Bimetallic Fe-Mo sulfide/carbon nanocomposites derived from phosphomolybdic acid encapsulated in MOF for efficient hydrogen generation
Huang, Z; Yang, Z; Hussain, MZ; et al.Jia, Q; Zhu, Y; Xia, Y
Date: 1 February 2021
Journal
Journal of Materials Science and Technology
Publisher
Elsevier / Chinese Society for Metals
Publisher DOI
Abstract
To tackle the energy crisis and achieve a 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 ...
To tackle the energy crisis and achieve a 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 in 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 vapour sulfurization of PMA@MIL-100 at high temperatures. The nanocomposite
samples were fully characterized by a series of techniques including XRD, FT-IR, TGA, N2
gas sorption, SEM, TEM, XPS, 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
mA cm-2
and a Tafel slope of 62 mV dec-1 with a 53% reduction in overpotential compared to
Mo-free counterpart composite. This dramatic improvement in catalytic performance of the FeMo sulfide/carbon composite is attributed to the homogeneous distribution of the nanosized
iron sulfide, MoS2 particles and the formation 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.
Engineering
Faculty of Environment, Science and Economy
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