Photoelectrochemical water splitting over ordered honeycomb hematite electrodes stabilized by alumina shielding

被引：84

作者：

Jun, Hwichan ^{[1
]}

Im, Badro ^{[1
]}

Kim, Jae Young ^{[1
]}

Im, Yong-O ^{[1
]}

Jang, Ji-Wook ^{[1
]}

Kim, Eun Sun ^{[1
]}

Kim, Jae Yul ^{[1
]}

Kang, Hyeon Joon ^{[1
]}

Hong, Suk Joon ^{[1
]}

Lee, Jae Sung ^{[1
]}

机构：

[1] POSTECH, Dept Chem Engn, Div Adv Nucl Engn, Pohang 790784, South Korea

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2012年 / 5卷 / 04期

关键词：

THIN-FILMS; HYDROGEN-PRODUCTION; CHARGE-TRANSFER; IRON-OXIDE; PHOTOOXIDATION; FABRICATION; PHOTOANODE; GENERATION; ARRAYS; TI;

D O I：

10.1039/c1ee02526k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Highly ordered, honeycomb-like iron oxide (hematite) films were fabricated by double-step anodic oxidation of iron foil. The honeycomb structure obtained by double step anodization was found to be more effective in producing a large area film with homogeneous pore distribution compared to nanotubes fabricated by the conventional single-step anodic oxidation process. To prevent agglomeration of the hematite film during the annealing process, a thin alumina layer was deposited on the hematite film surface by atomic layer deposition. With this alumina shielding and subsequent removal by alkaline treatment, one-dimensional (1-D) hematite nanostructure was preserved perfectly after annealing at 550 degrees C. This highly ordered 1-D nanostructure film showed much enhanced photoelectrochemical cell performances relative to hematite films with low degrees of ordering.

引用

页码：6375 / 6382

页数：8

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