title: Bionanofiber Assisted Decoration of Few-Layered MoSe2Nanosheets on 3D Conductive Networks for Efficient Hydrogen Evolution.
abstract: Molybdenum diselenide (MoSe2) has emerged as a promising electrocatalyst for hydrogen evolution reaction (HER). However, its properties are still confined due to the limited active sites and poor conductivity. Thus, it remains a great challenge to synergistically achieve structural and electronic modulations for MoSe2-based HER catalysts because of the contradictory relationship between these two characteristics. Herein, bacterial cellulose-derived carbon nanofibers are used to assist the uniform growth of few-layered MoSe2nanosheets, which effectively increase the active sites of MoSe2for hydrogen atom adsorption. Meanwhile, carbonized bacterial cellulose (CBC) nanofibers provide a 3D network for electrolyte penetration into the inner space and accelerate electron transfer as well, thus leading to the dramatically increased HER activity. In acidic media, the CBC/MoSe2hybrid catalyst exhibits fast hydrogen evolution kinetics with onset overpotential of 91 mV and Tafel slope of 55 mV dec-1, which is much more outstanding than both bulk MoSe2aggregates and CBC nanofibers. Furthermore, the fast HER kinetics are well supported by theoretical calculations of density-functional-theory analysis with a low activation barrier of 0.08 eV for H2generation. Hence, this work highlights an efficient solution to develop high-performance HER catalysts by incorporating biotemplate materials, to simultaneously achieve increased active sites and conductivity.
authors.affiliation: State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200433, P. R. China.|Hefei National Laboratory for Physical Science at Microscale, Collaborative Innovation Center of Chemistry for Energy Materials, University of Science and Technology of China, Hefei, 230026, P. R. China.
authors.forename: Feili
authors.initials: F
authors.lastname: Lai
authors.affiliation: Hefei National Laboratory for Physical Science at Microscale, Collaborative Innovation Center of Chemistry for Energy Materials, University of Science and Technology of China, Hefei, 230026, P. R. China.
authors.forename: Dingyu
authors.initials: D
authors.lastname: Yong
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China.
authors.forename: Xueliang
authors.initials: X
authors.lastname: Ning
authors.affiliation: Hefei National Laboratory for Physical Science at Microscale, Collaborative Innovation Center of Chemistry for Energy Materials, University of Science and Technology of China, Hefei, 230026, P. R. China.
authors.forename: Bicai
authors.initials: B
authors.lastname: Pan
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China.
authors.forename: Yue-E
authors.initials: YE
authors.lastname: Miao
authors.affiliation: State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200433, P. R. China.|State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China.
authors.forename: Tianxi
authors.initials: T
authors.lastname: Liu
mesh_terms: D001419:Bacteria / Q000737:chemistry; D002384:Catalysis; D002482:Cellulose / Q000737:chemistry; D004553:Electric Conductivity; D004583:Electrons; D006859:Hydrogen / Q000032:analysis*; D021621:Imaging, Three-Dimensional; D007477:Ions; D008982:Molybdenum / Q000737:chemistry*; D057139:Nanofibers / Q000737:chemistry* / Q000648:ultrastructure; D011789:Quantum Theory; D012643:Selenium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D007477:Ions; D006859:Hydrogen; D008982:Molybdenum; D002482:Cellulose; D012643:Selenium
keywords: MoSe2; bacterial cellulose; carbon nanofibers; hydrogen evolution reaction