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Porous Molybdenum‐Based Hybrid Catalysts for Highly Efficient Hydrogen Evolution
Author(s) -
Tang YuJia,
Gao MinRui,
Liu ChunHui,
Li ShunLi,
Jiang HaiLong,
Lan YaQian,
Han Min,
Yu ShuHong
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201505691
Subject(s) - tafel equation , polyoxometalate , carbonization , catalysis , graphene , materials science , oxide , molybdenum , exchange current density , inorganic chemistry , chemical engineering , metal , carbon fibers , metal organic framework , porosity , hydrogen , composite number , hybrid material , chemistry , nanotechnology , organic chemistry , electrode , electrochemistry , composite material , metallurgy , adsorption , scanning electron microscope , engineering
We have synthesized a porous Mo‐based composite obtained from a polyoxometalate‐based metal–organic framework and graphene oxide (POMOFs/GO) using a simple one‐pot method. The MoO 2 @PC‐RGO hybrid material derived from the POMOFs/GO composite is prepared at a relatively low carbonization temperature, which presents a superior activity for the hydrogen‐evolution reaction (HER) in acidic media owing to the synergistic effects among highly dispersive MoO 2 particles, phosphorus‐doped porous carbon, and RGO substrates. MoO 2 @PC‐RGO exhibits a very positive onset potential close to that of 20 % Pt/C, low Tafel slope of 41 mV dec −1 , high exchange current density of 4.8×10 −4 A cm −2 , and remarkable long‐term cycle stability. It is one of the best high‐performance catalysts among the reported nonprecious metal catalysts for HER to date.