Active Sites for Oxygen Reduction Reaction and the Reaction Mechanism in Carbon-Supported Hafnium Oxynitride

被引：19

作者：

Chisaka, Mitsuharu ^{[1
]}

Suzuki, Yuta ^{[1
]}

Iijima, Tomohiro ^{[1
]}

Ishihara, Yuki ^{[1
]}

Inada, Ryoji ^{[1
]}

Sakurai, Yoji ^{[1
]}

机构：

[1] Toyohashi Univ Technol, Dept Elect & Elect Informat Engn, Tempaku Ku, Toyohashi, Aichi 4418580, Japan

来源：

ECS ELECTROCHEMISTRY LETTERS | 2012年 / 1卷 / 01期

基金：

日本科学技术振兴机构;

关键词：

ELECTROCATALYTIC REDUCTION; CATALYSTS; CATHODE; STABILITY; NANOTUBES; PLATINUM; GROWTH; OXIDE; O-2; CNX;

D O I：

10.1149/2.004201eel

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Active sites for an oxygen reduction reaction (ORR) and the reaction mechanism in hafnium oxynitride nanoparticles supported on carbon black (HfOxNy-C) were investigated by using several heat-treatment steps under H-2/Ar (5% H-2) gas, NH3 gas, or both. Nitrogen-free monoclinic-phase hafnium oxide nanoparticles with oxygen defects were found to be active toward ORR for the first time. Nonetheless, doping of nitrogen into the hafnium oxides produced more active sites. Furthermore, the process proceeded primarily via a 4-electron reaction in which oxygen molecules were directly reduced to water. Therefore, at least, nitrogen atoms in HfOxNy are necessary for maximizing the ORR activity. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.004201eel] All rights reserved.

引用

收藏

页码：F4 / F8

页数：5

相关论文

共 39 条

[1] MECHANISM OF ELECTROCATALYTIC REDUCTION OF OXYGEN ON METAL-CHELATES [J].

ALT, H ;

BINDER, H ;

SANDSTED.G .

JOURNAL OF CATALYSIS, 1973, 28 (01) :8-19

[2]

[Anonymous], J TRACE MICROPROBE T

[3] A class of non-precious metal composite catalysts for fuel cells [J].

Bashyam, Rajesh ;

Zelenay, Piotr .

NATURE, 2006, 443 (7107) :63-66

[4] Examination of Catalyst Loading Effects on the Selectivity of CNx and Pt/VC ORR Catalysts Using RRDE [J].

Biddinger, Elizabeth J. ;

von Deak, Dieter ;

Singh, Deepika ;

Marsh, Hilary ;

Tan, Bing ;

Knapke, Douglas S. ;

Ozkan, Umit S. .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2011, 158 (04) :B402-B409

[5] Impact of loading in RRDE experiments on Fe-N-C catalysts: Two- or four-electron oxygen reduction? [J].

Bonakdarpour, Arman ;

Lefevre, Michel ;

Yang, Ruizhi ;

Jaouen, Frederic ;

Dahn, Tara ;

Dodelet, Jean-Pol ;

Dahn, J. R. .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2008, 11 (06) :B105-B108

[6] Graphene-Based Non-Noble-Metal Catalysts for Oxygen Reduction Reaction in Acid [J].

Byon, Hye Ryung ;

Suntivich, Jin ;

Shao-Horn, Yang .

CHEMISTRY OF MATERIALS, 2011, 23 (15) :3421-3428

[7] Fe/N/C non-precious catalysts for PEM fuel cells: Influence of the structural parameters of pristine commercial carbon blacks on their activity for oxygen reduction [J].

Charreteur, Fanny ;

Jaouen, Frederic ;

Ruggeri, Stephane ;

Dodelet, Jean-Pol .

ELECTROCHIMICA ACTA, 2008, 53 (06) :2925-2938

[8] Effect of Synthesis Route on Oxygen Reduction Reaction Activity of Carbon-Supported Hafnium Oxynitride in Acid Media [J].

Chisaka, Mitsuharu ;

Suzuki, Yuta ;

Iijima, Tomohiro ;

Sakurai, Yoji .

JOURNAL OF PHYSICAL CHEMISTRY C, 2011, 115 (42) :20610-20617

[9] Carbon-supported hafnium oxynitride as cathode catalyst for polymer electrolyte membrane fuel cells [J].

Chisaka, Mitsuharu ;

Iijima, Tomohiro ;

Yaguchi, Tatsuro ;

Sakurai, Yoji .

ELECTROCHIMICA ACTA, 2011, 56 (12) :4581-4588

[10] Bond nature of oxygen-deficient HfO2/Si(100) film [J].

Cho, Deok-Yong ;

Min, C. -H. ;

Kim, Jungho ;

Oh, S. -J. ;

Kim, Min Gyu .

APPLIED PHYSICS LETTERS, 2006, 89 (25)

← 1 2 3 4 →