Gas-Liquid Interfacial Plasma engineering under dilute nitric acid to improve hydrophilicity and OER performance of nickel foam

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Progress in Natural Science: Materials International Pub Date : 2022-10-01 DOI:10.1016/j.pnsc.2022.10.002

Minju Kim , Jihun Kim , Lusha Qin , Sobin Mathew , Youri Han , Oi Lun Li

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引用次数: 7

Abstract

The world has been moving rapidly to find new eco-friendly energy sources. Water electrolysis consists of two reactions of Oxygen Evolution Reaction (OER) and Hydrogen Evolution Reaction (HER), whereas the OER is considered the rate-limiting step. The most commercialized electrode for OER in the alkaline electrolyte is Ni foam, but its original surface is hydrophobic. It is possible to accelerate the adsorption and desorption process of reactants and products during OER by adding hydrophilic functional groups such as –OH on the surface of Ni foam. In this study, a novel Gas-Liquid Interfacial Plasma (GLIP) engineering at room temperature was successfully applied to modify the Ni foam surface dilute (1 M) HNO₃ solution. At a current density of 400 mA cm⁻², GLIP-treated Ni foam electrodes at 1 M HNO₃ concentrations showed OER overpotentials of 458 mV. Among all, GLIP with 1 M HNO₃ treatment of 30 min showed 129 mV less overpotential than the nickel foam before treatment. In summary, GLIP can be justified as an environmentally friendly and efficient surface treatment to improve the wettability and OER performance of Ni-based electrodes in water electrolysis.

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稀硝酸下气液界面等离子体工程提高泡沫镍的亲水性和OER性能

世界一直在迅速寻找新的环保能源。水电解包括析氧反应(OER)和析氢反应(HER)两个反应，其中析氧反应被认为是析氢反应的限速步骤。在碱性电解液中用于OER的最商业化的电极是泡沫镍，但其原始表面是疏水的。在泡沫镍表面加入-OH等亲水官能团可以加速OER过程中反应物和产物的吸附和解吸过程。在本研究中，一种新型的气液界面等离子体(GLIP)工程在室温下成功地对Ni泡沫表面进行了稀释(1 M) HNO3溶液的改性。在电流密度为400 mA cm−2时，在1 M HNO3浓度下，glip处理的Ni泡沫电极的OER过电位为458 mV。其中，1 M HNO3处理30 min的GLIP过电位比泡沫镍处理前低129 mV。综上所述，GLIP是一种环保、高效的表面处理方法，可以改善镍基电极在水电解中的润湿性和OER性能。

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来源期刊

Progress in Natural Science: Materials International 综合性期刊-综合性期刊

CiteScore

8.60

自引率

2.10%

发文量

2812

审稿时长

49 days

期刊介绍： Progress in Natural Science: Materials International provides scientists and engineers throughout the world with a central vehicle for the exchange and dissemination of basic theoretical studies and applied research of advanced materials. The emphasis is placed on original research, both analytical and experimental, which is of permanent interest to engineers and scientists, covering all aspects of new materials and technologies, such as, energy and environmental materials; advanced structural materials; advanced transportation materials, functional and electronic materials; nano-scale and amorphous materials; health and biological materials; materials modeling and simulation; materials characterization; and so on. The latest research achievements and innovative papers in basic theoretical studies and applied research of material science will be carefully selected and promptly reported. Thus, the aim of this Journal is to serve the global materials science and technology community with the latest research findings. As a service to readers, an international bibliography of recent publications in advanced materials is published bimonthly.