Lattice-confined Ru clusters with high CO tolerance and activity for the hydrogen oxidation reaction

被引：444

作者：

Zhou, Yuanyuan ^{[1
]}

Xie, Zhenyang ^{[1
]}

Jiang, Jinxia ^{[1
]}

Wang, Jian ^{[1
]}

Song, Xiaoyun ^{[1
]}

He, Qian ^{[1
]}

Ding, Wei ^{[1
]}

Wei, Zidong ^{[1
]}

机构：

[1] Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Coll Chem & Chem Engn, Chongqing, Peoples R China

来源：

NATURE CATALYSIS | 2020年 / 3卷 / 05期

基金：

中国国家自然科学基金;

关键词：

ANODE CATALYST; ALKALINE MEDIA; FUEL-CELLS; PT-RU; NANOPARTICLES; MECHANISM; CARBON; ELECTROCATALYSTS; PEMFC;

D O I：

10.1038/s41929-020-0446-9

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：

An efficient catalyst for the hydrogen oxidation reaction (HOR) must maintain an oxide-free metal surface in a relatively high potential range. This requirement automatically excludes ruthenium because it is susceptible to oxidation in the hydrogen adsorption/desorption potential region. Herein we report Ru clusters partially confined in the lattice of urchin-like TiO2 crystals (Ru@TiO2) that can effectively catalyse the HOR up to a potential of 0.9 V-RHE with a mass activity higher than that of a PtRu catalyst under both acidic and basic conditions. Moreover, the HOR activity of this Ru@TiO2 catalyst is not affected by 1,000 ppm CO impurity. Even at a high CO content of 10 vol%, Ru@TiO2 still selectively catalyses the HOR. Confined Ru clusters grow along the lattice of TiO2 with abundant Ru-Ti bond formation. Such atomically connected co-crystals offer efficient electron penetration from electron-rich TiO2 to Ru metal, leading to sluggish CO adsorption kinetics during the HOR.

引用

页码：454 / 462

页数：9

共 40 条

[1] Selective CO Methanation on Highly Active Ru/TiO2 Catalysts: Identifying the Physical Origin of the Observed Activation/Deactivation and Loss in Selectivity [J].