Thermo-driven photocatalytic CO2 hydrogenation over NiOx/Nb2O5 via regulating the electron transfer behavior of reactant gas adsorption - Details

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Abstract：

Thermo-driven　photocatalytic　CO2　hydrogenation　is　studied　for　NiOx/Nb2O5　from　the　point　of　CO2　and　H2　adsorption　behavior.　Photothermal　synergistic　and　Ni　modification　dramatically　changed　the　electron　transfer　behavior　of　CO2　adsorption　(CO2　(ads))　and　H2　(ads)　via　regulating　Fermi　level　and　providing　Ni0　and　VOs　adsorption　sites,　respectively.　The　H2　(ads)　at　Ni0　site　donates　electrons　to　NiOx/Nb2O5　(pre-oxidized)　and　CO2　(ads)　at　VOs-Nb5+　or　Ni0　site　accepts　electrons　from　NiOx/Nb2O5　(pre-reduced),　while　NiOx/Nb2O5　displayed　excellent　photocatalytic　activities.　Furthermore,　in　situ　DRIFTS　results　suggested　that　CO2　(ads)　will　form　two　reaction　pathways:　(1)　CO2　(ads)　at　Ni0　site　directly　hydrogenated　with　H　atoms　(H2　molecule　dissociates　at　Ni0　to　form　two　H-atoms)　to　generate　CH4　and　C2H6　through　COOH　intermediate;　(2)　CO2　(ads)　form　dimer　CO2　·　CO2δ−　species　at　VOs-Nb5+　site,　and　it　will　be　further　disproportioned　to　produce　CO　and　CO3δ−　species,　then　CO3δ−　species　are　gradually　hydrogenated　to　form　CH4　and　C2H6.　Moreover,　increasing　the　number　of　CO2/H2　molecules　accepts/donates　electrons　will　also　improve　the　reduction　degree　of　CO2.　This　work　offers　a　new　explanation　for　photothermal　synergistic.　©　2022　Elsevier　B.V.

Keyword：

Adsorption behavior of CO2 and H2; CO2 hydrogenation; Electron transfer; Reaction pathways; Thermo-driven photocatalysis

Community：

[ 1 ] [Wang, Z.]Key Laboratory of Eco-materials Advanced Technology, College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China
[ 2 ] [Wang, Z.]Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350108, China
[ 3 ] [Wang, Z.]Qingyuan Innovation Laboratory, Quanzhou, 362801, China
[ 4 ] [Xiao, M.]Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350108, China
[ 5 ] [Xiao, M.]Qingyuan Innovation Laboratory, Quanzhou, 362801, China
[ 6 ] [Wang, X.]Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350108, China
[ 7 ] [Wang, X.]Qingyuan Innovation Laboratory, Quanzhou, 362801, China
[ 8 ] [Wang, H.]Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350108, China
[ 9 ] [Wang, H.]Qingyuan Innovation Laboratory, Quanzhou, 362801, China
[ 10 ] [Chen, X.]Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350108, China
[ 11 ] [Dai, W.]Key Laboratory of Eco-materials Advanced Technology, College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China
[ 12 ] [Dai, W.]Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350108, China
[ 13 ] [Dai, W.]Qingyuan Innovation Laboratory, Quanzhou, 362801, China
[ 14 ] [Yu, Y.]Key Laboratory of Eco-materials Advanced Technology, College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China
[ 15 ] [Fu, X.]Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350108, China

Reprint 's Address：

[Dai, W.]Key Laboratory of Eco-materials Advanced Technology, China

Email：

daiwenxin@fzu.edu.cn

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Source ：

Applied Surface Science

ISSN： 0169-4332

Year： 2022

Volume： 592

6 . 7

JCR@2022

6 . 3 0 0

JCR@2023

ESI HC Threshold：91

JCR Journal Grade：1

CAS Journal Grade：2

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WoS CC Cited Count：

SCOPUS Cited Count： 19

ESI Highly Cited Papers on the List： 0 Unfold All

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Chinese Cited Count：

30 Days PV： 0

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