• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced functional materials >Triple Interface Optimization of Ru-based Electrocatalyst with Enhanced Activity and Stability for Hydrogen Evolution Reaction
【24h】

Triple Interface Optimization of Ru-based Electrocatalyst with Enhanced Activity and Stability for Hydrogen Evolution Reaction

机译：Triple Interface Optimization of Ru-based Electrocatalyst with Enhanced Activity and Stability for Hydrogen Evolution Reaction

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

A challenging task is to promote Ru atom economy and simultaneously alleviateRu dissolution during the hydrogen evolution reaction (HER) process.Herein, Ru nanograins (≈1.7 nm in size) uniformly grown on 1T-MoS2 lace-decoratedTi_3C_2T_x MXene sheets (Ru@1T-MoS_2-MXene) are successfully synthesizedwith three types of interfaces (Ru/MoS_2, Ru/MXene, and MoS_2/MXene).It gives high mass activity of 0.79 mA μg_(Ru)~(?1) at an overpotential of 100 mV,which is ≈36 times that of Ru NPs. It also has a much smaller Ru dissolutionrate (9 ng h~(?1)), accounting for 22% of the rate for Ru NPs. Electrochemicaltests, scanning electrochemical microscopy measurements combined withDFT calculations disclose the role of triple interface optimization in improvedactivity and stability. First, 2D MoS_2 and MXene can well disperse and stabilizeRu grains, giving larger electrochemical active area. Then, Ru/MoS_2 interfacesweakening H* adsorption energy and Ru/MXene interfaces enhancingelectrical conductivity, can efficiently improve the activity. Next, MoS_2/MXeneinterfaces can protect MXene sheet edges from oxidation and keep 1T-MoS_2phase stability during the long-term catalytic process. Meanwhile, Ru@1TMoS_2-Mxene also displays superior activity and stability in neutral and alkalinemedia. This work provides a multiple-interface optimization route to develophigh-efficiency and durable pH-universal Ru-based HER electrocatalysts.

著录项

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