Document Detail


Surface-enhanced infrared absorption spectroscopic studies of adsorbed nitrate, nitric oxide, and related compounds 2: Nitrate ion adsorption at a platinum electrode.
MedLine Citation:
PMID:  18324856     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The adsorbed species formed from the nitrate ion were examined using surface-enhanced infrared absorption spectroscopy (SEIRAS). The main band was observed at 1547-1568 cm-1 at 0.2 V in 0.01 M NaNO3 + 0.1 M HClO4. Although this band is close to that assigned to the adsorbed NO in the literature, it is assigned to the N=O stretching vibration of the chelating bidentate form of nitrate for the following reasons. (i) Nitrate gives a single band, while NO has three bands independent of the coverage. (ii) The band intensity remained constant in the potential range from 0.1 to 0.6 V, while that of the bridged NO at around 1600 cm-1 decreased in this range. (iii) The rate constants for the reduction and/or desorption at negative potentials are about 3 times higher than those of the bridged NO. (iv) The adsorbed species from nitrate is replaced with CO more easily than the bridged NO.
Authors:
Kou Nakata; Yota Kayama; Katsuaki Shimazu; Akira Yamakata; Shen Ye; Masatoshi Osawa
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-03-07
Journal Detail:
Title:  Langmuir : the ACS journal of surfaces and colloids     Volume:  24     ISSN:  0743-7463     ISO Abbreviation:  Langmuir     Publication Date:  2008 Apr 
Date Detail:
Created Date:  2008-04-01     Completed Date:  2008-05-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882736     Medline TA:  Langmuir     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4358-63     Citation Subset:  IM    
Affiliation:
Section of Materials Science, Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Japan.
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MeSH Terms
Descriptor/Qualifier:
Absorption
Adsorption
Carbon Monoxide / chemistry
Electrodes
Ions / chemistry
Kinetics
Nitrates / chemistry*
Nitric Oxide / chemistry*
Oxidation-Reduction
Platinum / chemistry*
Spectrophotometry, Infrared
Surface Properties
Chemical
Reg. No./Substance:
0/Ions; 0/Nitrates; 10102-43-9/Nitric Oxide; 630-08-0/Carbon Monoxide; 7440-06-4/Platinum

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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