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The effect of the alkali metal cation on the electrocatalytic oxidation of formate on platinum

机译：碱金属阳离子对铂甲酸盐电催化氧化的影响

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Non-covalent interactions between hydrated alkali metal cations and adsorbed oxygenated species on platinum might considerably inhibit some electrocatalytic reactions. We report in this communication the effect exerted by electrolyte alkali metal cations on the electro-oxidation of formate ions on platinum. The system was investigated by means of cyclic voltammetry and chronoamperometry in the presence of an electrolyte containing Li ~(+) , Na ~(+) , or K ~(+) . As already observed for other systems, the general activity towards the electro-oxidation of formate ions was found to increase in the sequence Li ~(+) < Na ~(+) < K ~(+) . In addition, we observed that the inhibition caused by smaller cations has a peculiar potential dependence because of the multi-peaked current profile of the electro-oxidation of formate on platinum. In this respect, we have also identified a new effect caused by cation inhibition at intermediate potentials, namely a peak splitting towards the use of smaller cations. Results are discussed in connection with mechanistic aspects of this model system.
机译：水合碱金属金属阳离子和吸附含氧物质之间的非共价相互作用可能大大抑制了一些电催化反应。我们在该通信中报告了电解质碱金属阳离子对铂甲酸盐离子电氧化施加的效果。通过含有Li〜（+），Na〜（+）或K〜（+）的电解质的电解质存在下的循环伏安法和计时率来研究该系统。如图所示，对于其他系统，发现甲酸甲酸根离子的电氧化的一般活动在序列中增加，序列Li〜（+）

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