Hydrogen spillover on CeO2/Pt:: Enhanced storage of active hydrogen

被引：101

作者：

Dutta, Gargi ^{[1
]}

Waghmare, Umesh V. ^{[1
]}

Baidya, Tinku ^{[2
]}

Hegde, M. S. ^{[2
]}

机构：

[1] Jawaharlal Nehru Ctr Adv Sci Res, Theoret Sci Unit, Bangalore 560064, Karnataka, India

[2] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

来源：

CHEMISTRY OF MATERIALS | 2007年 / 19卷 / 26期

关键词：

D O I：

10.1021/cm071330m

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：

We have investigated the concept of hydrogen spillover by a density functional theory (DFT) approach in combination with experimental observations. A H/Pt molar ratio of 5 to 9 is observed over Ce1-xPtO2-delta catalyst, where Pt is present in the +2 ionic state. The total hydrogen adsorbed over the catalyst is -30 times higher than that over nano-Pt metal particles. NMR study show protonic hydrogen over the catalyst. DFT calculations indeed support the enhanced adsorption of hydrogen on the Pt-ion-doped ceria surface via spillover to the oxide support. Further, the calculations confirm the formation of protonic hydrogen on the catalyst surface in contrast to the formation of hydridic hydrogen on Pt metal.

引用

页码：6430 / 6436

页数：7

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