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Polyoxometalate and Resin‐Derived P‐Doped Mo 2 C@N‐Doped Carbon as a Highly Efficient Hydrogen‐Evolution Reaction Catalyst at All pH Values
Author(s) -
Yan Gang,
Feng Xiaojia,
Khan Shifa Ullah,
Xiao Liguang,
Xi Wenguang,
Tan Huaqiao,
Ma Yuanyuan,
Zhang Lunan,
Li Yangguang
Publication year - 2018
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201701400
Subject(s) - carbonization , catalysis , carbon fibers , calcination , polyoxometalate , materials science , hydrogen , molybdenum , doping , nuclear chemistry , chemical engineering , inorganic chemistry , chemistry , organic chemistry , composite number , composite material , optoelectronics , engineering , scanning electron microscope
A new type of P‐doped Mo 2 C coated by N‐doped carbon (P‐Mo 2 C@NC) has been successfully prepared by calcining a mixture of H 3 [PMo 12 O 40 ] polyoxometalates (POMs) and urea‐formaldehyde resin under an N 2 atmosphere. Urea‐formaldehyde resin not only serves as the carbon source to ensure carbonization but also facilitates the uniform distribution of POM precursors, which efficiently avoid the aggregation of Mo 2 C particles at high temperatures. TEM analysis revealed that the average diameter of the Mo 2 C particles was about 10 nm, which is coated by a few‐layer N‐doped carbon sheet. The as‐prepared P‐Mo 2 C@NC displayed excellent hydrogen‐evolution reaction (HER) performance and long‐term stability in all pH environments. To reach a current density of 10 mA cm −2 , only 109, 159, and 83 mV were needed for P‐Mo 2 C@NC in 0.5 m H 2 SO 4 (pH 0), 0.1 m phosphate buffer (pH 7), and 1 m KOH (pH 14), respectively. This could provide a high‐yield and low‐cost method to prepare uniform nanosized molybdenum carbides with highly efficient and stable HER performance.