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Multifunctional 0D–2D Ni 2 P Nanocrystals–Black Phosphorus Heterostructure
Author(s) -
Luo ZhongZhen,
Zhang Yu,
Zhang Chaohua,
Tan Hui Teng,
Li Zhong,
Abutaha Anas,
Wu XingLong,
Xiong Qihua,
Khor Khiam Aik,
Hippalgaonkar Kedar,
Xu Jianwei,
Hng Huey Hoon,
Yan Qingyu
Publication year - 2017
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201601285
Subject(s) - materials science , heterojunction , exfoliation joint , nanocrystal , black phosphorus , diffusion , electrical resistivity and conductivity , chemical engineering , conductivity , electrochemistry , hydrogen , analytical chemistry (journal) , electrode , nanotechnology , chemistry , optoelectronics , graphene , physics , engineering , organic chemistry , chromatography , electrical engineering , thermodynamics
0D transition metal phosphides (TMPs) nanocrystals (NCs)–2D ultrathin black phosphorus (BP) heterostructure (Ni 2 P@BP) have been synthesized via a facile sonication‐assisted exfoliation followed by a solvothermal process. Compared with the bare BP, the specially designed Ni 2 P@BP architecture can enhance the electrical conductivity (from 2.12 × 10 2 to 6.25 × 10 4 S m –1 ), tune the charge carrier concentration (from 1.25 × 10 17 to 1.37 × 10 20 cm –3 ), and reduce the thermal conductivity (from 44.5 to 7.69 W m –1 K –1 ) at 300 K, which can be considered for multiple applications. As a result, the Ni 2 P@BP exhibits excellent Li storage properties and high hydrogen evolution reaction electrocatalytic activities. The Ni 2 P@BP shows improved Li diffusion kinetics (e.g., the Li ions diffusion coefficient increases from 1.14 × 10 –14 cm 2 s –1 for pure BP nanosheets to 8.02 × 10 –13 cm 2 s –1 for Ni 2 P@BP). In addition, the Ni 2 P@BP electrode sustains hydrogen production with almost unchanged activity over 3000 cycles, which indicates its good chemical stability when operating under strong reducing environment.