Oxygen vacancy-rich nitrogen-doped Co3O4 nanosheets as an efficient water-resistant catalyst for low temperature CO oxidation

Chaochuang Yin; Yanan Liu; Qineng Xia; Shifei Kang; Xi Li; Yangang Wang; Lifeng Cui

doi:10.1016/j.jcis.2019.06.046

Oxygen vacancy-rich nitrogen-doped Co₃O₄ nanosheets as an efficient water-resistant catalyst for low temperature CO oxidation

J Colloid Interface Sci. 2019 Oct 1:553:427-435. doi: 10.1016/j.jcis.2019.06.046. Epub 2019 Jun 15.

Authors

Chaochuang Yin¹, Yanan Liu², Qineng Xia², Shifei Kang¹, Xi Li², Yangang Wang³, Lifeng Cui⁴

Affiliations

¹ Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
² College of Biological Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, China.
³ College of Biological Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, China. Electronic address: ygwang8136@mail.zjxu.edu.cn.
⁴ Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China. Electronic address: lifeng.cui@gmail.com.

PMID: 31228757
DOI: 10.1016/j.jcis.2019.06.046

Abstract

Over the past decade, there has been significant research of Co₃O₄ catalysts for oxidation of carbon mono-oxide (CO) at low temperatures. However, development of water-resistant Co₃O₄ materials is still challenging. In this work, a novel oxygen vacancy-rich nitrogen-doped Co₃O₄ catalyst was developed using straightforward urea-assisted method. Nitrogen doping increases oxygen vacancies on the surface in Co₃O₄ as well as improves the activity of lattice oxygen. Comparing with pure Co₃O₄ and Co₃O₄ with less nitrogen doping, the as-synthesized nitrogen-doped Co₃O₄ exhibited significantly enhanced activity as well as water resistance in the catalytic oxidation of CO. To the best of our knowledge, this is the first example of CO oxidation on N-doped Co₃O₄, which provides a new strategy for developing highly active and water-resistant catalysts.

Keywords: CO oxidation; Nitrogen-doped Co(3)O(4); Oxygen vacancy-rich; Urea-assisted method; Water resistance.