Crystallinity Dependence of Ruthenium Nanocatalyst toward Hydrogen Evolution Reaction

被引：194

作者：

Li, Yutong ^{[1
]}

Zhang, Lei A. ^{[2
]}

Qin, Yong ^{[1
]}

Chu, Fuqiang ^{[1
]}

Kong, Yong ^{[1
]}

Tao, Yongxin ^{[1
]}

Li, Yongxin ^{[1
]}

Bu, Yunfei ^{[3
]}

Ding, Dong ^{[2
]}

Liu, Meilin ^{[2
]}

机构：

[1] Changzhou Univ, Sch Petrochem Engn, Jiangsu Key Lab Adv Mat & Technol, Changzhou 213164, Jiangsu, Peoples R China

[2] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

[3] Nanjing Univ Informat & Technol, Sch Environm Sci & Engn, Nanjing 210044, Jiangsu, Peoples R China

来源：

ACS CATALYSIS | 2018年 / 8卷 / 07期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

Ruthenium nanocatalyst; crystallinity-dependence; hydrogen evolution reaction; N-doped graphene; electrocatalyst; SUSTAINABLE ENERGY SYSTEM; EFFICIENT ELECTROCATALYST; OXYGEN EVOLUTION; CARBON NANOTUBES; DOPED GRAPHENE; NANOPARTICLES; NITROGEN; OXIDATION; NANOSTRUCTURES; CONVERSION;

D O I：

10.1021/acscatal.8b01609

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

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 over potential 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.

引用

页码：5714 / 5720

页数：13

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