A ZnO/ZnO: Cr isostructural nanojunction electrode for photoelectrochemical water splitting

Shaohua Shen; Coleman X. Kronawitter; Jiangang Jiang; Penghui Guo; Liejin Guo; Samuel S. Mao

doi:10.1016/j.nanoen.2013.03.017

A ZnO/ZnO: Cr isostructural nanojunction electrode for photoelectrochemical water splitting

Shaohua Shen
, Coleman X. Kronawitter
, Jiangang Jiang
, Penghui Guo
, Liejin Guo
, Samuel S. Mao

Mechanical & Nuclear Engineering

State Key Laboratory of Multiphase Flow in Power Engineering
University of California, Berkeley

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

29 Scopus citations

Abstract

The fabrication and photoelectrochemical characterization of a ZnO/ZnO:Cr isostructural nanojunction electrode is presented. When compared to its constituent components the isostructural nanojunction showed superior performance for water splitting under simulated solar light and visible light (λ510. nm) illumination. In the engineered structure, the presence of intra-bandgap states associated with Cr impurities increases optical absorption, and the nanorod morphology provides a direct pathway for transport of photo-excited electrons to the back contact. The overall photoelectrochemical performance of the ZnO/ZnO:Cr engineered structure is relatively low, however the concept may prove to be applicable to more optimized structures or material systems.

Original language	British English
Pages (from-to)	958-965
Number of pages	8
Journal	Nano Energy
Volume	2
Issue number	5
DOIs	https://doi.org/10.1016/j.nanoen.2013.03.017
State	Published - Sep 2013

Keywords

Cr doping
Nanojunction
Photoanodes
Water splitting
ZnO nanorods

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@article{a511e60b6d93466fbbbb38d2543b06b8,

title = "A ZnO/ZnO: Cr isostructural nanojunction electrode for photoelectrochemical water splitting",

abstract = "The fabrication and photoelectrochemical characterization of a ZnO/ZnO:Cr isostructural nanojunction electrode is presented. When compared to its constituent components the isostructural nanojunction showed superior performance for water splitting under simulated solar light and visible light (λ510. nm) illumination. In the engineered structure, the presence of intra-bandgap states associated with Cr impurities increases optical absorption, and the nanorod morphology provides a direct pathway for transport of photo-excited electrons to the back contact. The overall photoelectrochemical performance of the ZnO/ZnO:Cr engineered structure is relatively low, however the concept may prove to be applicable to more optimized structures or material systems.",

keywords = "Cr doping, Nanojunction, Photoanodes, Water splitting, ZnO nanorods",

author = "Shaohua Shen and Kronawitter, \{Coleman X.\} and Jiangang Jiang and Penghui Guo and Liejin Guo and Mao, \{Samuel S.\}",

note = "Funding Information: The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (No. 51102194 , No. 51121092 ), the Doctoral Program of the Ministry of Education (No. 20110201120040 ), the Natural Science Foundation of Shaanxi Province (No. 2011JQ7017 ) and the National Basic Research Program of China (No. 2009CB220000 ). One of the authors (S. Shen) was supported by the “Fundamental Research Funds for the Central Universities”. This research has also been partially supported by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy and NSF/CMMI under grant \#1036076 . ",

year = "2013",

month = sep,

doi = "10.1016/j.nanoen.2013.03.017",

language = "British English",

volume = "2",

pages = "958--965",

journal = "Nano Energy",

issn = "2211-2855",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - A ZnO/ZnO

T2 - Cr isostructural nanojunction electrode for photoelectrochemical water splitting

AU - Shen, Shaohua

AU - Kronawitter, Coleman X.

AU - Jiang, Jiangang

AU - Guo, Penghui

AU - Guo, Liejin

AU - Mao, Samuel S.

N1 - Funding Information: The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (No. 51102194 , No. 51121092 ), the Doctoral Program of the Ministry of Education (No. 20110201120040 ), the Natural Science Foundation of Shaanxi Province (No. 2011JQ7017 ) and the National Basic Research Program of China (No. 2009CB220000 ). One of the authors (S. Shen) was supported by the “Fundamental Research Funds for the Central Universities”. This research has also been partially supported by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy and NSF/CMMI under grant #1036076 .

PY - 2013/9

Y1 - 2013/9

N2 - The fabrication and photoelectrochemical characterization of a ZnO/ZnO:Cr isostructural nanojunction electrode is presented. When compared to its constituent components the isostructural nanojunction showed superior performance for water splitting under simulated solar light and visible light (λ510. nm) illumination. In the engineered structure, the presence of intra-bandgap states associated with Cr impurities increases optical absorption, and the nanorod morphology provides a direct pathway for transport of photo-excited electrons to the back contact. The overall photoelectrochemical performance of the ZnO/ZnO:Cr engineered structure is relatively low, however the concept may prove to be applicable to more optimized structures or material systems.

AB - The fabrication and photoelectrochemical characterization of a ZnO/ZnO:Cr isostructural nanojunction electrode is presented. When compared to its constituent components the isostructural nanojunction showed superior performance for water splitting under simulated solar light and visible light (λ510. nm) illumination. In the engineered structure, the presence of intra-bandgap states associated with Cr impurities increases optical absorption, and the nanorod morphology provides a direct pathway for transport of photo-excited electrons to the back contact. The overall photoelectrochemical performance of the ZnO/ZnO:Cr engineered structure is relatively low, however the concept may prove to be applicable to more optimized structures or material systems.

KW - Cr doping

KW - Nanojunction

KW - Photoanodes

KW - Water splitting

KW - ZnO nanorods

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DO - 10.1016/j.nanoen.2013.03.017

M3 - Article

AN - SCOPUS:84885313394

SN - 2211-2855

VL - 2

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EP - 965

JO - Nano Energy

JF - Nano Energy

IS - 5

ER -

A ZnO/ZnO: Cr isostructural nanojunction electrode for photoelectrochemical water splitting

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Keywords

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