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g‐C 3 N 4 /CeO 2 /Fe 3 O 4 Ternary Composite as an Efficient Bifunctional Catalyst for Overall Water Splitting
Author(s) -
Rashid Jamshaid,
Parveen Nadia,
Haq Tanveer ul,
Iqbal Aneela,
Talib Shamraiz Hussain,
Awan Saif Ullah,
Hussain Naveed,
Zaheer Muhammad
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201801597
Subject(s) - overpotential , water splitting , oxygen evolution , catalysis , ternary operation , bifunctional , materials science , electrocatalyst , composite number , inorganic chemistry , chemical engineering , chemistry , electrochemistry , composite material , electrode , biochemistry , photocatalysis , computer science , engineering , programming language
We report the very first example of a catalyst based on a ternary composite of graphitic carbonitride (g‐C 3 N 4 ), ceria (CeO 2 ) and magnetite (Fe 3 O 4 ) for overall water splitting in 1.0 M KOH. Synergy between the components due to electronic effects results in a highly efficient catalyst which catalyzes Oxygen Evolution Reaction (OER) and Hydrogen Evolution Reaction (HER) at substantially low overpotentials (400 mV and 310 mV respectively) to produce benchmark current density (10 mA cm −2 ). OER activity of the catalysts surpasses that of the benchmark RuO 2 catalyst at higher current densities (≥50 mA cm −2 ). The composite catalyst is stable and shows a Faraday efficiency of 98 % for OER. Overall water splitting was achieved at an overpotential of 1.94 V which is substantially high at 1 wt % loading of active metal.