Volume 8 Issue 3
Jul.  2023
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Article Navigation >  Green Energy&Environment  > 2023  >  8(3): 831-841
Guanyu Mu, Yan Zeng, Yong Zheng, Yanning Cao, Fujian Liu, Shijing Liang, Yingying Zhan, Lilong Jiang. Oxygen vacancy defects engineering on Cu-doped Co3O4 for promoting effective COS hydrolysis. Green Energy&Environment, 2023, 8(3): 831-841. doi: 10.1016/j.gee.2021.11.001
Citation: Guanyu Mu, Yan Zeng, Yong Zheng, Yanning Cao, Fujian Liu, Shijing Liang, Yingying Zhan, Lilong Jiang. Oxygen vacancy defects engineering on Cu-doped Co3O4 for promoting effective COS hydrolysis. Green Energy&Environment, 2023, 8(3): 831-841. doi: 10.1016/j.gee.2021.11.001
shu

Oxygen vacancy defects engineering on Cu-doped Co3O4 for promoting effective COS hydrolysis

doi: 10.1016/j.gee.2021.11.001

  • a. National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian, 350002, China;

  • b. Qingyuan Innovation Laboratory, Quanzhou, Fujian, 362801, China

Funds:

The authors gratefully acknowledge the National Natural Science Foundation of China (92034301, 22078063 and 22022804), Major Program of Qingyuan Innovation Laboratory (00121003) and the Natural Science Foundation of Fujian Province (2020H6007).

  • Received date 16 September 2021, Accepted date 23 November 2021, RevRecd date 22 November 2021, Available online 17 May 2023, Publish date 31 July 2023,
    Abstract
  • The activation of H2O is a key step of the COS hydrolysis, which may be tuned by oxygen vacancy defects in the catalysts. Herein, we have introduced Cu into Co3O4 to regulate the oxygen vacancy defect content of the catalysts. In situ DRIFTS and XPS spectra reveal that COS and H2O are adsorbed and activated by oxygen vacancy. The 10 at% Cu doped Co3O4 sample (10CuCo3O4) exhibits the optimal activity, 100% of COS conversion at 70 ℃. The improved oxygen vacancies of CuCo3O4 accelerate the activation of H2O to form active OH. COS binds with hydroxyl to form the intermediate HSCO2-, and then the activated -OH on the oxygen vacancy reacts with to form . Meanwhile, the catalyst exhibits high catalytic stability because copper species (Cu+/Cu2+) redox cycle mitigate the sulfation of Co3O4 (Co2+/Co3+). Our work offers a promising approach for the rational design of cobalt-related catalysts in the highly efficient hydrolysis COS process.

     

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