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Phase‐Controlled Cobalt Phosphide Nanoparticles Coupled with N, P, S Co‐Doped Hollow Carbon Polyhedrons as Efficient Catalysts for Both Alkaline and Acidic Hydrogen Evolution
Author(s) -
Li Shuolin,
Li Hongmei,
Huang Shaowei,
He Qian,
Hou Linxi
Publication year - 2019
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201800757
Subject(s) - overpotential , tafel equation , cobalt , catalysis , materials science , phosphide , chemical engineering , heteroatom , electrochemistry , nanoparticle , electrocatalyst , nanotechnology , inorganic chemistry , electrode , chemistry , organic chemistry , metallurgy , ring (chemistry) , engineering
Tailoring cobalt phosphide electrocatalysts with a tunable phase and morphology is of great importance for the advancement of hydrogen evolution reaction (HER). The synthesis of phase‐ and morphology‐modulated hollow cobalt phosphide nanoparticles coupled with N, P, S co‐doped carbon (Co‐P@NPS‐C) polyhedrons through a facile three‐step method is reported. Benefiting from the cooperation of structural features, heteroatoms doping, and catalytic components (Co x P, a mixture of CoP and Co 2 P), the hollow Co x P@NPS‐C polyhedrons exhibit superior HER performance and long‐term stability in 1.0 m KOH solution, with a low onset potential value (18 mV), an overpotential of 80 mV at 10 mA cm −2 , and a small Tafel slope of 57.6 mV dec −1 . In addition, the Co x P@NPS‐C electrodes exhibit good electrochemical properties and stability in 0.5 m H 2 SO 4 solution. These results suggest a novel and promising coating approach with poly(cyclotriphosphazene‐ co ‐4,4′‐sulfonyldiphenol (PZS) to fabricate other heterogeneous catalysts for various applications.