Abnormal infrared effects of nanometer scale thin film material of PtPd alloy in CO adsorption

被引：12

作者：

Chen, Z ^{[1
]}

Sun, SG ^{[1
]}

Ding, N ^{[1
]}

Zhou, ZY ^{[1
]}

机构：

[1] Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

来源：

CHINESE SCIENCE BULLETIN | 2001年 / 46卷 / 17期

基金：

中国国家自然科学基金;

关键词：

nm-PtPd/GC; STM; in situ FTIRS; AIREs;

D O I：

10.1007/BF03187026

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Nanometer scale thin film material of PtPd alloy supported on glassy carbon (nm-PtPd/GC) was prepared by the electrochemical codeposition method under cyclic voltammetric conditions. STM patterns demonstrated that the prepared thin films are composed of layered crystallites in elliptic form. Electrochemical in situ FTIRS studies explored the abnormal infrared effects (AIREs) of mn-PtPd/GC for CO adsorption, which are (i) the remarkable enhancement of IR absorption, (ii) the inversion Of COad band direction, and (iii) notable increase in the full width at half maximum (FWRM) Of COad bands. The results demonstrated also that the enhancement factor of IR absorption varies with the thickness of PtPd alloy film and has reached a maximum value of 38.3 under the experimental conditions.

引用

页码：1439 / 1442

页数：4

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