Nanostructured Composite Catalyst for Electrochemical Water Splitting: Significantly Improved for Hydrogen Evolution Reaction

Sensor Letters Pub Date : 2020-11-01 DOI:10.1166/sl.2020.4293

Abdul Qayoom Mugheri, Muhammad Soomar Samtio, S. Memon

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Abstract

The evolutionary and rational design we incorporated for an efficient nonprecious metal nanocom-posite electrocatalysts for the hydrogen production which is a scientific challenge in the field of renewable energy. Herein, we report a simple and very active, the functional electrocatalyst for water oxidation which is highly demanded. It is of great prime importance for hydrogen evolution reaction (HER) which significantly contributes to renewable technologies. The values for electrocatalysts are NiCo2O4 and NiCo2O3/P Tafel slope 66 and 42 mV/decade and overpotential of 382 and 320 mV and current density achieved at 10 mA/cm2 anin 1.0 M KOH. The composites are characterized by SEM, HR-TEM, X-ray diffraction, XPS, and SAED. The NiCo2O3/P having high durability measured for 50 hours and its EIS results holding a small charge transfer resistance 28.81 Ohms (Ω) and capacitance containing 0.81 mF. Finally, we give an outlook for the development of these nanoma-terials in the short- and mid-term, highlighting the critical challenges to confront for a lab-to-real life transition of these highly promising nanocomposites.

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电化学水分解纳米复合催化剂:显着改善析氢反应

采用进化和合理的设计，设计了一种高效的非贵金属纳米复合电催化剂，用于制氢，这是可再生能源领域的一个科学挑战。本文报道了一种简单、活性高、功能性强的水氧化电催化剂。析氢反应对可再生能源技术的发展具有重要意义。电催化剂NiCo2O4和NiCo2O3/P的Tafel斜率分别为66和42 mV/decade，过电位分别为382和320 mV，电流密度为10 mA/cm2，电流密度为1.0 M KOH。采用SEM、HR-TEM、x射线衍射、XPS和SAED对复合材料进行了表征。NiCo2O3/P具有50小时的高耐久性，其EIS结果具有28.81欧姆的小电荷转移电阻(Ω)和含有0.81 mF的电容。最后，我们对这些纳米材料的短期和中期发展进行了展望，强调了这些极具前景的纳米复合材料从实验室到现实生活过渡所面临的关键挑战。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sensor Letters 工程技术-电化学

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.