过电位
钌
电催化剂
催化作用
结晶度
化学工程
退火(玻璃)
纳米晶
纳米颗粒
化学
热稳定性
纳米技术
材料科学
无机化学
物理化学
电化学
有机化学
冶金
复合材料
电极
工程类
作者
Yutong Li,Lei A. Zhang,Yong Qin,Fuqiang Chu,Yong Kong,Yongxin Tao,Yongxin Li,Yunfei Bu,Dong Ding,Meilin Liu
标识
DOI:10.1021/acscatal.8b01609
摘要
The development of highly active and durable inexpensive electrocatalysts for hydrogen evolution reaction (HER) is still a formidable challenge. Herein, an ordered hexagonal-closed-packed (hcp)-Ru nanocrystal coated with a thin layer of N-doped carbon (hcp-Ru@NC) was fabricated through the thermal annealing of polydopamine (PDA)-coated Ru nanoparticle (RuNP@PDA). As an alternative to Pt/C catalyst, the hcp-Ru@NC nanocatalyst exhibited the small overpotential of 27.5 mV at a current density of 10 mA cm–2, as well as long-term stability for HER in acid media. Interestingly, the HER performance of hcp-Ru is highly dependent on its crystallinity. The calculation from density functional theory (DFT) revealed that the difference in HER activity over various exposed surface causes the crystallinity-dependent property of hcp-Ru. The results provided clues to guide the design of Ru-based inexpensive HER electrocatalyst.
科研通智能强力驱动
Strongly Powered by AbleSci AI