Ruthenium anchored on carbon nanotube electrocatalyst for hydrogen production with enhanced Faradaic efficiency

被引：460

作者：

Kweon, Do Hyung ^{[1
]}

Okyay, Mahmut Sait ^{[2
]}

Kim, Seok-Jin ^{[1
]}

Jeon, Jong-Pil ^{[1
]}

Noh, Hyuk-Jun ^{[1
]}

Park, Noejung ^{[2
]}

Mahmood, Javeed ^{[1
]}

Baek, Jong-Beom ^{[1
]}

机构：

[1] Ulsan Natl Inst Sci & Technol UNIST, Ctr Dimens Controllable Organ Frameworks, Sch Energy & Chem Engn, 50 UNIST, Ulsan 44919, South Korea

[2] Ulsan Natl Inst Sci & Technol UNIST, Sch Nat Sci, 50 UNIST, Ulsan 44919, South Korea

来源：

NATURE COMMUNICATIONS | 2020年 / 11卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

TOTAL-ENERGY CALCULATIONS; ACTIVE EDGE SITES; ELECTROLYTIC HYDROGEN; EVOLUTION REACTION; CATALYSTS; PERFORMANCE; OXIDATION; KINETICS; OXYGEN; PH;

D O I：

10.1038/s41467-020-15069-3

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Developing efficient and stable electrocatalysts is crucial for the electrochemical production of pure and clean hydrogen. For practical applications, an economical and facile method of producing catalysts for the hydrogen evolution reaction (HER) is essential. Here, we report ruthenium (Ru) nanoparticles uniformly deposited on multi-walled carbon nanotubes (MWCNTs) as an efficient HER catalyst. The catalyst exhibits the small overpotentials of 13 and 17 mV at a current density of 10 mA cm(-2) in 0.5M aq. H2SO4 and 1.0M aq. KOH, respectively, surpassing the commercial Pt/C (16 mV and 33 mV). Moreover, the catalyst has excellent stability in both media, showing almost "zeroloss" during cycling. In a real device, the catalyst produces 15.4% more hydrogen per power consumed, and shows a higher Faradaic efficiency (92.28%) than the benchmark Pt/C (85.97%). Density functional theory calculations suggest that Ru-C bonding is the most plausible active site for the HER.

引用

页数：10

共 58 条

[31]

PARSONS R, 1951, T FARADAY SOC, V47, P914, DOI 10.1039/tf9514700914

[32] THE RATE OF ELECTROLYTIC HYDROGEN EVOLUTION AND THE HEAT OF ADSORPTION OF HYDROGEN [J].