Electrochemical Deposition of CoPt Alloy Thin Film and Its Abnormal Infrared Effects

Authors

Qing-song CHEN, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China;
Guo-cong GUO, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China;
Shi-gang SUN, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;Follow

Corresponding Author

Shi-gang SUN(sgsun@xmu.edu.cn)

Abstract

Nanostructured CoPt alloy thin film was deposited on glassy carbon substrate (denoted as CoPt/GC) under cyclic voltammetric conditions. SEM studies demonstrated that the CoPt/GC was composed of nonuniform nanoparticles with an average size of 139 nm. The composition of the CoPt/GC was analyzed by energy dispersive X-ray spectroscopy (EDS), which depicts a Co:Pt ratio of ca. 3:5. In situ FTIR spectroscopy employing CO adsorption as a probe reaction revealed that the CoPt/GC exhibits abnormal infrared effects (AIREs). The unique anomalous IR features of CO adsorbed (CO_ad) on CoPt/GC consist in the complete inversion of the CO_ad IR bands, the significant enhancement of IR absorption of CO_ad, and the broadening of the CO_ad IR bands. The current investigation has extended the study of AIREs to nanomaterials of alloy of iron family and Pt group, which is of great importance to reveal the relationship among peculiar optical properties and surface composition, structure of nanomaterials, and shed valuable insights into understanding the nature of anomalous IR properties.

Graphical Abstract

Keywords

CoPt alloy, thin film, abnormal infrared effects, in situ FTIRS

DOI Link

https://doi.org/10.13208/j.electrochem.131163

Publication Date

2014-10-28

Online Available Date

2014-03-17

Revised Date

2014-03-12

Received Date

2013-12-12

Recommended Citation

Qing-song CHEN, Guo-cong GUO, Shi-gang SUN. Electrochemical Deposition of CoPt Alloy Thin Film and Its Abnormal Infrared Effects[J]. Journal of Electrochemistry, 2014 , 20(5): 410-415.
DOI: 10.13208/j.electrochem.131163
Available at: https://jelectrochem.xmu.edu.cn/journal/vol20/iss5/3