银、镍、铜电交换制备Pd涂层的氧还原反应研究

IF 2.7 4区化学 Q3 CHEMISTRY, PHYSICAL Electrocatalysis 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

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摘要

采用电交换法在银、镍和铜电极上沉积钯膜，研究了这些双金属电极上的氧还原反应。用x射线光电子能谱分析了在Pd前驱体浴中电替换30 min制备的电极，并用扫描电镜观察了在银衬底上制备的所有Pd涂层的表面形貌。电化学试验表明，在碱性介质中，钯对银的比活性随着沉积时间的增加而增加，钯对镍的比活性在换电30 min后达到平稳状态。在0.1 M KOH条件下，用电替换法研究了镀有钯的Ag、Cu和Ni电极上的电阻率。钯在银上的比活度随着沉积步骤的增加而增加，而钯在镍上的比活度在沉积30 min时达到最大值。

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Oxygen Reduction Reaction Studies on Pd Coatings Prepared by Galvanic Exchange of Silver, Nickel and Copper

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.

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来源期刊

Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY

CiteScore

4.80

自引率

6.50%

发文量

审稿时长

>12 weeks

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