Electrodeposition of Ni-Co-S Electrocatalyst Using 2,5-dimercapto-1,3,4-thiadiazole as S Precursor for Hydrogen Evolution Reaction at Neutral pH

IF 2.7 4区化学 Q3 CHEMISTRY, PHYSICAL

Electrocatalysis Pub Date : 2023-07-18 DOI:10.1007/s12678-023-00837-8

Yeosol Yoon, Sehyun Yoo, Taeho Lim

{"title":"Electrodeposition of Ni-Co-S Electrocatalyst Using 2,5-dimercapto-1,3,4-thiadiazole as S Precursor for Hydrogen Evolution Reaction at Neutral pH","authors":"Yeosol Yoon, Sehyun Yoo, Taeho Lim","doi":"10.1007/s12678-023-00837-8","DOIUrl":null,"url":null,"abstract":"<div><p>Among various chalcogenide materials, transition metal sulfides are known to be effective catalysts for the electrochemical hydrogen evolution reaction (HER). In particular, Ni-Co-S is a promising material for the next generation of non-precious metal HER catalysts due to its excellent HER activity in neutral pH solutions. Ni-Co-S is also advantageous in large-scale applications, as it enables relatively simple catalytic synthesis through electrodeposition. In this study, we employed a new S precursor, 2,5-dimercapto-1,3,4-thiadiazole (DMTD), for the electrodeposition of Ni-Co-S, instead of the conventional S precursor, thiourea (TU). Ni-Co-S synthesized with DMTD (Ni-Co-S<sub>DMTD</sub>) showed enhanced HER activity at neutral pH compared to that synthesized with TU (Ni-Co-S<sub>TU</sub>). It has been found that this improvement in activity is due to the large surface area and high S content of Ni-Co-S<sub>DMTD</sub>. The S content and HER activity of Ni-Co-S<sub>DMTD</sub> depend on the concentration of DMTD. At the optimal DMTD concentration (12 mM), Ni-Co-S<sub>DMTD</sub> exhibited an overpotential of 303 mV at a current density of 10 mA cm<sup>− 2</sup> and a Tafel slope of 99 mV dec<sup>− 1</sup> in a phosphate buffer solution (pH 7.4).</p><h3>Graphical Abstract</h3>\n <figure><div><div><div><picture><source><img></source></picture></div></div></div></figure>\n </div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":null,"pages":null},"PeriodicalIF":2.7000,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrocatalysis","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s12678-023-00837-8","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Among various chalcogenide materials, transition metal sulfides are known to be effective catalysts for the electrochemical hydrogen evolution reaction (HER). In particular, Ni-Co-S is a promising material for the next generation of non-precious metal HER catalysts due to its excellent HER activity in neutral pH solutions. Ni-Co-S is also advantageous in large-scale applications, as it enables relatively simple catalytic synthesis through electrodeposition. In this study, we employed a new S precursor, 2,5-dimercapto-1,3,4-thiadiazole (DMTD), for the electrodeposition of Ni-Co-S, instead of the conventional S precursor, thiourea (TU). Ni-Co-S synthesized with DMTD (Ni-Co-S_DMTD) showed enhanced HER activity at neutral pH compared to that synthesized with TU (Ni-Co-S_TU). It has been found that this improvement in activity is due to the large surface area and high S content of Ni-Co-S_DMTD. The S content and HER activity of Ni-Co-S_DMTD depend on the concentration of DMTD. At the optimal DMTD concentration (12 mM), Ni-Co-S_DMTD exhibited an overpotential of 303 mV at a current density of 10 mA cm^− 2 and a Tafel slope of 99 mV dec^− 1 in a phosphate buffer solution (pH 7.4).

Graphical Abstract

Abstract Image

查看原文本刊更多论文

以2,5-二巯基-1,3,4-噻二唑为S前驱体的Ni-Co-S电催化剂在中性pH下电沉积的析氢反应

在各种硫系材料中，过渡金属硫化物是电化学析氢反应(HER)的有效催化剂。特别是，Ni-Co-S在中性pH溶液中具有优异的HER活性，是下一代非贵金属HER催化剂的理想材料。Ni-Co-S在大规模应用中也具有优势，因为它可以通过电沉积实现相对简单的催化合成。在这项研究中，我们采用了一种新的S前驱体，2,5-二巯基-1,3,4-噻二唑(DMTD)来电沉积Ni-Co-S，取代了传统的S前驱体硫脲(TU)。与TU (Ni-Co-STU)合成的Ni-Co-S相比，DMTD合成的Ni-Co-S在中性pH下的HER活性增强。研究发现，这种活性的提高是由于Ni-Co-SDMTD的大表面积和高S含量。Ni-Co-SDMTD的S含量和HER活性与DMTD的浓度有关。在最佳DMTD浓度(12 mM)下，Ni-Co-SDMTD在10 mA cm−2电流密度下的过电位为303 mV，在pH 7.4的磷酸盐缓冲溶液中，Tafel斜率为99 mV dec−1。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY

CiteScore

4.80

自引率

6.50%

发文量

审稿时长

>12 weeks

期刊介绍： Electrocatalysis is cross-disciplinary in nature, and attracts the interest of chemists, physicists, biochemists, surface and materials scientists, and engineers. Electrocatalysis provides the unique international forum solely dedicated to the exchange of novel ideas in electrocatalysis for academic, government, and industrial researchers. Quick publication of new results, concepts, and inventions made involving Electrocatalysis stimulates scientific discoveries and breakthroughs, promotes the scientific and engineering concepts that are critical to the development of novel electrochemical technologies. Electrocatalysis publishes original submissions in the form of letters, research papers, review articles, book reviews, and educational papers. Letters are preliminary reports that communicate new and important findings. Regular research papers are complete reports of new results, and their analysis and discussion. Review articles critically and constructively examine development in areas of electrocatalysis that are of broad interest and importance. Educational papers discuss important concepts whose understanding is vital to advances in theoretical and experimental aspects of electrochemical reactions.