Department of Chemistry, Faculty of Science, Taibah University, Madinah 3002, Saudi.
Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt.
Int J Mol Sci. 2020 May 27;21(11):3785. doi: 10.3390/ijms21113785.
The catalytic activity of SrPdO, prepared through the sol-gel citrate-combustion method for the oxygen evolution reaction (OER) in a 0.1 M HClO solution, was investigated. The electrocatalytic activity of SrPdO toward OER was assessed via the anodic potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The glassy carbon modified SrPdO (GC/SrPdO) electrode exhibited a higher electrocatalytic activity, by about 50 times, in comparison to the unmodified electrode. The order of the reaction was close to unity, which indicates that the adsorption of the hydroxyl groups is a fast step. The calculated activation energy was 21.6 kJ.mol, which can be considered a low value in evaluation with those of the reported OER electrocatalysts. The SrPdO perovskite portrayed a high catalyst stability without any probability of catalyst poisoning. These results encourage the use of SrPdO as a candidate electrocatalyst for water splitting reactions.
采用溶胶-凝胶柠檬酸燃烧法制备的 SrPdO 用于在 0.1 M HClO 溶液中析氧反应 (OER)，研究了其催化活性。通过阳极动电位极化和电化学阻抗谱 (EIS) 评估了 SrPdO 对 OER 的电催化活性。与未改性电极相比，玻璃碳修饰 SrPdO（GC/SrPdO）电极表现出更高的电催化活性，约提高了 50 倍。反应级数接近 1，表明羟基的吸附是一个快速步骤。计算出的活化能为 21.6 kJ·mol，与报道的 OER 电催化剂相比，这可以被认为是一个较低的值。钙钛矿 SrPdO 表现出高的催化剂稳定性，没有催化剂中毒的可能性。这些结果鼓励使用 SrPdO 作为水分解反应的候选电催化剂。
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