Atomic Layer Deposition of a Submonolayer Catalyst for the Enhanced Photoelectrochemical Performance of Water Oxidation with Hematite

被引：240

作者：

Riha, Shannon C. ^{[1
,2
]}

Klahr, Benjamin M. ^{[3
]}

Tyo, Eric C. ^{[5
]}

Seifert, Soenke ^{[4
]}

Vajda, Stefan ^{[1
,5
,6
]}

Pellin, Michael J. ^{[1
,2
]}

Hamann, Thomas W. ^{[3
]}

Martinson, Alex B. F. ^{[1
,2
]}

机构：

[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[2] Argonne Natl Lab, Argonne Northwestern Solar Energy Res ANSER Ctr, Argonne, IL 60439 USA

[3] Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA

[4] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA

[5] Yale Univ, Sch Engn & Appl Sci, Dept Chem & Environm Engn, New Haven, CT 06520 USA

[6] Argonne Natl Lab, Nanosci & Technol Div, Argonne, IL 60439 USA

来源：

ACS NANO | 2013年 / 7卷 / 03期

基金：

美国国家科学基金会;

关键词：

hematite; Fe2O3; photoelectrocatalysis; water oxidation; electrochemical impedance spectroscopy; X-ray absorption spectroscopy; XANES; DRIVEN OXYGEN EVOLUTION; SOLAR-ENERGY CONVERSION; THIN-FILMS; SIZE; PHOTOANODES; KINETICS; SURFACE; DEHYDROGENATION; PHOTOLYSIS; HYDROGEN;

D O I：

10.1021/nn305639z

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Hematite photoanodes were coated with an ultrathin cobalt oxide layer by atomic layer deposition (AID). The optimal coating-1 ALD cycle, which amounts to <1 monolayer of Co(OH)(2)/Co3O4-resulted in significantly enhanced photoelectrochemical water oxidation performance. A stable, 100-200 mV cathodic shift In the photocurrent onset potential was observed that is correlated to an order of magnitude reduction in the resistance to charge transfer at the Fe2O3/H2O Interface. Furthermore, the optical transparency of the ultrathin Co(OH)(2)/Co3O4 coating establishes it as a particularly advantageous treatment for nanostructured water oxidation photoanodes. The photocurrent of catalyst-coated nanostructured inverse opal scaffold hematite photoanodes reached 0.81 and 2.1 mA/cm(2) at 1.23 and 1.53 V, respectively.

引用

页码：2396 / 2405

页数：10

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