Hierarchical CuS@ZnIn2S4 Hollow Double-Shelled p-n Heterojunction Octahedra Decorated with Fullerene C60 for Remarkable Selectivity and Activity of CO2 Photoreduction into CH4

Yi Ding; Yajie Chen; Zefeng Guan; Yumeng Zhao; Jing Lin; Yuzhen Jiao; Guohui Tian

doi:10.1021/acsami.1c20980

Hierarchical CuS@ZnIn₂S₄ Hollow Double-Shelled p-n Heterojunction Octahedra Decorated with Fullerene C₆₀ for Remarkable Selectivity and Activity of CO₂ Photoreduction into CH₄

ACS Appl Mater Interfaces. 2022 Feb 16;14(6):7888-7899. doi: 10.1021/acsami.1c20980. Epub 2022 Feb 2.

Authors

Yi Ding¹, Yajie Chen¹, Zefeng Guan¹, Yumeng Zhao¹, Jing Lin¹, Yuzhen Jiao¹, Guohui Tian¹

Affiliation

¹ Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, P. R. China.

PMID: 35107251
DOI: 10.1021/acsami.1c20980

Abstract

In this work, a hollow double-shelled architecture, based on n-type ZnIn₂S₄ nanosheet-coated p-type CuS hollow octahedra (CuS@ZnIn₂S₄ HDSOs), is designed and fabricated as a p-n heterojunction photocatalyst for selective CO₂ photoreduction into CH₄. The resulting hybrids provide rich active sites and effective charge migration/separation to drive CO₂ photoreduction, and meanwhile, CO detachment is delayed to increase the possibility of eight-electron reactions for CH₄ production. As expected, the optimized CuS@ZnIn₂S₄ HDSOs manifest a CH₄ yield of 28.0 μmol g^-1 h^-1 and a boosted CH₄ selectivity up to 94.5%. The decorated C₆₀ both possesses high electron affinity and improves catalyst stability and CO₂ adsorption ability. Thus, the C₆₀-decorated CuS@ZnIn₂S₄ HDSOs exhibit the highest CH₄ evolution rate of 43.6 μmol g^-1 h^-1 and 96.5% selectivity. This work provides a rational strategy for designing and fabricating efficient heteroarchitectures for CO₂ photoreduction.

Keywords: CO2 photoreduction; CuS@ZnIn2S4; hollow double-shelled octahedra; p−n heterojunction; selectivity.