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在多金属氧酸盐纳米颗粒修饰的金电极上进行水的电催化氧化。

Electrocatalytic oxidation of water at a polyoxometalate nanoparticle modified gold electrode.

作者信息

Mahanta Abhinandan, Barman Koushik, Jasimuddin Sk

机构信息

Department of Chemistry, Assam University Silchar Assam-788011 India

Department of Chemistry, The University of Utah Salt Lake City Utah 84112-0850 USA.

出版信息

RSC Adv. 2019 Nov 26;9(66):38713-38717. doi: 10.1039/c9ra07450c. eCollection 2019 Nov 25.

DOI:10.1039/c9ra07450c
PMID:35540240
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9076066/
Abstract

Spherical polyoxometalate nanoparticles, [HPMo]NPs, were synthesized from a very well known Keggin-type polyoxometalate [HPMoO] in the presence of sodium dodecyl sulphate (SDS) and polyvinyl pyrrolidine (PVP) in aqueous medium and characterized by UV-Vis spectroscopy and Transmission Electron Microscopy (TEM). The [HPMo]NPs were used to modify a gold working electrode and they were characterized by SEM, EDX, elemental mapping, cyclic voltammetry and electrochemical impedance spectroscopy and applied for the electrocatalytic oxidation of water in a phosphate buffer solution at neutral pH. The modified electrode showed excellent electrocatalytic activity towards oxidation of water at an impressively low overpotential ∼350 mV with a high current density of around 1.7 mA cm, good stability under exhaustive electrolysis conditions and also showed long term stability.

摘要

球形多金属氧酸盐纳米颗粒[HPMo]NPs，是在水介质中，由一种广为人知的Keggin型多金属氧酸盐[HPMoO]，在十二烷基硫酸钠（SDS）和聚乙烯吡咯烷酮（PVP）存在的情况下合成的，并通过紫外可见光谱和透射电子显微镜（TEM）进行了表征。[HPMo]NPs用于修饰金工作电极，并通过扫描电子显微镜（SEM）、能量散射X射线谱（EDX）、元素映射、循环伏安法和电化学阻抗谱对其进行了表征，并应用于中性pH值的磷酸盐缓冲溶液中水电催化氧化。修饰电极在约350 mV的极低过电位下对水的氧化表现出优异的电催化活性，电流密度约为1.7 mA cm，在彻底电解条件下具有良好的稳定性，并且还表现出长期稳定性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e9e6/9076066/2551ab8c8cfc/c9ra07450c-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e9e6/9076066/8540942de9ac/c9ra07450c-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e9e6/9076066/a39c4eb68c97/c9ra07450c-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e9e6/9076066/60caacb6688f/c9ra07450c-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e9e6/9076066/69cd96bc544f/c9ra07450c-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e9e6/9076066/2551ab8c8cfc/c9ra07450c-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e9e6/9076066/8540942de9ac/c9ra07450c-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e9e6/9076066/a39c4eb68c97/c9ra07450c-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e9e6/9076066/60caacb6688f/c9ra07450c-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e9e6/9076066/69cd96bc544f/c9ra07450c-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e9e6/9076066/2551ab8c8cfc/c9ra07450c-s1.jpg

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