Electrooxidation of ethanol on silver-reduced graphene oxide (Ag/rGO) surface – Effect of alloying with palladium

IF 2.4 4区化学 Q4 ELECTROCHEMISTRY

International Journal of Electrochemical Science Pub Date : 2025-07-28 DOI:10.1016/j.ijoes.2025.101141

Vhahangwele Mudzunga , Olayemi J. Fakayode , Bakang M. Mothudi , Touhami Mokrani , Nobanathi Wendy Maxakato , Rudzani Sigwadi

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Abstract

The study examined the impact of alloying palladium (Pd) with silver-reduced graphene oxide (AgrGO) nanocomposites on ethanol electrooxidation. The electrocatalysts were synthesised using wet chemical method and characterized using conventional spectroscopic and microscopic techniques. The Pd₁Ag₁rGO composite demonstrated superior performance compared to Pd₂Ag₁rGO and AgrGO, attributed to its relatively smaller particle size of 5.3 nm, which enhances catalytic activity, a higher density of defects for better electron transfer, and improved electrochemical properties. It achieved an impressive exchange current density of 1.70 µA cm⁻², indicating rapid reaction kinetics, alongside lower charge transfer resistance. This research highlights the potential of Pd₁/Ag₁-rGO nanocomposites as an alternative to platinum electrocatalyst for efficient ethanol oxidation, supporting advancements in sustainable fuel cell technologies.

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乙醇在银还原氧化石墨烯（Ag/rGO）表面的电氧化——与钯合金化的影响

该研究考察了钯（Pd）与银还原氧化石墨烯（aggo）纳米复合材料合金化对乙醇电氧化的影响。采用湿化学方法合成电催化剂，并用常规的光谱和显微技术对其进行表征。与Pd2Ag1rGO和aggo相比，Pd1Ag1rGO复合材料具有更优越的性能，因为其相对较小的粒径（5.3 nm）增强了催化活性，具有更高的缺陷密度以获得更好的电子转移，并且改善了电化学性能。它达到了令人印象深刻的1.70 µA cm⁻²的交换电流密度，表明快速的反应动力学，以及较低的电荷转移阻力。这项研究强调了Pd1/Ag1-rGO纳米复合材料作为高效乙醇氧化铂电催化剂的替代品的潜力，支持可持续燃料电池技术的进步。

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来源期刊

International Journal of Electrochemical Science 工程技术-电化学

CiteScore

3.00

自引率

20.00%

发文量

714

审稿时长

2.6 months

期刊介绍： International Journal of Electrochemical Science is a peer-reviewed, open access journal that publishes original research articles, short communications as well as review articles in all areas of electrochemistry: Scope - Theoretical and Computational Electrochemistry - Processes on Electrodes - Electroanalytical Chemistry and Sensor Science - Corrosion - Electrochemical Energy Conversion and Storage - Electrochemical Engineering - Coatings - Electrochemical Synthesis - Bioelectrochemistry - Molecular Electrochemistry