Mg-doped Ta3N5 nanorods coated with a conformal CoOOH layer for water oxidation: bulk and surface dual modification of photoanodes
Mg-doped Ta3N5 nanorods coated with a conformal CoOOH layer for water oxidation: bulk and surface dual modification of photoanodes
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涂覆有共形 CoOOH 层的掺镁 Ta3N5 纳米棒用于水氧化:光电阳极的本体和表面双重改性
DOI:
10.1039/c7ta06227c
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发表时间:
2017-10
影响因子:
11.9
通讯作者:
Zou Zhigang
中科院分区:
文献类型:
--
作者:
Pei Lang;Xu Zhe;Shi Zhan;Zhu Heng;Yan Shicheng;Zou Zhigang
Charge separation/transfer and photocorrosion are two major factors limiting the photoelectrochemical (PEC) applications of the Ta3N5 photocatalyst. Herein, we have fabricated Ta3N5 single-crystal nanorods with Mg doping by flux-assisted crystal growth, aiming to shorten the charge transport distance and increase the electrical conductivity. The optimized Mg-doped Ta3N5 photoanodes exhibit an unprecedented PEC water splitting activity with an AM 1.5G photocurrent of 1.5 mA cm−2 at 1.23 VRHE. The high performance is attributed to the fact that the bulk modification, Mg doping, can induce oxygen-impurity surface states as effective electron trap centers, thus increasing the electrical conductivity of Ta3N5 and charge separation efficiency. After a conformal surface modification with CoOOH by a simple electrodeposition method as a water oxidation electrocatalyst to improve the hole extraction and reaction kinetics, the Mg-doped Ta3N5 photoanodes afford an over 4-fold increase in photocurrent (ca. 6.5 mA cm−2 at 1.23 VRHE) and about 70% retention of the initial photocurrent after 70 min irradiation at 1.0 VRHE. Our results testify that the bulk and surface co-modification is an effective route to develop high-performance PEC water splitting devices.
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影响因子:
6.7
作者:
Peng Zhang;Tuo Wang;Jijie Zhang;X. Chang;Jinlong Gong
通讯作者:
Peng Zhang;Tuo Wang;Jijie Zhang;X. Chang;Jinlong Gong
影响因子:
6.6
作者:
Liu, Ying-Chau;Koza, Jakub A.;Switzer, Jay A.
通讯作者:
Switzer, Jay A.
影响因子:
15
作者:
Ma, Su Su Khine;Hisatomi, Takashi;Domen, Kazunari
通讯作者:
Domen, Kazunari
影响因子:
4.1
作者:
Wu, Cheng Hao;Hahn, Christopher;Yang, Peidong
通讯作者:
Yang, Peidong
DOI:
10.1039/c5ta07057k
发表时间:
2015
期刊:
J. Mater. Chem. A
影响因子:
--
作者:
Chao Zhen;Runze Chen;Lianzhou Wang;Gang Liu;Hui-Ming Cheng
通讯作者:
Hui-Ming Cheng