Mo掺杂对CuCo/BNNSs纳米复合材料催化氨硼烷水解活性的影响

doi:10.11896/cldb.19080151

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Abstract The Mo-doped amorphous CuCoMo/boron nitride nanosheets (donated as CuCoMo/BNNSs) nanocomposite catalyst was synthesized by co-reduction method, and BNNSs were obtained by polyvinylpyrrolidone (PVP) assisted sodium hydroxide crystallization. The structure and morphology of the nanocomposite catalyst were characterized by X-ray powder diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electronic microscopy (TEM), high resolution transmission electronic microscopy (HRTEM) and selected area electron diffraction (SAED). Due to Mo doping, the effect of CuCoMo/BNNSs’s catalytic activity for ammonia borane (AB) hydrolysis was investigated. The results showed that Mo acts as an electron donor when transferring electrons to CuCo NPs, which enhances the interaction among metals in the catalyst and improves the hydrolysis performance of AB. The activity test showed that the amorphous (CuCo)_0.85Mo_0.15/BNNSs nanocomposite catalyst had extremely high catalytic activity for hydrolysis of AB under room temperature when pH=14, and the turn over frequency (TOF) value was as high as 179.17 mol H₂·mol^-1 metal·min^-1. It is demonstrated for the first time that amorphous CuCoMo NPs are key active components in the catalytic hydrolysis of AB. This electron transfer is not limited to CuCoMo NPs, but can also be extended to CuCoW (156.77 mol H₂·mol^-1 metal·min^-1) and CuCoCr (125.42 mol H₂·mol^-1 metal·min^-1) NPs. Moreover, the catalytic mechanism of nanocomposite catalysts for AB hydrolysis was analyzed by combining the characte-rization results with experimental results.

Key words： boron nitride nanosheets polyvinylpyrrolidone (PVP) Mo doping nanocomposite catalyst ammonia borane hydrogen production

Published: 24 July 2020

CLC number:

O643

About author:: Jiaxin Zhai, a graduate student of Hebei University of Technology, majoring in applied chemistry and focusing on the research of two-dimensional materials and catalytic chemistry.
Guohua Ligraduated from the Materials Science Department of Tianjin University with a bachelor’s degree in polymer materials and received his Ph.D. degree in the Institute of Polymer Chemistry of Nankai University in 2004. He is currently an associate professor in Hebei University of Technology and participates in research on the preparation and application of supported nanocomposites.

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	ZHAI Jiaxin
	LI Guohua
	GAN Siping
	HU Enyan
	ZHANG Xiaorui

Cite this article:

ZHAI Jiaxin,LI Guohua,GAN Siping, et al. Effect of Mo Doping on the Catalytic Activity of CuCo/BNNSs Nanocomposites for Ammonia Boron Hydrolysis[J]. Materials Reports, 2020, 34(16): 16031-16036.

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http://www.mater-rep.com/EN/10.11896/cldb.19080151 OR http://www.mater-rep.com/EN/Y2020/V34/I16/16031

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