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在碱性溶液中用氧化镍纳米颗粒修饰玻碳电极促进电化学析氧

Boosting the Electrochemical Oxygen Evolution with Nickel Oxide Nanoparticle-Modified Glassy Carbon Electrodes in Alkaline Solutions.

作者信息

Alharthi Alwaleed M, Hazazi Omar A, Al Jahdaly Badreah A, Kassem Mohammed A, Awad Mohamed I

机构信息

Chemistry Department, Faculty of Science, Umm Al-Qura University, Makkah 24382, Saudi Arabia, Saudi Arabia.

Chemistry Department, Faculty of Science, Benha University, Benha 13518, Egypt.

出版信息

ACS Omega. 2024 Aug 3;9(32):34927-34937. doi: 10.1021/acsomega.4c04700. eCollection 2024 Aug 13.

DOI:10.1021/acsomega.4c04700
PMID:39157089
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11325420/
Abstract

The present work investigates the electrocatalysis of oxygen evolution (OE) on a glassy carbon electrode modified with nickel oxide nanoparticles (NPs) (nano-Ni) in an alkaline solution. The nano-Ni is electrodeposited from an acidic sulfate electrolyte containing various additives, such as glucose, glycerol, and dimethyl glyoxime. The NPs are characterized morphologically and electrochemically using scanning electron microscopy and cyclic voltammetry. The elemental composition and electronic state of the modified electrodes were analyzed using X-ray photoelectron spectroscopy. A considerable enhancement in electrocatalytic activity, depending on the additives used, is observed. The study also explores the effect of nickel oxide loading to optimize the process. The highest cathodic shift in the onset potential of the oxygen evolution reaction is achieved with nickel oxide deposited in the presence of ethylene glycol.

摘要

本工作研究了在碱性溶液中，用氧化镍纳米颗粒（NPs）（纳米镍）修饰的玻碳电极上的析氧电催化作用。纳米镍是从含有各种添加剂（如葡萄糖、甘油和丁二酮肟）的酸性硫酸盐电解质中电沉积得到的。使用扫描电子显微镜和循环伏安法对纳米颗粒进行形态和电化学表征。用X射线光电子能谱分析修饰电极的元素组成和电子态。观察到根据所用添加剂的不同，电催化活性有显著提高。该研究还探讨了氧化镍负载量对优化该过程的影响。在乙二醇存在下沉积的氧化镍实现了析氧反应起始电位的最大阴极位移。

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