Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/23985
Title: The effect of weak Brönsted acids on the electrocatalytic reduction of carbon dioxide by a rhenium tricarbonyl bipyridyl complex
Authors: Wong, KY 
Chung, WH
Lau, CP
Keywords: Brönsted acid
Carbon dioxide
Electrocatalytic reduction
Rhenium complex
Issue Date: 1998
Publisher: Elsevier
Source: Journal of electroanalytical chemistry, 1998, v. 453, no. 1-2, p. 161-170 How to cite?
Journal: Journal of electroanalytical chemistry 
Abstract: The effect of four weak Brönsted acids, 2,2,2-trifluoroethanol, phenol, methanol and water on the electrocatalytic reduction of CO2 by [Re(bpy)(CO)3(py)]2+ (bpy = 2,2′-bipyridine, py = pyridine) in acetonitrile was investigated. The addition of weak Brönsted acids enhances the rate of the catalytic process and improves the lifetime of the rhenium catalyst. Under the experimental conditions employed in this study, CO was produced as the only product with faradaic efficiency close to 100%. Kinetic analysis indicated that the reaction order in acid is 2. The Brönsted acids probably stabilise the rhenium-carbon dioxide intermediate through protonation and facilitate the cleavage of one of the C-O bonds to yield CO. The efficiency of the acid increases with its acidity. Thus, trifluoroethanol and phenol are more effective in enhancing the rate of catalysis than methanol and water. Even though the acid strength of water and methanol are very similar, water is much less effective in enhancing the rate of CO2 reduction. This can be attributed to the relatively strong ligating property of water, which would compete with CO2 for the binding site on rhenium.
URI: http://hdl.handle.net/10397/23985
ISSN: 0022-0728
DOI: 10.1016/S0022-0728(98)00116-8
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

49
Last Week
0
Last month
0
Citations as of Oct 11, 2017

WEB OF SCIENCETM
Citations

48
Last Week
0
Last month
2
Citations as of Oct 16, 2017

Page view(s)

62
Last Week
5
Last month
Checked on Oct 16, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.