department of Chemistry, University of the Free State, P.O. Box 339, Bloemfontein 9301, South Africa

Institute of Applied and Physical Chemistry and Center for Environmental Research and Sustainable Technology, University of Bremen, Bremen 28359, Germany

Funding

State Administration of Foreign Experts Affairs · Ministry of Education of the People's Republic of China · Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China

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