Rapid Screening of BiVO4-Based Photocatalysts by Scanning Electrochemical Microscopy (SECM) and Studies of Their Photoelectrochemical Properties

被引：186

作者：

Ye, Heechang ^{[1
]}

Lee, Jouwook ^{[1
]}

Jang, Jum Suk ^{[1
]}

Bard, Allen J. ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Chem & Biochem, Ctr Electrochem, Austin, TX 78712 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 31期

基金：

美国国家科学基金会;

关键词：

VISIBLE-LIGHT IRRADIATION; WATER OXIDATION; BIVO4; SEMICONDUCTOR; AG; CATALYSTS; COMPOSITE; EVOLUTION; O-2;

D O I：

10.1021/jp104343b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A picoliter solution dispenser was used to fabricate various n-type BiVO4 based photocatalyst arrays having different compositions and a scanning electrochemical microscopy (SECM) technique modified by replacing a normal ultramicroelectrode with an optical fiber was used for fast screening of the effective photocatalysts for Na2SO3 (as a sacrificial reductant) and water oxidation. Bi/V/W oxide with a ratio of 4 5.5 0.5 showed similar to 4 6x higher photocurrent than Bi/V oxide without W and this result was confirmed with bulk film studies. Preliminary characterization (XRD, XPS, and EIS) was also performed for these catalysts This material was tested for photoelectrochemical water oxidation with a Pt ring optical fiber to detect the product (O-2) of photoelectrochemical oxidation reaction

引用

页码：13322 / 13328

页数：7

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