An exceptionally facile method to produce layered double hydroxides on a conducting substrate and their application for solar water splitting without an external bias

被引：38

作者：

Cho, Seungho ^{[1
]}

Jang, Ji-Wook ^{[2
]}

Park, Yoon Bin ^{[3
]}

Kim, Jae Young ^{[2
]}

Magesh, Ganesan ^{[2
]}

Kim, Jin Hyun ^{[4
]}

Seol, Minsu ^{[3
]}

Yong, Kijung ^{[3
]}

Lee, Kun-Hong ^{[3
]}

Lee, Jae Sung ^{[2
]}

机构：

[1] Pohang Univ Sci & Technol POSTECH, Dept Chem, Pohang 790784, South Korea

[2] UNIST, Sch Energy & Chem Engn, Ulsan 689798, South Korea

[3] Pohang Univ Sci & Technol POSTECH, Dept Chem Engn, Pohang 790784, South Korea

[4] Pohang Univ Sci & Technol POSTECH, Sch Environm Engn, Pohang 790784, South Korea

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2014年 / 7卷 / 07期

基金：

新加坡国家研究基金会;

关键词：

THERMAL-DECOMPOSITION; METAL; OXIDATION; PHOTOANODES; MECHANISM; ENERGY; OXIDES;

D O I：

10.1039/c3ee43965h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An exceptionally facile process is presented for in situ formation of zinc chromium layered double hydroxide (ZnCr:LDH) nanosheets on a conducting substrate. Thus, ZnCr:LDH nanosheets were synthesized from a metallic Zn film/fluorine-doped tin oxide (FTO) glass by simply dipping into a Cr nitrate solution for only one minute at room temperature. Then, ZnCr:LDHs were converted into zinc chromium mixed metal oxide (ZnCr:MMO) nanoparticles by calcination. Under visible light irradiation (lambda > 420 nm), the in situ synthesized ZnCr:MMO photoanode exhibited a stable and an order-of-magnitude higher activity for photoelectrochemical water splitting than that of a ZnCr:MMO film fabricated ex situ by electrophoretic deposition of already-synthesized ZnCr:MMO powders. More significant was that it generated anodic photocurrents even without an externally applied bias potential, which is an unprecedented result for an oxide photoanode-driven PEC system working under visible light.

引用

页码：2301 / 2307

页数：7

共 29 条

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