Tungsten Nitride-Cobalt Anchored in N-Doped Ordered Porous Carbon as an Efficient Oxygen Reduction Reaction Electrocatalyst.
We prepared a non-precious-metal tungsten nitride-cobalt (WN-Co) electrocatalyst anchored in nitrogen-doped ordered porous carbon (NOPC) through an in situ method. The WN-Co/NOPC electrocatalyst possesses good oxygen reduction reaction (ORR) capability in alkaline media, including a high onset potential of -132 mV, a dominant four-electron process, and a superior stability (onset potential and limiting current density were almost unchanged after 5000 cycles in 0.1 m KOH). The improved ORR performance was comparable to that of WN/NOPC and Co/NOPC with regard to three aspects: the even dispersion and uniform size of electrocatalyst particles provide more reactive sites; the nitrogen doping, high specific surface area and highly ordered mesoporous channel of catalyst support (NOPC) are conducive to the infiltration of the electrolyte; the existence of WN reinvests the catalyst with good stability, and the anchored configuration of WN and Co in the NOPC will prevent the particles from agglomerating after a long-term cycle, thereby improving the stability of the catalyst particles.
College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, P.R. China), Fax.
Yan
Y
Zhou
College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, P.R. China), Fax.
Hairong
H
Xue
College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, P.R. China), Fax.
Tao
T
Wang
College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, P.R. China), Fax.
Hu
H
Guo
College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, P.R. China), Fax.
Xiaoli
X
Fan
College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, P.R. China), Fax.
Li
L
Song
College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, P.R. China), Fax.
Wei
W
Xia
College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, P.R. China), Fax.
Hao
H
Gong
College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, P.R. China), Fax.
Yuping
Y
He
College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, P.R. China), Fax.
Junwei
J
Wang
College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, P.R. China), Fax.
Jianping
J
He
cobalt; electrochemistry; nanoporous carbon; non-precious metal; tungsten