Abstract
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. Electrochemicalin situ FTIRS studies explored the abnormal infrared effects (AIREs) of nm-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 (FWHM) 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.
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References
Appleby, A. J., Foulkes, F. R., Fuel Cell Handbook, New York: Van Nostrand Reinhold, 1989.
Nomura, K., Noro, K., Nakamura, Y. et al., Pd-Pt bimetallic catalyst supported on SAPO-5 for catalytic combustion of diluted methane in the presence of water vapor, Catalysis Letters, 1998, 53(3–4): 167.
Yasuda, H., Kameoka, T., Sato, T. et al., Sulfur-tolerant Pd-Pt/ Al2O3-B2O3 catalyst for aromatic hydrogenation, Applied Catalysis, A, General, 1999, 185: 199.
Lu, G. Q., Sun, S. G., Chen, S. P. et al., Novel properties of dispersed Pt and Pd thin layer supported on GC for CO adsorption studied usingin situ MS-FTIR spectroscopy, J. Electroanal. Chem., 1997, 421: 19.
Lu, G. Q., Sun, S. G., Cai, L. R. et al.,In situ FTIR spectroscopic studies of adsorption of CO, SCN− and poly(o-phenylendiamine) on electrodes of nanometer thin films of Pt, Pd and Rh: Abnormal infrared effects (AIREs), Langmuir, 2000, 16: 778.
Lin, W. F., Sun, S. G.,In situ FTIRS investigations of surface processes of Rh electrode—Novel observation of twin adsorbates of carbon monoxide on rhodium electrode in acid solution, ElectrochimicaActa, 1996, 41(6): 803.
Cai, L. R., Sun, S. G., Xia, S. Q. etc., Particular properties and structure of electrochemically prepared Pd film nanomaterials, Acta Physico-Chimica Sinica (in Chinese), 1999, 15(11): 1023.
Zheng, M. S., Abnormal infrared effects of nanometer thin film materials of Ru and PtRu alloy towards CO and SCN−adsorption in acid and alkaline solutions, Diploma Thesis for the Degree of Master of Science (in Chinese), Xiamen University, 2000.
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Chen, Z., Sun, S., Ding, N. et al. Abnormal infrared effects of nanometer scale thin film material of PtPd alloy in CO adsorption. Chin.Sci.Bull. 46, 1439–1442 (2001). https://doi.org/10.1007/BF03187026
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DOI: https://doi.org/10.1007/BF03187026