Please wait a minute...
Acta Phys. -Chim. Sin.  2002, Vol. 18 Issue (11): 989-993    DOI: 10.3866/PKU.WHXB20021106
Electrochemical In Situ Step-scan Time-resolved Microscope FTIR Spectroscopy
Zhou Zhi-You;Sun Shi-Gang;Chen Sheng-Pei;Si Di;Gong Hui
State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, Xiamen University, Xiamen 361005
Download:   PDF(1736KB) Export: BibTeX | EndNote (RIS)      

Abstract  Electrochemical in situ step-scan time-resolved microscope FTIR spectroscopy (in situ SS-TR-MFTIRS) was successively established, for the first time in the present work, by using a step-scan FTIR instrument (Nexus 870 FTIR spectrometer) and an IR microscope (IR-plane advantage microscope). A homemade signal synchronizer was used to generate polarization potential that is in accordance with the signal-time-sequence of step-scan time-resolved spectral data collection. Due to the use of a nanostructured microelectrode of Pt and the enhancement of IR absorption, a character of abnormal infrared effects of the nanostructured Pt surface, IR determination sensitivity of surface species was significantly increased, and the rate of responding to a polarizing potential of electrode surface in a thin-layer IR cell was remarkably improved. Adsorption of CO on nanostructured Pt microelectrode(Φ=0.2 mm)in sulfuric acid solutions was investigated by using the present new technique, and a spectral time-resolution as fast as 50 μs has been achieved. From the variation versus t of the band center of linear-bonded CO(see Fig.7) that is measured from in situ SS-TR-MFTIR spectra, the cell constant (τ=R1Cd) of an electrochemical thin-layer IR cell of external reflection mode, which is employed widely in studies of electrochemical in situ IR spectroscopy, has been determined to be 0.65 ms. In comparison with the τ of 40 ms for a conventional Pt disk electrode (Φ=6.0 mm),the use of a Pt microelectrode has reduced dramatically the thin-layer IR cell constant to about 61 times. The results obtained in the current paper is of importance in illustrating the success of establishing the in situ SS-TR-MFTIRS, and demonstrating the powerful capability of the in situ SS-TR-MFTIRS for studies of fast dynamic processes of electrode and kinetics of reactions taking place at solid/liquid interfaces as well.

Key wordsStep-scan      Time-resolved IR spectroscopy      IR microscope      Pt microelectrode      CO adsorption     
Received: 10 February 2002      Published: 15 November 2002
Corresponding Authors: Sun Shi-Gang     E-mail:
Cite this article:

Zhou Zhi-You;Sun Shi-Gang;Chen Sheng-Pei;Si Di;Gong Hui. Electrochemical In Situ Step-scan Time-resolved Microscope FTIR Spectroscopy. Acta Phys. -Chim. Sin., 2002, 18(11): 989-993.

URL:     OR

[1] Yuan DUAN,Mingshu CHEN,Huilin WAN. Adsorption and Activation of O2 and CO on the Ni(111) Surface[J]. Acta Phys. -Chim. Sin., 2018, 34(12): 1358-1365.
[2] YANG Fan, ZHANG Jing, WU Wei-Cheng. Hydrogenation Study of Benzene over a Mo2C/γ-Al2O3 Catalyst by In situ IR Spectroscopy[J]. Acta Phys. -Chim. Sin., 2014, 30(5): 943-949.
[3] LI Hui-Juan;JIANG Xiao-Yuan;ZHENG Xiao-Ming. Synthesis of TiO2/[[gamma]]r-Al2O3 and Effect of CuO Loading on NO Reduction[J]. Acta Phys. -Chim. Sin., 2006, 22(05): 584-589.
[4] Chen You-Jiang;Sun Shi-Gang;Gong Hui;Chen Sheng-Pei;Zhou Zhi-You;Li Jun-Tao. Nanostructured Films Prepared on Pt Microelectrode through Square Wave Oxidation-reduction Cycles and Their Particular IR Properties[J]. Acta Phys. -Chim. Sin., 2004, 20(02): 129-133.
[5] Li Hai-Yang,Bao Shi-Ning,Zhang Xun-Sheng,Fan Chao-Yang,Feng Xiao-Song,Xu Ya-Bo. Investigation of CO Adsorption on Cs/Ru(1010) Surface Using ARUPS[J]. Acta Phys. -Chim. Sin., 1996, 12(11): 1001-1005.