More efficiently enhancing photocatalytic activity by embedding Pt within anatase–rutile TiO2 heterophase junction than exposing Pt on the outside surface - Details

author：

Indexed by：

Scopus

Abstract：

Loading　noble　metal　on　the　surface　has　been　widely　used　to　improve　photocatalytic　activity　of　semiconductor　photocatalyst.　Here,　Pt-embedded　anatase　(A)-rutile　(R)　TiO2　junction　photocatalyst　(A/Pt/R)　was　found　to　show　much　more　efficient　photocatalytic　H2　evolution　activity　than　the　other　TiO2　photocatalysts　loading　Pt　on　the　outside　surface　(such　as　Pt/A/R,　Pt/A,　Pt/R　and　Pt/P25),　although　the　as-embedded　Pt　is　unreachable　to　reactants.　The　A/Pt/R　sample　shows　a　photocatalytic　H2　evolution　rate　as　high　as　17.9　mmol⋅gcat−1⋅h−1,　which　is　27.2　and　2.5　times　higher　than　the　common　A/R　and　Pt/A/R　samples,　respectively.　The　traditional　theory　fails　to　explain　the　unexpected　high　photoactivity.　The　reverse　tandem　Schottky　junction　is　suggested　to　be　possibly　responsible　for　the　high　photoactivity　of　A/Pt/R,　which　allows　the　photogenerated　electrons　to　transfer　more　swimmingly　from　rutile　to　anatase　than　the　common　A/R　phasejunction.　This　finding　provides　a　new　strategy　for　further　promoting　photocatalytic　activity　of　Pt/TiO2　and　other　heterophase　or　heterojunction　photocatalysts.　©　2019　Elsevier　Inc.

Keyword：

Anatase–rutile heterophase junction; Charge separation; Photocatalysis; Pt/TiO2; Schottky junction

Community：

[ 1 ] [Lin, J.]State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, College of Chemistry, Fuzhou University, China
[ 2 ] [Sun, T.]State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, College of Chemistry, Fuzhou University, China
[ 3 ] [Li, M.]State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, College of Chemistry, Fuzhou University, China
[ 4 ] [Yang, J.]State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, College of Chemistry, Fuzhou University, China
[ 5 ] [Shen, J.]State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, College of Chemistry, Fuzhou University, China
[ 6 ] [Zhang, Z.]State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, College of Chemistry, Fuzhou University, China
[ 7 ] [Wang, Y.]State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, College of Chemistry, Fuzhou University, China
[ 8 ] [Zhang, X.]State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, College of Chemistry, Fuzhou University, China
[ 9 ] [Wang, X.]State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, College of Chemistry, Fuzhou University, China

Reprint 's Address：

[Zhang, Z.]State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, College of Chemistry, Fuzhou UniversityChina

Email：

z.zhang@fzu.edu.cn

Show more details

Related Keywords：

Source ：

Journal of Catalysis

ISSN： 0021-9517

Year： 2019

Volume： 372

Page： 8-18

7 . 8 8 8

JCR@2019

6 . 5 0 0

JCR@2023

ESI HC Threshold：184

JCR Journal Grade：1

CAS Journal Grade：1

Cited Count：

WoS CC Cited Count： 0

SCOPUS Cited Count： 41

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 1

Affiliated Colleges：

Get Fulltext

DOI Library Discovery Baidu Scholar Search SCOPUS

Type
Departments

All Years Choose Year From to