Partially embedded highly dispersed Pt nanoparticles in mesoporous carbon with enhanced leaching stability

被引：18

作者：

Scholz , Kerstin ^{[1
,2
]}

Scholz, Jan ^{[1
]}

McQuillan, A. James ^{[1
]}

Wagner, Gerald ^{[3
]}

Klepel, Olaf ^{[2
,4
]}

机构：

[1] Univ Otago, Dept Chem, Dunedin 9054, New Zealand

[2] Univ Leipzig, Inst Tech Chem, D-04103 Leipzig, Germany

[3] Univ Leipzig, Inst Mineral Kristallog & Mat Wissensch, D-04103 Leipzig, Germany

[4] Hsch Lausitz FH, Fachbereich Bio Chem & Verfahrenstech, D-01958 Senftenberg, Germany

来源：

CARBON | 2010年 / 48卷 / 06期

关键词：

METHANOL FUEL-CELLS; NANOSCALE PLATINUM(0) CLUSTERS; PT/C CATALYTIC CATHODE; GLASSY-CARBON; DURABILITY ENHANCEMENT; SURFACE-CHEMISTRY; OXYGEN REDUCTION; ACTIVATED CARBON; MOLECULAR-SIEVES; METAL-CATALYSTS;

D O I：

10.1016/j.carbon.2010.01.021

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：

Mesoporous carbon materials with highly dispersed platinum nanoparticles have been prepared by a one-pot template-assisted synthesis route. Different amounts of hexachloroplatinic acid were added to a silica-sucrose mixture and heat treated in nitrogen and hydrogen flow. The obtained Pt/C materials have been investigated by means of transmission electron microscopy, X-ray photoelectron spectroscopy, nitrogen adsorption at 77 K, thermo gravimetric analysis, powder X-ray diffraction, and infrared monitored CO adsorption experiments. Further, Pt/C materials have been used in the liquid-phase oxidation of glucose to gluconic acid to determine their catalytic performance. It has been found that the platinum nanoparticles are partially embedded in the carbon material. However, the Pt sites are accessible for adsorption, and the Pt/C catalysts show good catalytic activity compared to materials prepared by impregnation/reduction. The partial embedding of the Pt nanoparticles accounts for the enhanced leaching stability of the Pt phase during long-term use. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1788 / 1798

页数：11

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