A High Yield Synthesis of Ligand-Free Iridium Oxide Nanoparticles with High Electrocatalytic Activity

被引：282

作者：

Zhao, Yixin ^{[1
]}

Hernandez-Pagan, Emil A. ^{[1
]}

Vargas-Barbosa, Nella M. ^{[1
]}

Dysart, Jennifer L. ^{[1
]}

Mallouk, Thomas E. ^{[1
]}

机构：

[1] Penn State Univ, Dept Chem, University Pk, PA 16802 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2011年 / 2卷 / 05期

基金：

美国国家科学基金会;

关键词：

DRIVEN WATER OXIDATION; OXYGEN-EVOLVING CATALYST; MESOPOROUS SILICA; COMPLEXES; EFFICIENT; COLLOIDS; CLUSTERS; DIMER; FILM;

D O I：

10.1021/jz200051c

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：

Stable blue suspensions of 2 nm diameter iridium oxide (IrOx center dot nH(2)O) nanoparticles were obtained by hydrolyzing IrCl62- in base at 90 degrees C to produce [Ir(OH)(6)](2-) and, then treating with HNO3 at 0 degrees C. UV-visible spectra show that acid condensation of [Ir(OH)(6)](2-) results in quantitative Conversion to,stable; hand free IrOx center dot nH(2)O nanoparticles, which have an extinction coefficient of 630 +/- 50 M(-1)cm(-1) at 580 nm. In contrast, alkaline hydrolysis alone converts only 30% of the sample to IrOx center dot nH(2)O at 2 mM concentration. The acidified nanoparticles are stable for at least one month at 2 degrees C and can be used to make colloidal solutions between PH 1 and 13. At pH 7 and above, some hydrolysis to form [Ir(OH)(6)](2-) occurs. Uniform IrOx center dot nH(2)O electrode films were grown anodically from pH 1 solutions, and were found. to be highly active for water oxidation between pH 1 and 13.

引用

页码：402 / 406

页数：5

共 41 条

[1] Half-Sandwich Iridium Complexes for Homogeneous Water-Oxidation Catalysis [J].

Blakemore, James D. ;

Schley, Nathan D. ;

Balcells, David ;

Hull, Jonathan F. ;

Olack, Gerard W. ;

Incarvito, Christopher D. ;

Eisenstein, Odile ;

Brudvig, Gary W. ;

Crabtree, Robert H. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2010, 132 (45) :16017-16029

[2] Sustained water oxidation photocatalysis by a bioinspired manganese cluster [J].

Brimblecombe, Robin ;

Swiegers, Gerhard F. ;

Dismukes, G. Charles ;

Spiccia, Leone .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2008, 47 (38) :7335-7338

[3] Solar Driven Water Oxidation by a Bioinspired Manganese Molecular Catalyst [J].

Brimblecombe, Robin ;

Koo, Annette ;

Dismukes, G. Charles ;

Swiegers, Gerhard F. ;

Spiccia, Leone .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2010, 132 (09) :2892-+

[4] Dimer-of-dimers model for the oxygen-evolving complex of photosystem II.: synthesis and properties of [MnIV4O5(terpy)4(H2O)2](ClO4)6 [J].

Chen, HY ;

Faller, JW ;

Crabtree, RH ;

Brudvig, GW .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (23) :7345-7349

[5] Mediator-assisted water oxidation by the ruthenium "blue dimer" cis,cis-[(bpy)2(H2O)RuORu(OH2)(bpy)2]4+ [J].

Concepcion, Javier J. ;

Jurss, Jonah W. ;

Templeton, Joseph L. ;

Meyer, Thomas J. .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2008, 105 (46) :17632-17635

[6]

Desideri P., 1961, RIC SCI 2 A, V1, P265

[7] Nickel-borate oxygen-evolving catalyst that functions under benign conditions [J].

Dinca, Mircea ;

Surendranath, Yogesh ;

Nocera, Daniel G. .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2010, 107 (23) :10337-10341

[8] An all-inorganic, stable, and highly active tetraruthenium homogeneous catalyst for water oxidation [J].

Geletii, Yurii V. ;

Botar, Bogdan ;

Koegerler, Paul ;

Hillesheim, Daniel A. ;

Musaev, Djamaladdin G. ;

Hill, Craig L. .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2008, 47 (21) :3896-3899

[9] Homogeneous Light-Driven Water Oxidation Catalyzed by a Tetraruthenium Complex with All Inorganic Ligands [J].

Geletii, Yurii V. ;

Huang, Zhuangqun ;

Hou, Yu ;

Musaev, Djamaladdin G. ;

Lian, Tianquan ;

Hill, Craig L. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (22) :7522-+

[10] Controlled assembly of hetero-binuclear sites on mesoporous silica: Visible light charge-transfer units with selectable redox properties [J].

Han, Hongxian ;

Frei, Heinz .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (22) :8391-8399

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