A highly durable N-enriched titanium nanotube suboxide fuel cell catalyst support

被引：18

作者：

Esfahani, Reza Alipour Moghadam ^{[1
]}

Fruehwald, Holly M. ^{[1
]}

Laschuk, Nadia O. ^{[1
]}

Sullivan, Mason T. ^{[1
]}

Egan, Jacquelyn G. ^{[1
]}

Ebralidze, Iraklii I. ^{[1
]}

Zenkina, Olena V. ^{[1
]}

Easton, E. Bradley ^{[1
]}

机构：

[1] Ontario Tech Univ, Electrochem Mat Lab, Fac Sci, 2000 Simcoe St N, Oshawa, ON, Canada

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2020年 / 263卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

N-enriched titanium nanotube suboxide; Corrosion-resistant support; Oxygen reduction reaction; Fuel cells; Stability and durability; OXYGEN REDUCTION REACTION; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; ELECTROCATALYTIC ACTIVITY; CARBON NANOTUBES; METHANOL OXIDATION; DOPED TIO2; ULTRA-LOW; DURABILITY; PLATINUM; PERFORMANCE;

D O I：

10.1016/j.apcatb.2019.118272

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：

Reduced bandgap metal oxide materials are consider an alternative to carbon black supports for fuel cell catalysts. Here we report a unique N-enriched titanium nanotube suboxide doped with molybdenum (TNTS-Mo) fuel cell catalyst support. The support was prepared by the surface modification of a TNTS-Mo with a terpyridine (TPY) ligand, yielding TPY/TNTS-Mo. We have deposited Pt onto this support and evaluated its activity and stability. The Pt/TPY/TNTS-Mo catalyst was subjected to stringent accelerated stress tests (AST) designed to induce catalyst degradation similar to automotive operation and startup-shutdown conditions. The Pt/TPY/TNTS-Mo was compared with Pt/TNTS-Mo and a benchmark carbon supported Pt catalyst (Pt/C). These stability protocols confirmed that TPY modification greatly enhances the stability and durability of the Pt nanoparticles via strong metal support interaction (SMSI). In addition, the covalently attached TPY layer stabilizes the doped metal oxide supports itself, preventing changes in its surface state and composition at high potentials.

引用

页数：12

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