title: Cotton Wool Derived Carbon Fiber Aerogel Supported Few-Layered MoSe2 Nanosheets As Efficient Electrocatalysts for Hydrogen Evolution.
abstract: Recent studies have proven that newly emerging two-dimensional molybdenum diselenide (MoSe2) is a promising noble-metal-free electrocatalyst for hydrogen evolution reaction (HER). Increasing the exposures of the active edges of MoSe2 nanostructures is a key issue to fully realize the excellent electrochemical properties of MoSe2. In this work, a few-layered MoSe2/carbon fiber aerogel (CFA) hybrids have been facilely obtained through the combination of high-temperature carbonization and one-pot solvothermal reaction. CFA derived from cotton wool is used as a three-dimensional conductive network for construction of hierarchical MoSe2/CFA hybrids, where few-layered MoSe2 nanosheets are uniformly and perpendicularly decorated on the surfaces of CFA. In the designed and prepared hybrids, CFA effectively increases the exposures of the active edges of MoSe2 nanosheets as well as provides reduced lengths for both electron transportation and ion diffusion. Therefore, the obtained optimal MoSe2/CFA hybrid exhibits excellent electrochemical activity as HER electrocatalyst with a small onset potential of -0.104 V vs reversible hydrogen electrode and a small Tafel slope of 62 mV per decade, showing its great potential as a next-generation Pt-free electrocatalyst for HER.
authors.affiliation: State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University , 220 Handan Road, Shanghai 200433, P. R. China.
authors.forename: Youfang
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University , 220 Handan Road, Shanghai 200433, P. R. China.
authors.forename: Lizeng
authors.initials: L
authors.lastname: Zuo
authors.affiliation: State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University , 220 Handan Road, Shanghai 200433, P. R. China.
authors.forename: Longsheng
authors.initials: L
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University , 220 Handan Road, Shanghai 200433, P. R. China.
authors.forename: Yunpeng
authors.initials: Y
authors.lastname: Huang
authors.affiliation: State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University , 220 Handan Road, Shanghai 200433, P. R. China.
authors.forename: Hengyi
authors.initials: H
authors.lastname: Lu
authors.affiliation: State Key Laboratory of Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University , 2999 North Renmin Road, Shanghai 201620, P. R. China.
authors.forename: Wei
authors.initials: W
authors.lastname: Fan
authors.affiliation: State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University , 220 Handan Road, Shanghai 200433, P. R. China.|State Key Laboratory of Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University , 2999 North Renmin Road, Shanghai 201620, P. R. China.
authors.forename: Tianxi
authors.initials: T
authors.lastname: Liu
keywords: MoSe2; carbon fiber aerogel; cotton wool; electrocatalyst; hydrogen evolution reaction