{"title":"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","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":"14 5","pages":"800 - 809"},"PeriodicalIF":2.7000,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"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\":\"14 5\",\"pages\":\"800 - 809\"},\"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}","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
摘要
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
Electrodeposition of Ni-Co-S Electrocatalyst Using 2,5-dimercapto-1,3,4-thiadiazole as S Precursor for Hydrogen Evolution Reaction at Neutral pH
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-SDMTD) showed enhanced HER activity at neutral pH compared to that synthesized with TU (Ni-Co-STU). It has been found that this improvement in activity is due to the large surface area and high S content of Ni-Co-SDMTD. The S content and HER activity of Ni-Co-SDMTD depend on the concentration of DMTD. At the optimal DMTD concentration (12 mM), Ni-Co-SDMTD 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).
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