Preliminary Investigation of Iron Protoporphyrin SAMs on Platinum Electrodes by Surface Enhanced Vibrational Spectroscopies

Authors

Min MA
Yao-yue YANG
Han-xuan ZHANG
Wen-bin CAI

Corresponding Author

Wen-bin CAI(wbcai@fudan.edu.cn)

Abstract

In situ SERS and ATR-SEIRAS were applied to investigate the electrochemical and structural properties of iron protoporphyrin IX (FePP) self-assembled monolayers (SAMs) on Pt electrodes in 0. 1 mol· L -1 HClO4. The potential dependent SERS spectra of the FePP SAM on a roughened Pt electrode with the enhancement factor of ca. 40 were acquired with the excitation line of 514 nm. Analyses of SERS data over the potential region from 0. 5 to -0. 3 V enabled to obtain potential dependent adsorption isotherms,from which the formal redox potential could be estimated to be ca. - 0. 2 V. Up-tilted orientation of FePP SAM on Pt film electrode involving one peripheral propionate group attached to the surface and one propionic acid group hydrogenbonded with adjacent FePP,was deduced based on in situ ATR-SEIRAS results,without significant structural change over the potential region from -0. 1 to 0. 9 V.

Keywords

SERS, SEIRAS, iron protoporphyrin IX, SAM, Pt electrodes

DOI Link

https://doi.org/10.61558/2993-074X.3355

Publication Date

2010-08-28

Online Available Date

2010-08-28

Revised Date

2010-08-28

Received Date

2010-08-28

Recommended Citation

Min MA, Yao-yue YANG, Han-xuan ZHANG, Wen-bin CAI. Preliminary Investigation of Iron Protoporphyrin SAMs on Platinum Electrodes by Surface Enhanced Vibrational Spectroscopies[J]. Journal of Electrochemistry, 2010 , 16(3): Article 9.
DOI: 10.61558/2993-074X.3355
Available at: https://jelectrochem.xmu.edu.cn/journal/vol16/iss3/9

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