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Title: Direct Comparison of Electrochemical and Spectrochemical Kinetics for Catalytic Oxygen Reduction

Abstract

We describe here a direct comparison of electrochemical and spectrochemical experiments to determine rates and selectivity of oxygen reduction catalyzed by iron 5,10,15,20-meso-tetraphenylporphyrin chloride. Strong agreement was found between the two methods suggesting the same mechanism is occurring under both conditions, with the same overall third order rate constant kcat = (1.1 ± 0.1) × 106 M-2 s-1. This report provides a rare example of characterization of a redox catalytic process by two common but very different methods. This work was supported as part of the Center for Molecular Electrocatalysis, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences.

Authors:
; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1188942
Report Number(s):
PNNL-SA-102821
KC0307010
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of the American Chemical Society, 136(36):12544-12547
Additional Journal Information:
Journal Name: Journal of the American Chemical Society, 136(36):12544-12547
Country of Publication:
United States
Language:
English

Citation Formats

Wasylenko, Derek J., Rodriguez, Carlos, Pegis, Michael L., and Mayer, James M. Direct Comparison of Electrochemical and Spectrochemical Kinetics for Catalytic Oxygen Reduction. United States: N. p., 2014. Web. doi:10.1021/ja505667t.
Wasylenko, Derek J., Rodriguez, Carlos, Pegis, Michael L., & Mayer, James M. Direct Comparison of Electrochemical and Spectrochemical Kinetics for Catalytic Oxygen Reduction. United States. doi:10.1021/ja505667t.
Wasylenko, Derek J., Rodriguez, Carlos, Pegis, Michael L., and Mayer, James M. Wed . "Direct Comparison of Electrochemical and Spectrochemical Kinetics for Catalytic Oxygen Reduction". United States. doi:10.1021/ja505667t.
@article{osti_1188942,
title = {Direct Comparison of Electrochemical and Spectrochemical Kinetics for Catalytic Oxygen Reduction},
author = {Wasylenko, Derek J. and Rodriguez, Carlos and Pegis, Michael L. and Mayer, James M.},
abstractNote = {We describe here a direct comparison of electrochemical and spectrochemical experiments to determine rates and selectivity of oxygen reduction catalyzed by iron 5,10,15,20-meso-tetraphenylporphyrin chloride. Strong agreement was found between the two methods suggesting the same mechanism is occurring under both conditions, with the same overall third order rate constant kcat = (1.1 ± 0.1) × 106 M-2 s-1. This report provides a rare example of characterization of a redox catalytic process by two common but very different methods. This work was supported as part of the Center for Molecular Electrocatalysis, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences.},
doi = {10.1021/ja505667t},
journal = {Journal of the American Chemical Society, 136(36):12544-12547},
number = ,
volume = ,
place = {United States},
year = {2014},
month = {9}
}