Effect of heat treatment on the redox properties of iron porphyrins adsorbed on high area carbon in acid electrolytes: an in situ Fe K-edge X-ray absorption near-edge structure study
Article Abstract:
An in situ Fe K-edge X-ray absorption near-edge structure study was conducted to examine the effect of heat treatment on an iron porphyrin 5,10,15,20-tetrakis(4methoxyphenyl)-21H,23H-porphine iron (III) chloride (FeTMPPCl) molecularly dispersed on a high area carbon black (BP). The heat-treated FeTMPPCl/BP was found to display monotonic shifts in the absorption edge toward higher energies as the potential increases over 1 V. The overall magnitude of the shift was relatively similar to that obtained with non-heat-treated FeTMPPCl/BP.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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In situ x-ray absorption of a carbon monoxide-iron porphyrin adduct absorbed on high-area carbon in an aqueous electrolyte
Article Abstract:
A study was conducted to analyze the electronic and electrochemical characteristics of a carbon monoxide-iron porphyrin adduct adsorbed on Black Pearls high-area carbon. X-ray absorption near-edge structure were determined at beamline 4-1. In addition, the fluorescence intensity was observed at a fixed energy. Experimental results indicated that dissociation of the adduct correlated with the polarization of the electrode at more positive potentials.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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X-ray induced photocurrents at the metal/solution interface
Article Abstract:
The acquisition of X-ray absorption spectra of electrodes fully immersed in an electrolyte solution by monitoring the energy dependence of X-ray induced photocurrents are described. The dependence of the X-ray induced photocurrent on chopping frequency and electrode potential is found to be consistent with a temperature modulation of the rate of the interfacial electron transfer, rather than electron photoemission.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2000
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