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Two‐Dimensional NiIr@N‐Doped Carbon Nanocomposites Supported on Ni Foam for Electrocatalytic Overall Water Splitting
Author(s) -
Xu You,
Chai Xingjie,
Liu Mengying,
Ren Tianlun,
Yu Shanshan,
Wang Ziqiang,
Li Xiaonian,
Wang Liang,
Wang Hongjing
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202003473
Subject(s) - oxygen evolution , bifunctional , water splitting , electrocatalyst , materials science , chemical engineering , electrochemistry , annealing (glass) , nanocomposite , carbon fibers , nanotechnology , hydrogen production , catalysis , electrode , chemistry , composite number , metallurgy , composite material , organic chemistry , photocatalysis , engineering
Electrochemical water splitting can provide a promising avenue for sustainable hydrogen production. Highly efficient electrocatalysts toward the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are extremely important for the practical application of water splitting technology. Herein, a one‐step annealing strategy is reported for the fabrication of a metal–organic framework‐derived bifunctional self‐supported electrocatalyst, which is composed of two‐dimensional N‐doped carbon‐wrapped Ir‐doped Ni nanoparticle composites supported on Ni foam (NiIr@N‐C/NF). The resultant NiIr@N‐C/NF displays excellent electrocatalytic performance in 1.0 m KOH, with low overpotentials of 32 mV at 10 mA cm −2 for the HER and 329 mV at 50 mA cm −2 for the OER. Particularly, the HER‐OER bifunctional NiIr@N‐C/NF needs only 1.50 V to yield 10 mA cm −2 for overall water splitting.