A Carbon-Support-Free Titanium Oxynitride Catalyst for Proton Exchange Membrane Fuel Cell Cathodes

被引：29

作者：

Chisaka, Mitsuharu ^{[1
,2
]}

Ando, Yuta ^{[1
]}

Yamamoto, Yusuke ^{[1
]}

Itagaki, Noriaki ^{[1
]}

机构：

[1] Hirosaki Univ, Dept Elect & Informat Technol, 3 Bunkyo Cho, Hirosaki, Aomori 0368561, Japan

[2] Hirosaki Univ, Dept Sustainable Energy, 3 Bunkyo Cho, Hirosaki, Aomori 0368561, Japan

来源：

ELECTROCHIMICA ACTA | 2016年 / 214卷

基金：

日本科学技术振兴机构;

关键词：

ORR; TiO2; rutile; amorphous; OXYGEN REDUCTION REACTION; RAMAN-SPECTRA; BAND-GAP; NITROGEN; OXIDE; PERFORMANCE; TIO2; IRON; ELECTROCATALYSTS; FABRICATION;

D O I：

10.1016/j.electacta.2016.08.032

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

070208 [无线电物理];

摘要：

Cathode catalysts without platinum group metals (PGMs) or carbon supports can reduce the price of proton exchange membrane fuel cells in automobiles, making them commercially competitive. In this paper, an inexpensive and PGM-free catalyst-amorphous nitrogen-doped TiO2-shell on TiN-core-was synthesized without carbon support. While existing PGM-free all-oxide catalysts without carbon support have shown moderate current densities (at the order of mu A/cm(2)), the current density of this new catalyst is three orders of magnitude higher. Replacing commercial carbon support by hydrothermally synthesized Ti4O7 significantly enhanced the activity to be close to that of carbon -supported platinum. Although its conductivity and surface area were not sufficient for an accurate evaluation of its activity, these new results demonstrate the possibility of high-performance non-PGM catalysts without carbon supports. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：165 / 172

页数：8

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