The mechanism of photodriven oxidation of CO over anatase and rutile TiO2 investigated from the hydrogen adsorption behavior - Details

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Abstract：

In　this　study,　the　reaction　mechanisms　of　photodriven　CO　oxidation　over　both　anatase　and　rutile　TiO2　have　been　investigated　from　the　hydrogen　adsorption　behavior.　It　can　be　beneficial　when　H2　is　introduced　into　CO　oxidation　system　to　increase　the　catalytic　activity　of　rutile,　while　to　decrease　the　catalytic　activity　of　anatase.　Further　analysis　revealed　that　H2　molecule　is　dissociated　on　anatase　surface,　and　then　produce　oxygen　vacancies　by　dehydroxylation　under　UV　irradiation.　In　contrast,　the　adsorbed　H2　(H2　(ads))　with　a　non-dissociative　mode　does　not　activate　the　lattice　oxygen　(Olat)　over　rutile.　For　anatase,　CO　oxidation　reaction　mainly　undergoes　the　Olat　activation　process,　while　H2　(ads)　can　inhibit　the　Olat　activation,　resulting　in　a　suppressed　CO　oxidation.　For　rutile,　the　surface　hydroxyls　are　the　active　species　for　CO　oxidation,　while　H2　(ads)　can　promote　to　form　more　surface　hydroxyl　species,　resulting　in　a　promoted　CO　oxidation.　©　2020　Elsevier　B.V.

Keyword：

Isotope labeling; Light-driven CO oxidation; Photo-assisted gas response; Surface lattice oxygen; TiO2

Community：

[ 1 ] [Wang, Z.]Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350002, China
[ 2 ] [Wang, Z.]Key Laboratory of Eco-materials Advanced Technology (Fuzhou University), Fujian Province University, Fuzhou, 350002, China
[ 3 ] [Wang, X.]Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350002, China
[ 4 ] [Wang, X.]Key Laboratory of Eco-materials Advanced Technology (Fuzhou University), Fujian Province University, Fuzhou, 350002, China
[ 5 ] [Wang, H.]Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350002, China
[ 6 ] [Wang, H.]Key Laboratory of Eco-materials Advanced Technology (Fuzhou University), Fujian Province University, Fuzhou, 350002, China
[ 7 ] [Chen, X.]Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350002, China
[ 8 ] [Dai, W.]Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350002, China
[ 9 ] [Dai, W.]Key Laboratory of Eco-materials Advanced Technology (Fuzhou University), Fujian Province University, Fuzhou, 350002, China
[ 10 ] [Fu, X.]Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350002, China

Reprint 's Address：

[Dai, W.]Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou UniversityChina

Email：

daiwenxin@fzu.edu.cn

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Source ：

Applied Catalysis B: Environmental

ISSN： 0926-3373

Year： 2020

Volume： 277

1 9 . 5 0 3

JCR@2020

2 0 . 3 0 0

JCR@2023

ESI HC Threshold：160

JCR Journal Grade：1

CAS Journal Grade：1

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WoS CC Cited Count：

SCOPUS Cited Count： 28

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 1

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