Construction of CdSe polymorphic junctions with coherent interface for enhanced photoelectrocatalytic hydrogen generation

Qianqian Shen; Jinbo Xue; Yong Li; Guoxiang Gao; Qi Li; Xuguang Liu; Husheng Jia; Bingshe Xu; Yucheng Wu; Shen J. Dillon

doi:10.1016/j.apcatb.2020.119552

Construction of CdSe polymorphic junctions with coherent interface for enhanced photoelectrocatalytic hydrogen generation

Qianqian Shen
, Jinbo Xue
, Yong Li
, Guoxiang Gao
, Qi Li
, Xuguang Liu
, Husheng Jia
, Bingshe Xu
, Yucheng Wu
, Shen J. Dillon

Research output: Contribution to journal › Article › peer-review

Abstract

CdSe with high densities of coherent polymorphic zincblende/wurtzite (ZB/WZ) interfaces were deposited on TiO₂ nanorod arrays (NRAs) by electrodeposition and an optimized annealing process. In situ TEM annealing experiments observed the formation of the ZB/WZ polymorphic junctions that resulted from the change of atomic stacking sequence by dislocation movement induced by stoichiometry changes occurring during annealing. The process deforms CdSe₄-tetrahedrons in ZB driving the ZB to WZ phase transition. The formation of ZB/WZ coherent polymorphic junctions enhanced the separation and transport of photo-generated electron-hole pairs in CdSe. The CdSe/TiO₂ photoanode produced H₂ at a rate of 260.9 μmol cm⁻² h^-1 under AM 1.5 global sunlight (AM 1.5 G). This is the highest reported value among CdSe-based photoanodes, which indicates the important role of the coherent polymorphic junctions.

Original language	English (US)
Article number	119552
Journal	Applied Catalysis B: Environmental
Volume	282
DOIs	https://doi.org/10.1016/j.apcatb.2020.119552
State	Published - Mar 2021

Keywords

CdSe@TiO
Coherent interface
Phase transitions
Photoelectrocatalysis
Polymorphic junction

ASJC Scopus subject areas

Catalysis
General Environmental Science
Process Chemistry and Technology

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10.1016/j.apcatb.2020.119552

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@article{ae06696e3ccc4cbaa8d4384b6f666180,

title = "Construction of CdSe polymorphic junctions with coherent interface for enhanced photoelectrocatalytic hydrogen generation",

abstract = "CdSe with high densities of coherent polymorphic zincblende/wurtzite (ZB/WZ) interfaces were deposited on TiO2 nanorod arrays (NRAs) by electrodeposition and an optimized annealing process. In situ TEM annealing experiments observed the formation of the ZB/WZ polymorphic junctions that resulted from the change of atomic stacking sequence by dislocation movement induced by stoichiometry changes occurring during annealing. The process deforms CdSe4-tetrahedrons in ZB driving the ZB to WZ phase transition. The formation of ZB/WZ coherent polymorphic junctions enhanced the separation and transport of photo-generated electron-hole pairs in CdSe. The CdSe/TiO2 photoanode produced H2 at a rate of 260.9 μmol cm−2 h-1 under AM 1.5 global sunlight (AM 1.5 G). This is the highest reported value among CdSe-based photoanodes, which indicates the important role of the coherent polymorphic junctions.",

keywords = "CdSe@TiO, Coherent interface, Phase transitions, Photoelectrocatalysis, Polymorphic junction",

author = "Qianqian Shen and Jinbo Xue and Yong Li and Guoxiang Gao and Qi Li and Xuguang Liu and Husheng Jia and Bingshe Xu and Yucheng Wu and Dillon, \{Shen J.\}",

note = "The financial support is gratefully acknowledged from the National Natural Science Foundation of China (NSFC) (Grant No. 21878257 and 51402209 ), Natural Science Foundation (NSF) of Shanxi Province (Grant No. 201601D102020 and 201701D221083 ), Key Research and Development Program of Shanxi Province (Grant No. 201603D121017 , 201803D421079 and 201803D31042 ), Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (Grant No. 2019L0156 ), Fundamental Research Funds for the Central Universities [Grant No. A1920502051907-15 ], and Liaoning Baiqianwan Talents Program . The financial support is gratefully acknowledged from the National Natural Science Foundation of China (NSFC) (Grant No. 21878257 and 51402209), Natural Science Foundation (NSF) of Shanxi Province (Grant No. 201601D102020 and 201701D221083), Key Research and Development Program of Shanxi Province (Grant No. 201603D121017, 201803D421079 and 201803D31042), Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (Grant No. 2019L0156), Fundamental Research Funds for the Central Universities [Grant No. A1920502051907-15], and Liaoning Baiqianwan Talents Program.",

year = "2021",

month = mar,

doi = "10.1016/j.apcatb.2020.119552",

language = "English (US)",

volume = "282",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Construction of CdSe polymorphic junctions with coherent interface for enhanced photoelectrocatalytic hydrogen generation

