Stabilization of Si microwire arrays for solar-driven H2O oxidation to O2(g) in 1.0 M KOH(aq) using conformal coatings of amorphous TiO2

被引：115

作者：

Shaner, Matthew R. ^{[1
,2
]}

Hu, Shu ^{[1
,2
]}

Sun, Ke ^{[1
,2
]}

Lewis, Nathan S. ^{[1
,2
,3
,4
]}

机构：

[1] CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA

[2] CALTECH, Joint Ctr Artificial Photosynth, Pasadena, CA 91125 USA

[3] CALTECH, Beckman Inst, Mol Mat Res Ctr, Pasadena, CA 91125 USA

[4] CALTECH, Kavli Nanosci Inst, Pasadena, CA 91125 USA

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2015年 / 8卷 / 01期

关键词：

PHOTOANODES; NANOWIRE; ABSORPTION; GROWTH;

D O I：

10.1039/c4ee03012e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Conductive, amorphous TiO2 coatings deposited by atomic-layer deposition, in combination with a sputter deposited NiCrOx oxygen-evolution catalyst, have been used to protect Si microwire arrays from passivation or corrosion in contact with aqueous electrolytes. Coated np(+)-Si/TiO2/NiCrOx as well as heterojunction n-Si/TiO2/NiCrOx Si microwire-array photoanodes exhibited stable photoelectrochemical operation in aqueous ferri-/ferro-cyanide solutions. The coatings also allowed for photoanodic water oxidation in 1.0 M KOH(aq) solutions for >2200 h of continuous operation under simulated 1 Sun conditions with similar to 100% Faradaic efficiency for the evolution of O-2(g).

引用

页码：203 / 207

页数：5

共 15 条

[1] Light trapping and absorption optimization in certain thin-film photonic crystal architectures [J].

Chutinan, Alongkarn ;

John, Sajeev .

PHYSICAL REVIEW A, 2008, 78 (02)

[2] Gas phase equilibrium limitations on the vapor-liquid-solid growth of epitaxial silicon nanowires using SiCl4 [J].

Eichfeld, Sarah M. ;

Shen, Haoting ;

Eichfeld, Chad M. ;

Mohney, Suzanne E. ;

Dickey, Elizabeth C. ;

Redwing, Joan M. .

JOURNAL OF MATERIALS RESEARCH, 2011, 26 (17) :2207-2214

[3] Modeling, simulation, and design criteria for photoelectrochemical water-splitting systems [J].

Haussener, Sophia ;

Xiang, Chengxiang ;

Spurgeon, Joshua M. ;

Ardo, Shane ;

Lewis, Nathan S. ;

Weber, Adam Z. .

ENERGY & ENVIRONMENTAL SCIENCE, 2012, 5 (12) :9922-9935

[4] Amorphous TiO2 coatings stabilize Si, GaAs, and GaP photoanodes for efficient water oxidation [J].

Hu, Shu ;

Shaner, Matthew R. ;

Beardslee, Joseph A. ;

Lichterman, Michael ;

Brunschwig, Bruce S. ;

Lewis, Nathan S. .

SCIENCE, 2014, 344 (6187) :1005-1009

[5] Optical, electrical, and solar energy-conversion properties of gallium arsenide nanowire-array photoanodes [J].

Hu, Shu ;

Chi, Chun-Yung ;

Fountaine, Katherine T. ;

Yao, Maoqing ;

Atwater, Harry A. ;

Dapkus, P. Daniel ;

Lewis, Nathan S. ;

Zhou, Chongwu .

ENERGY & ENVIRONMENTAL SCIENCE, 2013, 6 (06) :1879-1890

[6]

Kelzenberg MD, 2010, NAT MATER, V9, P239, DOI [10.1038/nmat2635, 10.1038/NMAT2635]

[7] Stabilization of n-cadmium telluride photoanodes for water oxidation to O2(g) in aqueous alkaline electrolytes using amorphous TiO2 films formed by atomic-layer deposition [J].

Lichterman, Michael F. ;

Carim, Azhar I. ;

McDowell, Matthew T. ;

Hu, Shu ;

Gray, Harry B. ;

Brunschwig, Bruce S. ;

Lewis, Nathan S. .

ENERGY & ENVIRONMENTAL SCIENCE, 2014, 7 (10) :3334-3337

[8] Toward Optimized Light Utilization in Nanowire Arrays Using Scalable Nanosphere Lithography and Selected Area Growth [J].

Madaria, Anuj R. ;

Yao, Maoqing ;

Chi, ChunYung ;

Huang, Ningfeng ;

Lin, Chenxi ;

Li, Ruijuan ;

Povinelli, Michelle L. ;

Dapkus, P. Daniel ;

Zhou, Chongwu .

NANO LETTERS, 2012, 12 (06) :2839-2845

[9] Improved Stability of Polycrystalline Bismuth Vanadate Photoanodes by Use of Dual-Layer Thin TiO2/Ni Coatings [J].

McDowell, Matthew T. ;

Lichterman, Michael F. ;

Spurgeon, Joshua M. ;

Hu, Shu ;

Sharp, Ian D. ;

Brunschwig, Bruce S. ;

Lewis, Nathan S. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2014, 118 (34) :19618-19624

[10] Will Solar-Driven Water-Splitting Devices See the Light of Day? [J].

McKone, James R. ;

Lewis, Nathan S. ;

Gray, Harry B. .

CHEMISTRY OF MATERIALS, 2014, 26 (01) :407-414

← 1 2 →