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首页> 外文期刊>International Journal of Electrochemical Science >The Influence of Potential Scanning Rate on the Electrocatalytic Activity of Pyrolysis-treated PdO/Graphene for Ethanol Oxidation Reaction (EOR)
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The Influence of Potential Scanning Rate on the Electrocatalytic Activity of Pyrolysis-treated PdO/Graphene for Ethanol Oxidation Reaction (EOR)

机译：电位扫描速率对热解PdO /石墨烯对乙醇氧化反应（EOR）的电催化活性的影响

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For the first time, the influence of potential scanning rate on the electrocatalytic activity of pyrolysis- treated PdO/Graphene (denoted as PdO/G) was investigated in this work. First, a suspension solutionthat contained PdO and graphene was pyrolyzed under certain conditions, and then the products wereanchored on a glassy carbon (GC) electrode, leading to the formation of pyrolysis-treated PdO/Gcoated GC electrode. Lastly, the resultant electrodes were potentially scanned using cyclicvoltammetry (CV) technique for 50 cycles at various scanning rates in a potential range, yielding fourkinds of CV-treated PdO/G electrodes. In this work, the electrodes obtained at the scan rate of 5, 10,-1 50, 90 mV s were, respectively, denoted as catalyst a, b, c and d. The morphologies of the sampleswere mainly characterized via scanning electron microscope (SEM) and transmission electronmicroscopy (TEM). The electrocatalytic activities of the as-prepared catalysts for ethanol oxidationreaction (EOR) were principally studied by using cyclic voltammetry (CV) and chronoamperometry-1 (CA). The electrochemical results strongly indicated that the catalyst of PdO/G treated by 10 mV sexhibited the best electrocatalytic performance among all the prepared catalysts. The relatively smallerparticle size and higher content of Pd were thought as the major reasons for the excellentelectrocatalytic activity of catalyst b towards EOR when compared to other catalysts.
机译：这项工作首次研究了电势扫描速率对热解处理的PdO /石墨烯（表示为PdO / G）的电催化活性的影响。首先，在一定条件下将含有PdO和石墨烯的悬浮液热解，然后将产物固定在玻璃碳（GC）电极上，从而形成经热解处理的PdO / Gcoated GC电极。最后，使用循环伏安法（CV）技术以电位范围内的各种扫描速率对所得电极进行50个循环的潜在扫描，产生了四种经CV处理的PdO / G电极。在这项工作中，以5、10，-1 50、90 mV s的扫描速率获得的电极分别表示为催化剂a，b，c和d。样品的形貌主要通过扫描电子显微镜（SEM）和透射电子显微镜（TEM）表征。主要通过循环伏安法（CV）和计时电流法-1（CA）研究了所制备催化剂对乙醇氧化反应（EOR）的电催化活性。电化学结果强烈表明，在所有制备的催化剂中，用10 mV的PdO / G催化剂均具有最佳的电催化性能。与其他催化剂相比，认为相对较小的粒径和较高的Pd含量是催化剂b对EOR具有优异电催化活性的主要原因。

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