标题:Co9S8-Catalyzed Growth of Thin-Walled Graphite Microtubes for Robust, Efficient Overall Water Splitting
作者:Guo, Mingrui; Liu, Yi; Dong, Shun; Jiao, Xiuling; Wang, Ting; Chen, Dairong
作者机构:[Guo, Mingrui; Liu, Yi; Dong, Shun; Jiao, Xiuling; Wang, Ting; Chen, Dairong] Shandong Univ, Sch Chem & Chem Engn, Natl Engn Res Ctr Colloidal Mat, Ji 更多
通讯作者:Wang, Ting;Wang, T;Chen, DR
通讯作者地址:[Wang, T; Chen, DR]Shandong Univ, Sch Chem & Chem Engn, Natl Engn Res Ctr Colloidal Mat, Jinan 250100, Shandong, Peoples R China.
来源:CHEMSUSCHEM
出版年:2018
卷:11
期:23
页码:4150-4155
DOI:10.1002/cssc.201802055
关键词:cobalt sulfide; co-doping; ferromagnetic; carbon nanotubes; water; splitting
摘要:Co9S8 crystals can catalyze the growth of thin-walled graphite microtubes (GMTs) through a catalytic chemical vapor deposition (CCVD) process using thiourea as the precursor. The growth of GMTs follows a tip-growth mechanism with tube diameters up to a few micrometer. The hollow interiors of the GMTs are filled with carbon nanotubes and wrinkled graphene layers, which form a unique nanotube/graphene-in-microtube structure. As-formed GMTs are N,S-codoped with lots of Co9S8 nanoparticles encapsulated in their inner walls. These GMTs are room-temperature ferromagnets and can be loaded on Ni foams to work as binder-free electrocatalysts with low overpotential (310 mV at 50 mA cm(-2) for the oxygen evolution reaction (OER) and 284 mV at 50 mA cm(-2) for the hydrogen evolution reaction (HER)) and long-term durability (continuous work for 120 h without loss in performance). Our research proves that metal sulfides can catalyze the growth of graphite microtubes and as-formed GMTs may potentially be used as functional building blocks to construct new kinds of electrochemical devices for various energy-related applications.
收录类别:EI;SCOPUS;SCIE
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85056480045&doi=10.1002%2fcssc.201802055&partnerID=40&md5=48ec35a87ad3d0fed1de555c4813deed
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