DataVXACS Energy LettersPaper
journal article·2019-06-14

Cation Vacancy-Initiated CO2 Photoreduction over ZnS for Efficient Formate Production

Hong Pang, Xianguang Meng, Peng Li, Kun Chang, Wei Zhou, Xin Wang, Xueliang Zhang, Wipakorn Jevasuwan, Naoki Fukata, Defa Wang, Jinhua Ye

ACS Energy Letters· Volume 4· Issue 6
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Source abstract

Abstract

Vacancies have been demonstrated to be significant for CO2 reduction reaction (CO2RR) over ZnS, but anion vacancies were easily refilled with oxygen species and could work as both H2 and CO evolution sites, aggravating the competition between hydrogen evolution reaction (HER) and CO2RR. In this study, cation vacancies (VZn) were proposed as new active sites on the ZnS surface. With no cocatalyst, the VZn-rich ZnS acquired a high selectivity of formate production (>85%) in inorganic aqueous solution. In situ attenuated total reflection-infrared (ATR-IR) spectroscopy and first-principle calculations have clarified the CO2RR pathways into formate and proved that the surface VZn could greatly lower the barrier of CO2RR and suppress the proton adsorption, elucidating the origin of the highly selective CO2RR in the presence of competitive HER. This work gives an in-depth understanding of the cation vacancies and inspiration to develop efficient photocatalysts.
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Research context

Catalysis & surfaces

OpenAlex topics: Advanced Photocatalysis Techniques · CO2 Reduction Techniques and Catalysts · Copper-based nanomaterials and applications

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

Affiliations

International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan

Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0814, Japan

Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology, Tangshan 063210, People’s Republic of China

Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies, Department of Applied Chemistry, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, People’s Republic of China

Department of Applied Physics, Tianjin Key Laboratory of Low Dimensional Materials Physics, Preparing Technology Faculty of Science, Tianjin University, Tianjin 300072, People’s Republic of China

TJU-NIMS International Collaboration Laboratory, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, People’s Republic of China

Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, People’s Republic of China

Funding

Hokkaido University · Natural Science Foundation of Hebei Province · Ministry of Science and Technology of the People's Republic of China · Ministry of Education, Culture, Sports, Science and Technology · Natural Science Foundation of Jiangsu Province · Japan Society for the Promotion of Science · National Natural Science Foundation of China

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