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Bifunctional Hybrid Ni/Ni 2 P Nanoparticles Encapsulated by Graphitic Carbon Supported with N, S Modified 3D Carbon Framework for Highly Efficient Overall Water Splitting
Author(s) -
Sun Yiqiang,
Zhang Tao,
Li Xinyang,
Bai Yu,
Lyu Xianjun,
Liu Guangqiang,
Cai Weiping,
Li Yue
Publication year - 2018
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201800473
Subject(s) - bifunctional , overpotential , materials science , oxygen evolution , carbon fibers , chemical engineering , anode , water splitting , nanoparticle , cathode , nickel , hydrogen production , electrocatalyst , catalysis , inorganic chemistry , nanotechnology , electrode , metallurgy , electrochemistry , chemistry , composite material , composite number , organic chemistry , photocatalysis , engineering
The novel hybrid Ni/Ni 2 P nanoparticles with graphitic carbon coating supported by 3D N, S dual modified binder‐free macroporous carbon framework (Ni/Ni 2 P@3DNSC) are reported as an efficient bifunctional electrocatalysts for the production of hydrogen and oxygen. The obtained Ni/Ni 2 P@3DNSC electrode exhibits an excellent catalytic activity with a low overpotential of 231 mV for oxygen evolution reaction (OER) and 92 mV for hydrogen evolution reaction (HER) due to the strong coupled interface of Ni and Ni 2 P, synergistic effects between the hybrid Ni/Ni 2 P core and the graphitic carbon shell, the unique porous structure, and the heteroatoms doped effect. When both are used as cathode and anode, only a low cell voltage of 1.55 V is needed to achieve the current density of 10 mA cm −2 . This work demonstrates a new avenue for the development of bifunctional nonprecious electrocatalysts for the sustainable energy utilization.