ON THE HYDROGEN EVOLUTION DURING THE ELECTROCHEMICAL OXIDATION OF ALDEHYDES AT IB METALS

被引：40
|
作者：
ANASTASIJEVIC, NA [1 ]
BALTRUSCHAT, H [1 ]
HEITBAUM, J [1 ]
机构：
[1] UNIV WITTEN HERDECKE,INST PHYS CHEM,STOCKUMER STR 10,O-5810 WITTEN,GERMANY
来源：
ELECTROCHIMICA ACTA | 1993年 / 38卷 / 08期
关键词：
FORMALDEHYDE; ON LINE MASS SPECTROMETRY; COPPER ELECTRODE; SILVER ELECTRODE; GOLD ELECTRODE;
D O I：
10.1016/0013-4686(93)80214-K
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The amount of hydrogen evolved during the oxidation of formaldehyde at Ib electrodes was determined as a function of the potential. The current efficiency (amount of H-2 per two anodic electrons) can exceed 100% suggesting a reaction sequence which involves the (non-electrochemical) dissociation of a formaldehyde molecule into H-2 and HCOO-. Further suppport for such a potential dependent and heterogeneously catalyzed chemical reaction is given by isotope experiments. Smaller amounts of hydrogen are also evolved during the oxidation of acetaldehyde and propionaldehyde, showing that the release of a hydrogen molecule can also be coupled to electrochemical oxidation.
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页码：1067 / 1072
页数：6
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