TY - JOUR
T1 - Phase-Controlled Synthesis of Nickel Phosphide Nanocrystals and Their Electrocatalytic Performance for the Hydrogen Evolution Reaction
AU - Li, Huiming
AU - Lu, Siqi
AU - Sun, Jingyao
AU - Pei, Jiajing
AU - Liu, Di
AU - Xue, Yanrong
AU - Mao, Junjie
AU - Zhu, Wei
AU - Zhuang, Zhongbin
N1 - Funding Information:
This work was financially supported by the National Key Research and Development Program of China (No. 2017YFA0206500), the National Natural Science Foundation of China (No. 21671014), the Beijing Natural Science Foundation (No. 2174081), and the Fundamental Research Funds for the Central Universities (No. buctrc201522).
Publisher Copyright:
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/8/9
Y1 - 2018/8/9
N2 - The phase of nanocrystals has a key role in the modulation of catalytic properties. Uniform and well-crystallized nickel phosphide nanocrystals with controlled phases (Ni5P4, Ni2P, and Ni12P5) and narrow size distributions are synthesized by a wet chemical method. The phases of the as-synthesized nickel phosphide nanocrystals are controlled by the P/Ni precursor molar ratio, heating process, and time of reaction. Rarely reported nearly monodisperse 5.6 nm Ni5P4 nanocrystals are successfully synthesized and show superior hydrogen evolution reaction (HER) activity. Only a low overpotential of 103 mV is required to achieve the HER current of 10 mA cm−2 at a low catalyst loading of 0.12 mg cm−2. The high HER activity is attributed to the high quality of the as-obtained Ni5P4 nanocrystals, which have the electronic effect from the Ni5P4 phase and also high surface area owing to the small particle size. A systematic study of the controlled synthesis of nickel phosphide nanocrystals is shown in this paper, and the HER catalytic activity is improved through the phase- and size-controlled synthesis of nanocrystals.
AB - The phase of nanocrystals has a key role in the modulation of catalytic properties. Uniform and well-crystallized nickel phosphide nanocrystals with controlled phases (Ni5P4, Ni2P, and Ni12P5) and narrow size distributions are synthesized by a wet chemical method. The phases of the as-synthesized nickel phosphide nanocrystals are controlled by the P/Ni precursor molar ratio, heating process, and time of reaction. Rarely reported nearly monodisperse 5.6 nm Ni5P4 nanocrystals are successfully synthesized and show superior hydrogen evolution reaction (HER) activity. Only a low overpotential of 103 mV is required to achieve the HER current of 10 mA cm−2 at a low catalyst loading of 0.12 mg cm−2. The high HER activity is attributed to the high quality of the as-obtained Ni5P4 nanocrystals, which have the electronic effect from the Ni5P4 phase and also high surface area owing to the small particle size. A systematic study of the controlled synthesis of nickel phosphide nanocrystals is shown in this paper, and the HER catalytic activity is improved through the phase- and size-controlled synthesis of nanocrystals.
KW - electrochemistry
KW - heterogeneous catalysis
KW - hydrogen evolution reaction
KW - nickel phosphides nanoparticles
KW - phase control
UR - http://www.scopus.com/inward/record.url?scp=85050590967&partnerID=8YFLogxK
U2 - 10.1002/chem.201801964
DO - 10.1002/chem.201801964
M3 - Article
C2 - 29870074
AN - SCOPUS:85050590967
SN - 0947-6539
VL - 24
SP - 11748
EP - 11754
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
IS - 45
ER -