Interfacial hot electron injection in Cu2O/MXene-g-C3N4 p-n heterojunction for efficient photocatalytic CO2 reduction - Details

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Abstract：

Photocatalytic　CO2　reduction　reaction　(CO2RR)　is　a　desired　solution　to　overcome　current　energy　and　environmental　problems.　As　a　main　competitive　reaction,　hydrogen　evolution　reaction　(HER)　urgently　needs　to　be　restrained　to　improve　the　conversion　rate　and　selectivity　of　CO2RR.　Here,　we　report　a　Cu2O/MXene-g-C3N4　(Cu2O/MX-CN)　p-n　heterojunction　that　achieves　highly　selective　CO2　reduction　of　93%　(competing　with　HER)　under　visible　light.　CO　is　the　only　product　of　CO2RR,　which　yielded　28.4　μmol　g−1　h−1.　The　introduction　of　Ti3C2　MXene　in　g-C3N4　promotes　the　energy　of　photoelectrons　and　the　transport　efficiency　of　photogenerated　carriers　at　the　p-n　heterojunction　interface　via　hot　electron　injection　induced　by　the　localized　surface　plasmonic　resonance　(LSPR)　and　band　structure　regulation.　Meanwhile,　apart　from　the　component　of　p-n　heterojunction,　Cu2O　also　acts　as　the　adsorption　site　of　CO2,　inhibiting　HER　by　blocking　the　adsorption　of　protons.　This　study　provides　a　novel　strategy　to　fabricate　multifunctional　composite　for　efficient　and　highly　selective　CO2　reduction.　©　2024　Elsevier　B.V.

Keyword：

CO2 Reduction Cu2O G-C3N4 Photocatalysis Ti3C2 MXene

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[ 1 ] [Gao Y.]Key Laboratory of Inorganic Synthetic and Applied Chemistry, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
[ 2 ] [Wang Y.]Key Laboratory of Inorganic Synthetic and Applied Chemistry, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
[ 3 ] [Wang Y.]State Key Lab of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 4 ] [Sun R.]Key Laboratory of Inorganic Synthetic and Applied Chemistry, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
[ 5 ] [Luo Y.]Key Laboratory of Inorganic Synthetic and Applied Chemistry, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
[ 6 ] [Xin L.]Key Laboratory of Inorganic Synthetic and Applied Chemistry, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
[ 7 ] [Wang D.]Key Laboratory of Inorganic Synthetic and Applied Chemistry, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China

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Interfacial hot electron injection in Cu2O/MXene-g-C3N4 p-n heterojunction for efficient photocatalytic CO2 reduction
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Source ：

Colloids and Surfaces A: Physicochemical and Engineering Aspects

ISSN： 0927-7757

Year： 2024

Volume： 684

4 . 9 0 0

JCR@2023

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SCOPUS Cited Count： 14

ESI Highly Cited Papers on the List： 0 Unfold All

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Chinese Cited Count：

30 Days PV： 2

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