Bimetallic Fe-Mo sulfide/carbon nanocomposites derived from phosphomolybdic acid encapsulated MOF for efficient hydrogen generation  

作　　者：Zheng Huang Zhuxian Yang Mian Zahid Hussain Quanli Jia Yanqiu Zhu Yongde Xia 

机构地区：[1]College of Engineering,Mathematics and Physical Sciences,University of Exeter,Exeter EX44QF,UK [2]Hennan Key Laboratory of High Temperature Functional Ceramics,Zhengzhou University,Zhengzhou,450052,China

出　　处：《Journal of Materials Science & Technology》2021年第25期76-85,共10页材料科学技术（英文版）

基　　金：supported by the EPSRC Doctoral Training Partnership at University of Exeter,Leverhulme Trust(RPG-2018-320);EU RFCS(RFCS-2016-754077)。

摘　　要：To tackle the energy crisis and achieve more sustainable development,hydrogen as a clean and renewable energy resource has attracted great interest.Searching for cheap but efficient catalysts for hydrogen production from water splitting is urgently needed.In this report,bimetallic Fe-Mo sulfide/carbon nanocomposites that derived from a polyoxometalate phosphomolybdic acid encapsulated metal-organic framework MIL-100(PMA@MIL-100)have been generated and their applications in electrocatalytic hydrogen generation were explored.The PMA@MIL-100 precursor is formed via a simple one-pot hydrothermal synthesis method and the bimetallic Fe-Mo sulfide/carbon nanocomposites were obtained by chemical vapor sulfurization of PMA@MIL-100 at high temperatures.The nanocomposite samples were fully characterized by a series of techniques including X-ray diffraction,Fourier-transform infrared analysis,thermogravimetric analysis,N2 gas sorption,scanning electron microscopy,transmission electron microscopy,X-ray photoelectron spectroscopy,and were further investigated as electrocatalysts for hydrogen production from water splitting.The hydrogen production activity of the best performed bimetallic Fe-Mo sulfide/carbon nanocomposite exhibits an overpotential of-0.321 V at 10 m A cm^(-2)and a Tafel slope of 62 m V dec^(-1)with a 53%reduction in overpotential compared to Mo-free counterpart composite.This dramatic improvement in catalytic performance of the Fe-Mo sulfide/carbon composite is attributed to the homogeneous distribution of the nanosized iron sulfide,MoS_(2)particles,and the formation of Fe-Mo-S phases in the S-doped porous carbon matrix.This work has demonstrated a potential approach to fabricate complex heterogeneous catalytic materials for different applications.

关 键 词：MOF NANOCOMPOSITE ENCAPSULATION Metal sulfide Hydrogen generation 

分 类 号：TB33[一般工业技术—材料科学与工程]