Premium
Nitrogen and Sulfur Co‐Doped Mesoporous Carbon Embedded with Co 9 S 8 Nanoparticles: Efficient Electrocatalysts for Hydrogen Evolution
Author(s) -
Yu Huan,
Tang Duihai,
Huang Yuan,
Zhang Wenting,
Sun Xue,
Yang Xunyu,
Qiao ZhenAn,
Wang Jianjun,
Zhao Zhen
Publication year - 2019
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201900303
Subject(s) - catalysis , overpotential , sulfur , calcination , mesoporous material , thiourea , nanoparticle , carbon fibers , heteroatom , cobalt , leaching (pedology) , inorganic chemistry , materials science , chemical engineering , chemistry , nanotechnology , organic chemistry , electrochemistry , electrode , ring (chemistry) , environmental science , composite material , composite number , soil science , engineering , soil water
Co 9 S 8 embedded, N,S co‐doepd mesoporous carbon materials were synthesized by adopting CoCl 2 as the molten salt. In details, CoCl 2 and glucose were used as cobalt and carbon precursors, respectively, and thiourea was utilized as sulfur and nitrogen precursors. This synthetic process involved three steps, including hand‐milling, carbonation, and acid leaching. The results of characterization exhibited that the final products had mesoporous structures, which also showed high nitrogen and sulfur contents. Moreover, the Co 9 S 8 nanoparticles dispersed evenly in the carbonaceous matrix. Furthermore, the calcining temperature could affect the porosities of the final products and the contents of the heteroatoms, which could further determine the electrocatalytic activities of these catalysts. When used as the electrocatalysts for hydrogen evolution reaction, the optimal catalyst, GTCo900, exhibited superior catalytic activities under acidic condition. The overpotential is 62 mV to afford a current density of 10 mA cm −2 . Moreover, it could also reveal excellent stability for 12 h.