Electrocatalysis ( IF 2.7 ) Pub Date : 2023-06-06 , DOI: 10.1007/s12678-023-00831-0 Audris Mihailovs , Markus Otsus , Arvo Kikas , Vambola Kisand , Aile Tamm , Heiki Erikson , Kaido Tammeveski
Palladium coatings are deposited onto bulk silver, nickel and copper electrodes using galvanic exchange to study the oxygen reduction reaction (ORR) on those bimetallic electrodes. The electrodes prepared by galvanic replacement for 30 min in the Pd precursor bath are analysed by X-ray photoelectron spectroscopy and the surface morphology of all Pd coatings prepared onto Ag substrates are examined by scanning electron microscopy. The electrochemical tests show that specific activity of Pd on Ag for ORR in alkaline media increases with deposition time and specific activity of palladium on nickel reaches a plateau after 30 min of galvanic replacement.
Graphical Abstract
ORR was studied in 0.1 M KOH on Ag, Cu and Ni electrodes coated with palladium via galvanic replacement. Specific activity of Pd on Ag increased with each subsequent deposition step, whereas Pd on Ni reached maximum with 30 min.
中文翻译:
银、镍、铜电偶交换制备钯镀层的氧还原反应研究
使用电流交换将钯涂层沉积到块状银、镍和铜电极上,以研究这些双金属电极上的氧还原反应 (ORR)。通过 X 射线光电子能谱分析在 Pd 前驱体浴中电镀置换 30 分钟制备的电极,并通过扫描电子显微镜检查在 Ag 基底上制备的所有 Pd 涂层的表面形态。电化学测试表明,在碱性介质中,钯/银的 ORR 比活性随着沉积时间的延长而增加,钯/镍的比活性在电镀置换 30 分钟后达到稳定水平。
图形概要
在 0.1 M KOH 中,通过电镀置换法研究了涂有钯的 Ag、Cu 和 Ni 电极上的 ORR。 Pd 在 Ag 上的比活性随着每个后续沉积步骤而增加,而 Pd 在 Ni 上的比活性在 30 分钟时达到最大值。