乙二醇
电催化剂
草酸
铂金
化学
催化作用
单层
乙烯
无机化学
乙醇酸
电化学
电极
核化学
物理化学
有机化学
细菌
乳酸
生物
生物化学
遗传学
作者
Roberto Alves de Lima,Valdecir Antônio Paganin,T. Iwasita,W. Vielstich
标识
DOI:10.1016/j.electacta.2003.05.004
摘要
In the present paper, PtRu electrodes are used to study the electrooxidation of ethylene glycol (EG) in acid medium. The voltammetric results show that current–potential curves are shifted by about 0.2 V towards more negative potentials through the promoting effect of Ru on Pt. As in the case of pure platinum, FTIR spectra on PtRu surfaces prove that CO2, glycolic acid and, possibly, oxalic acid are formed in parallel reactions. The catalytic activity, measured as the current density at constant potential, increases with the Ru content. But the complete oxidation of EG to CO2 is favored by a high Pt content. In order to compare the catalytic activity of different PtRu compositions, currents measured at electrodeposited electrodes are normalized using the data for the oxidation of a CO monolayer. Results of a test using a laboratory PEM EG/O2 cell with Pt:Ru (50:50) are presented.
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