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Homologous Catalysts Based on Fe‐Doped CoP Nanoarrays for High‐Performance Full Water Splitting under Benign Conditions
Author(s) -
Ma Min,
Zhu Guilei,
Xie Fengyu,
Qu Fengli,
Liu Zhiang,
Du Gu,
Asiri Abdullah M.,
Yao Yadong,
Sun Xuping
Publication year - 2017
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201700693
Subject(s) - overpotential , water splitting , oxygen evolution , electrocatalyst , cobalt , catalysis , materials science , electrochemistry , bimetallic strip , anode , chemical engineering , inorganic chemistry , phosphide , electrolysis of water , chemistry , electrolysis , electrode , electrolyte , photocatalysis , biochemistry , engineering
The design and development of earth‐abundant electrocatalysts for efficient full water splitting under mild conditions are highly desired, yet remain a challenging task. A homologous Fe‐doped Co‐based nanoarray incorporating complementary catalysts is shown to effect high‐performance and durable water splitting in near‐neutral media. Iron‐doped cobalt phosphate borate nanoarray on carbon cloth (Fe‐Co‐Pi‐Bi/CC) derived from iron‐doped cobalt phosphide on CC (Fe‐CoP/CC) through oxidative polarization behaves as a highly active bimetallic electrocatalyst for water oxidation with an overpotential of 382 mV to afford a catalytic current density of 10 mA cm −2 in 0.1 m potassium borate (K‐Bi, pH 9.2). Fe‐CoP/CC is also highly active for the hydrogen evolution reaction, capable of driving 10 mA cm −2 at an overpotential of only 175 mV in 0.1 m K‐Bi. A two‐electrode water electrolyzer incorporating Fe‐Co‐Pi‐Bi/CC as anode and Fe‐CoP/CC as cathode achieves 10 mA cm −2 water‐splitting current at a cell voltage of 1.95 V with strong long‐term electrochemical durability.