能源化学(英文) ›› 2017, Vol. 26 ›› Issue (5): 936-941.DOI: 10.1016/j.jechem.2017.03.013

• ARTICLES • 上一篇    下一篇

Mechanism study of reduction of CO2 into formic acid by in-situ hydrogen produced from water splitting with Zn:Zn/ZnO interface autocatalytic role

Yi Lea, Heng Zhongb, Yang Yanga, Runtian Hea, Guodong Yaoa, Fangming Jina,c   

  1. a School of Environmental Science and Engineering, State Key Lab of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China;
    b Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology(AIST), Nigatake 4-2-1, Miyagino-ku, Sendai 983-8551, Japan;
    c Graduate School of Environmental Studies, Tohoku University, Aoba-ku, Sendai 980-8579, Japan
  • 收稿日期:2017-02-13 修回日期:2017-03-22 出版日期:2017-09-15 发布日期:2017-11-10
  • 通讯作者: Guodong Yao,E-mail addresses:geode@sjtu.edu.cn;Fangming Jin,E-mail addresses:fmjin@sjtu.edu.cn
  • 基金资助:

    The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (No. 21277091 & 51472159), the State Key Program of National Natural Science Foundation of China (No. 21436007), the Key Basic Research Projects of Science and Technology Commission of Shanghai (No. 14JC1403100) and the Chenxing-SMG Young Scholar Project of Shanghai Jiao Tong University.

Mechanism study of reduction of CO2 into formic acid by in-situ hydrogen produced from water splitting with Zn:Zn/ZnO interface autocatalytic role

Yi Lea, Heng Zhongb, Yang Yanga, Runtian Hea, Guodong Yaoa, Fangming Jina,c   

  1. a School of Environmental Science and Engineering, State Key Lab of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China;
    b Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology(AIST), Nigatake 4-2-1, Miyagino-ku, Sendai 983-8551, Japan;
    c Graduate School of Environmental Studies, Tohoku University, Aoba-ku, Sendai 980-8579, Japan
  • Received:2017-02-13 Revised:2017-03-22 Online:2017-09-15 Published:2017-11-10
  • Contact: Guodong Yao,E-mail addresses:geode@sjtu.edu.cn;Fangming Jin,E-mail addresses:fmjin@sjtu.edu.cn
  • Supported by:

    The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (No. 21277091 & 51472159), the State Key Program of National Natural Science Foundation of China (No. 21436007), the Key Basic Research Projects of Science and Technology Commission of Shanghai (No. 14JC1403100) and the Chenxing-SMG Young Scholar Project of Shanghai Jiao Tong University.

摘要: We have previously developed a new process of highly efficient conversion of CO2 and water into formic acid with metallic Zn without the addition of catalyst, however, its mechanism is not clear, particularly in the catalytic role of Zn/ZnO interface. Herein, the autocatalytic role of Zn/ZnO interface formed in situ during the reduction of CO2 into formic acid with Zn in water was studied by combining high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) techniques and experimental data. The electron microscope results show that possible defects or dislocations formed on Zn/ZnO interface, in which plays a key role for ZnH-formation. Further XPS analyses indicate that oxygen vacancies on Zn/ZnO interface increased at short reaction times (less than 10 min). These analyses and experimental results suggest that a highly efficient and rapid conversion of CO2 and water into formic acid should involve an autocatalytic role of the Zn/ZnO interface formed in situ, particularly at the beginning of the reaction.

关键词: Mechanism, CO2 reduction, Zinc, Water dissociation, Interface catalysis

Abstract: We have previously developed a new process of highly efficient conversion of CO2 and water into formic acid with metallic Zn without the addition of catalyst, however, its mechanism is not clear, particularly in the catalytic role of Zn/ZnO interface. Herein, the autocatalytic role of Zn/ZnO interface formed in situ during the reduction of CO2 into formic acid with Zn in water was studied by combining high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) techniques and experimental data. The electron microscope results show that possible defects or dislocations formed on Zn/ZnO interface, in which plays a key role for ZnH-formation. Further XPS analyses indicate that oxygen vacancies on Zn/ZnO interface increased at short reaction times (less than 10 min). These analyses and experimental results suggest that a highly efficient and rapid conversion of CO2 and water into formic acid should involve an autocatalytic role of the Zn/ZnO interface formed in situ, particularly at the beginning of the reaction.

Key words: Mechanism, CO2 reduction, Zinc, Water dissociation, Interface catalysis