气候变化领域集成服务门户(CCPortal): Facile synthesis of silk-cocoon S-rich cobalt polysulfide as an efficient catalyst for the hydrogen evolution reaction

CCPortal

DOI	10.1039/c8ee00948a
	Facile synthesis of silk-cocoon S-rich cobalt polysulfide as an efficient catalyst for the hydrogen evolution reaction
	Wang C.; Wang T.; Liu J.; Zhou Y.; Yu D.; Cheng J.-K.; Han F.; Li Q.; Chen J.; Huang Y.
发表日期	2018
ISSN	17545692
起始页码	2467
结束页码	2475
卷号	11 期号:9
英文摘要	Tuning the structure, morphology, and electronic state is of great significance to achieve highly efficient hydrogen evolution reaction (HER) electrocatalysts. In this work, we originally develop a silk-cocoon structured S-rich cobalt polysulfide (CoSx, x ≈ 3.9) catalyst with extremely high HER activity through a facile hydrothermal process. The formation mechanism of the silk-cocoon structured CoSx has been systematically studied and the key factors in the formation of this structure are discussed. Such a nanostructured catalyst has hollow spheres that are interwoven by numerous sub-10 nm nanofibers to form into a three-dimensional conductive network by connection of micrometer long nanofibers. The silk-cocoon structured CoSx shows excellent HER activity with an onset potential of 0 V vs. a reversible hydrogen electrode and a Tafel slope of 41 mV dec-1. The activity is much higher than that of the reported metal sulfide materials and is even comparable to commercial Pt/C. Moreover, the overpotential to yield a current density of 10 mA cm-2 is only 42 mV. We ascribe the high HER activity to the S-rich sites and the conductive silk-cocoon structure, which can benefit the charge transfer of the material. Thus, this work provides a guiding strategy for synthesis of nanostructured transition metal polysulfides with enhanced HER catalytic performance. © 2018 The Royal Society of Chemistry.
英文关键词	Catalyst activity; Charge transfer; Cobalt deposits; Electrocatalysts; Hydrogen; Nanocatalysts; Nanofibers; Polysulfides; Silk; Sulfur compounds; Transition metals; Catalytic performance; Conductive networks; Efficient catalysts; Formation mechanism; Hydrogen evolution reactions; Hydrothermal process; Nano-structured catalyst; Reversible hydrogen electrodes; Cobalt compounds; catalysis; catalyst; electrode; formation mechanism; hydrogen; hydrothermal system; nanoparticle; organic compound; performance assessment; polymer; transition element
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190121
作者单位	Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; School of Materials Science and Engineering, Tongji University, Shanghai, 200240, China; School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan Hubei, 430074, China; Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China; Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Department of Electrical Engineering and Computer Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Institute of Materials Science and Engineering, National Central University, Taoyuan, Taiwan
推荐引用方式 GB/T 7714	Wang C.,Wang T.,Liu J.,et al. Facile synthesis of silk-cocoon S-rich cobalt polysulfide as an efficient catalyst for the hydrogen evolution reaction[J],2018,11(9).
APA	Wang C..,Wang T..,Liu J..,Zhou Y..,Yu D..,...&Huang Y..(2018).Facile synthesis of silk-cocoon S-rich cobalt polysulfide as an efficient catalyst for the hydrogen evolution reaction.Energy & Environmental Science,11(9).
MLA	Wang C.,et al."Facile synthesis of silk-cocoon S-rich cobalt polysulfide as an efficient catalyst for the hydrogen evolution reaction".Energy & Environmental Science 11.9(2018).