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首页> 外文会议>International Symposium on Chemical and Biological Sensors and Analytical Methods II, 2001 >ANOMALOUS RESPONSES OF GOLD SENSOR ELECTRODES DUE TO THE PRESENCE OF METASTABLE SURFACE STATES
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ANOMALOUS RESPONSES OF GOLD SENSOR ELECTRODES DUE TO THE PRESENCE OF METASTABLE SURFACE STATES

机译：由于存在亚稳态的表面态，金传感器电极的异常反应

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摘要

Anomalous voltammetric responses, i.e. quasi-reversible redox transitions within the double layer region, have been reported earlier by at least two groups working on the development of gold microsensor electrodes. The responses in question, which appeared in the absence of dissolved analytes, were attributed to the presence of impurities. It is demonstrated here that such behaviour reflects the presence at the interface of non-equilibrium, superactive, metastable states of gold. Such states are quite common; they are often produced in electrode fabrication or pretreatment processes and are closely related to surface active site and electrocatalytic behaviour. Non-equilibrium surface state responses are not confined to gold; the states in question are surprisingly persistent but may be removed by careful annealing or selective dissolution pretreatments.
机译：至少有两个小组致力于金微传感器电极的开发，较早地报道了伏安反应异常，即在双层区域内的准可逆氧化还原转变。在没有溶解分析物的情况下出现的有问题的响应归因于杂质的存在。在此证明，这种行为反映了金的非平衡，超活性，亚稳定状态的界面处的存在。这种状态很常见。它们通常在电极制造或预处理过程中生产，并且与表面活性部位和电催化行为密切相关。非平衡表面状态响应不仅仅局限于金；反之亦然。所讨论的状态令人惊讶地持久，但是可以通过仔细退火或选择性溶解预处理将其除去。

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