Preparation of Colloidal Pt/Ni Bimetallic Nanosols and Their Catalytic Activities for Hydrogen Generation from Hydrolysis Reaction of Sodium Borohydride

doi:10.7503/cjcu20130266

Abstract

Abstract:

The hydrolytic dehydrogenation of sodium borohydride is a promising integrated technology as a way of hydrogen storage and hydrogen production. This paper reports a facile route for synthesizing the PVP stabilized Pt/Ni bimetallic nanosol by a chemical co-reduction process. The morphology, size, structure and composition of the resultant Pt/Ni bimetallic nanosol were characterized by transmission electron microscopy(TEM) and ultraviolet-visible(UV-Vis) spectrum. The effects of PVP dosage, reducing agent dosage, and metal composition in the hydrolysis of NaBH₄ were studied. The results indicate that the prepared Pt/Ni bimetallic nanosol have an average size of about 2.0 nm. The catalytic activities of the Pt/Ni bimetallic nanosol are superior to monometallic Pt or monometallic Ni, among which especially the Pt₂₀Ni₈₀ bimetallic nanosol shows the highest catalytic activity with a hydrogen generation rate of 16640 mol_H₂·mol_Pt^-1·h^-1 at 303 K and an activation energy of 48 kJ/mol. In addition, the prepared Pt/Ni bimetallic nanosol has a good catalytic stability, and even keeps a higher catalytic activity after five runs test.

Key words: Pt/Ni bimetal, Nanosol, NaBH₄, Hydrogen generation, Catalytic activity

CLC Number:

O643

TrendMD:

KONG De-Cheng, GU Ya-Jun, XIANG Sheng, WANG Peng, CHENG Jun, ZHANG Hai-Jun, ZHANG Shao-Wei. Preparation of Colloidal Pt/Ni Bimetallic Nanosols and Their Catalytic Activities for Hydrogen Generation from Hydrolysis Reaction of Sodium Borohydride[J]. Chem. J. Chinese Universities, 2013, 34(10): 2377.

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