AU - Shen, Qianqian

AU - Xue, Jinbo

AU - Li, Yong

AU - Gao, Guoxiang

AU - Li, Qi

AU - Liu, Xuguang

AU - Jia, Husheng

AU - Xu, Bingshe

AU - Wu, Yucheng

AU - Dillon, Shen J.

N1 - The financial support is gratefully acknowledged from the National Natural Science Foundation of China (NSFC) (Grant No. 21878257 and 51402209 ), Natural Science Foundation (NSF) of Shanxi Province (Grant No. 201601D102020 and 201701D221083 ), Key Research and Development Program of Shanxi Province (Grant No. 201603D121017 , 201803D421079 and 201803D31042 ), Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (Grant No. 2019L0156 ), Fundamental Research Funds for the Central Universities [Grant No. A1920502051907-15 ], and Liaoning Baiqianwan Talents Program . The financial support is gratefully acknowledged from the National Natural Science Foundation of China (NSFC) (Grant No. 21878257 and 51402209), Natural Science Foundation (NSF) of Shanxi Province (Grant No. 201601D102020 and 201701D221083), Key Research and Development Program of Shanxi Province (Grant No. 201603D121017, 201803D421079 and 201803D31042), Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (Grant No. 2019L0156), Fundamental Research Funds for the Central Universities [Grant No. A1920502051907-15], and Liaoning Baiqianwan Talents Program.

PY - 2021/3

Y1 - 2021/3

N2 - CdSe with high densities of coherent polymorphic zincblende/wurtzite (ZB/WZ) interfaces were deposited on TiO2 nanorod arrays (NRAs) by electrodeposition and an optimized annealing process. In situ TEM annealing experiments observed the formation of the ZB/WZ polymorphic junctions that resulted from the change of atomic stacking sequence by dislocation movement induced by stoichiometry changes occurring during annealing. The process deforms CdSe4-tetrahedrons in ZB driving the ZB to WZ phase transition. The formation of ZB/WZ coherent polymorphic junctions enhanced the separation and transport of photo-generated electron-hole pairs in CdSe. The CdSe/TiO2 photoanode produced H2 at a rate of 260.9 μmol cm−2 h-1 under AM 1.5 global sunlight (AM 1.5 G). This is the highest reported value among CdSe-based photoanodes, which indicates the important role of the coherent polymorphic junctions.

AB - CdSe with high densities of coherent polymorphic zincblende/wurtzite (ZB/WZ) interfaces were deposited on TiO2 nanorod arrays (NRAs) by electrodeposition and an optimized annealing process. In situ TEM annealing experiments observed the formation of the ZB/WZ polymorphic junctions that resulted from the change of atomic stacking sequence by dislocation movement induced by stoichiometry changes occurring during annealing. The process deforms CdSe4-tetrahedrons in ZB driving the ZB to WZ phase transition. The formation of ZB/WZ coherent polymorphic junctions enhanced the separation and transport of photo-generated electron-hole pairs in CdSe. The CdSe/TiO2 photoanode produced H2 at a rate of 260.9 μmol cm−2 h-1 under AM 1.5 global sunlight (AM 1.5 G). This is the highest reported value among CdSe-based photoanodes, which indicates the important role of the coherent polymorphic junctions.

KW - CdSe@TiO

KW - Coherent interface

KW - Phase transitions

KW - Photoelectrocatalysis

KW - Polymorphic junction

UR - https://www.scopus.com/pages/publications/85091366847

UR - https://www.scopus.com/pages/publications/85091366847#tab=citedBy

U2 - 10.1016/j.apcatb.2020.119552

DO - 10.1016/j.apcatb.2020.119552

M3 - Article

AN - SCOPUS:85091366847

SN - 0926-3373

VL - 282

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

M1 - 119552

ER -

Construction of CdSe polymorphic junctions with coherent interface for enhanced photoelectrocatalytic hydrogen generation

Abstract

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