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In-Situ Monitoring Electrode Surface Reactions Using High-Resolution Desorption Electrospray Ionization Mass Spectrometry (DESI-MS)


EMSL Project ID
34920

Abstract

Probing the real-time chemical processes on the electrode surfaces is crucial for obtaining fundamental understanding of redox mechanisms and the nature of active intermediates involved in electrolysis. Herein we propose to use high-resolution desorption electrospray ionization mass spectrometry (HR-DESI-MS) for characterization of intermediate species involved in electrolysis. The major advantage of using HR-MS over spectroscopic and microscopy methods is that one can obtain accurate mass measurement, determine structures of species involved in reactions and probe their reactivity. The objective of this project is to establish a novel MS-based surface method for monitoring electrochemical reactions and subsequently use it to investigate the kinetics and mechanisms of important electrochemical catalytic reactions such as electrooxidation of methanol, which is critical for constructing methanol fuel cell. The proposed project will utilize HR-MS of EMSL in the need for unambiguous identification of electrochemically altered organometallic complexes.

Project Details

Project type
Large-Scale EMSL Research
Start Date
2009-10-05
End Date
2012-09-30
Status
Closed

Team

Principal Investigator

Hao Chen
Institution
Ohio University

Team Members

Mei Lu
Institution
Ohio University

Pengyuan Liu
Institution
Ohio University

Zhixin Miao
Institution
Ohio University

Yun Zhang
Institution
Ohio University

Julia Laskin
Institution
Purdue University

Alexander Laskin
Institution
Purdue University

Related Publications

Liu P, IT Lanekoff, J Laskin, HD Dewald, and H Chen. 2012. "Study of Electrochemical Reactions Using Nanospray Desorption Electrospray Ionization Mass Spectrometry." Analytical Chemistry 84(13):5737-5743. doi:10.1021/ac300916k
Xu K, YW Zhang, B Tang, J Laskin, PJ Roach, and H Chen. 2010. "Study of Highly Selective and Efficient Thiol Derivatization using Selenium Reagents by Mass Spectrometry." Analytical Chemistry 82(16):6926-6932. doi:10.1021/ac1011602