首页> 外文期刊>Advanced energy materials >High-Performance Hydrogen Evolution by Ru Single Atoms and Nitrided-Ru Nanoparticles Implanted on N-Doped Graphitic Sheet
【24h】

High-Performance Hydrogen Evolution by Ru Single Atoms and Nitrided-Ru Nanoparticles Implanted on N-Doped Graphitic Sheet

机译:Ru单个原子的高性能氢气进化和氮化-Cu纳米粒子注入在N掺杂的石墨片上

获取原文
获取原文并翻译 | 示例
           

摘要

The most efficient electrocatalyst for the hydrogen evolution reaction (HER) is a Pt-based catalyst, but its high cost and nonperfect efficiency hinder wide-ranging industrial/technological applications. Here, an electrocatalyst of both ruthenium (Ru) single atoms (SAs) and N-doped-graphitic(G(N))-shell-covered nitrided-Ru nanoparticles (NPs) (having a Ru-N-x shell) embedded on melamine-derived G(N) matrix {1: [Ru(SA)+Ru(NP)@RuNx@G(N)]/G(N)}, which exhibits superior HER activity in both acidic and basic media, is presented. In 0.5 m H2SO4/1 m KOH solutions, 1 shows diminutive "negative overpotentials" (-eta = |eta| = 10/7 mV at 10 mA cm(-2), lowest ever) and high exchange current densities (4.70/1.96 mA cm(-2)). The remarkable HER performance is attributed to the near-zero free energies for hydrogen adsorption/desorption on Ru(SAs) and the increased conductivity of melamine-derived G(N) sheets by the presence of nitrided-Ru(NPs). The nitridation process forming nitrided-Ru(NPs), which are imperfectly covered by a G(N) shell, allows superb long-term operation durability. The catalyst splits water into molecular oxygen and hydrogen at 1.50/1.40 V (in 0.1 m HClO4/1 m KOH), demonstrating its potential as a ready-to-use, highly effective energy device for industrial applications.
机译:用于氢气进化反应(她)的最有效的电催化剂是PT基催化剂,但其高成本和非富效效率妨碍宽范围的工业/技术应用。这里,钌(Ru)单原子(SAS)和N掺杂 - 石墨(G(n)) - 壳覆盖的氮化-Cu纳米颗粒(NPS)(具有Ru-NX壳)的电催化剂嵌入三聚氰胺上 - 衍生的g(n)矩阵{1:[Ru(sa)+ ru(np)@ runx @ g(n)] / g(n)}在酸性和基本介质中表现出优异的她的活性。在0.5μmH2SO4/ 1M KOH溶液中,图1显示了逐渐的“阴性过势”(-ETA = | = 10/7mV,在10 mA cm(-2),最低的最低)和高交换电流密度(4.70 / 1.96 MA CM(-2)))。显着的她的性能归因于Ru(SAS)上的氢吸收/解吸的近零能量,以及通过氮化-Ru(NPS)的存在的三聚氰胺衍生的G(n)片的导电性增加。形成氮化-Ru(NPS)的氮化过程,其不完全由G(n)壳覆盖,允许极好的长期操作耐久性。催化剂将水分解成分子氧和氢气,在1.50 / 1.40 V(在0.1M HClO4 / 1M KOH)中,证明其作为用于工业应用的即用的高效能量装置的潜力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号