Details:

Alternative Title:
J Phys Chem C Nanomater Interfaces
Publisher's site:
http://dx.doi.org/10.1021/acs.jpcc.5b09777
Personal Author:
Tang, Yongan ; Wang, Zhe ; Chi, Xiaowei ; Sevilla, Michael D. ; Zeng, Xiangqun
Tang, Yongan ; Wang, Zhe ; Chi, Xiaowei ; Sevilla, Michael D. ; Zeng, Xiangqun Less -
Description:
The bis(trifluoromethylsulfonyl)imide anion is widely used as an ionic liquid anion due to its electrochemical stability and wide electrochemical potential window at aerobic conditions. Here we report an innovative strategy by directly oxidizing bis(trifluoromethylsulfonyl)imide anion to form a radical electrocatalyst on platinum electrode at anaerobic condition. The in situ generated radical catalyst was shown to catalytically and selectively promote the electrooxidation of methanol to form methoxyl radical, in which the formation potential was drastically decreased with the existence of bis(trifluoromethylsulfonyl)imide radical. The electrochemically generated radical catalyst not only facilitates the oxidation of methanol but also provides good selectivity. The unique double layer structure of the 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([Bmpy][NTf2]) likely excludes the diffusion of larger molar mass molecules onto the electrode surface and enables the highly selective methanol oxidation at this IL-electrode interface. Cyclic voltammetry (CV) experiments were used to systematically characterize the details of the electrochemical processes with and without methanol in several other ILs, and a mechanism of the chemical and redox processes was proposed. This study provides a promising new approach for utilizing the unique properties of ionic liquids not only as solvents and electrolytes but also as the medium for in situ generation of electrocatalysts to promote methanol redox reactions for practical applications.
Subject:
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Article

Source:
J Phys Chem C Nanomater Interfaces. 120(2):1004-1012.
Pubmed ID:
29034058
Pubmed Central ID:
PMC5640268
Document Type:
Journal Article
Funding:
R01 ES022302/ES/NIEHS NIH HHS/United States ; R01 OH009644/OH/NIOSH CDC HHS/United States
R01 ES022302/ES/NIEHS NIH HHS/United States ; R01 OH009644/OH/NIOSH CDC HHS/United States Less -
Collection(s):
CDC Public Access
Main Document Checksum:
[+]
urn:sha256:9aaac8157970dd699357072e6f1224135e1b37ffdf73744abed366872d386190
File Type:

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