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Capillary Electrophoresis Assisted Flow System for In Situ Analysis of Products of Heterogeneous Electrocatalytic and Catalytic Processes: Application to the Oxidation of Glycerol
Author(s) -
Lopes Fernando Silva,
Nogueira Thiago,
do Lago Claudimir Lucio,
Gutz Ivano G. R.
Publication year - 2011
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201100321
Subject(s) - capillary electrophoresis , electropherogram , electrocatalyst , chemistry , glycerol , catalysis , electrochemistry , electrode , formate , flow injection analysis , inorganic chemistry , chemical engineering , analytical chemistry (journal) , chromatography , detection limit , organic chemistry , engineering
Analysis by capillary electrophoresis (CE) of nanoliter samples taken 0.05 mm away from the electrode/solution interface assisted in the evaluation of glycerol electrooxidation on noble metals (Pt, Au and Pd). The fully automated all electrochemical flow system generates a conductometric electropherogram every few minutes, while exploring experimental parameters. Products like glycerate, glycolate, formate and hydroxymalonate were observed in different ratios by changing the electrocatalyst and the applied potential. On Pd, dissolved oxygen oxidizes glycerol at zero current. This new approach holds promise for fast in situ study of reaction products of heterogeneous catalysis reactions and electrode processes in general.