Preferential oxidation of carbon monoxide catalyzed by platinum nanoparticles in mesoporous silica

被引：169

作者：

Fukuoka, Atsushi

Kimura, Jun-ichi

Oshio, Tadashi

Sakamoto, Yuzuru

Ichikawa, Masaru

机构：

[1] Hokkaido Univ, Contribut Catalysis Res Ctr, Sapporo, Hokkaido 0010021, Japan

[2] Hokkaido Univ, Grad Sch Sci, Sapporo, Hokkaido 0600810, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2007年 / 129卷 / 33期

关键词：

D O I：

10.1021/ja0703123

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Preferential oxidation (PROX) of CO is an important practical process to purify H-2 for use in polymer electrolyte fuel cells. Although many supported noble metal catalysts have been reported so far, their catalytic performances remain insufficient for operation at low temperature. We found that Pt nanoparticles in mesoporous silica give unprecedented activity, selectivity, and durability in the PROX reaction below 353 K. We also studied the promotional effect of mesoporous silica in the Pt-catalyzed PROX reaction by infrared spectroscopy using the isotopic tracer technique. Gas-phase O-2 is not directly used for CO oxidation, but the oxygen of mesoporous silica is incorporated into CO2. These results suggest that CO oxidation is promoted by the attack of the surface OH groups to CO on Pt without forming water.

引用

收藏

页码：10120 / 10125

页数：6

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