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论文类型：期刊论文

发表时间：2017-02-01

发表刊物：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录刊物：SCIE、EI

卷号：5

期号：2

页面范围：1675-1684

ISSN号：2168-0485

关键字：Hydrogen production; Ammonia-borane; Hydrolysis; Pt decorating; CoCu bimetal; Reverse microemulsion

摘要：Pt decorated CoCu bimetallic nanoparticles (NPs) coated by silica (Pt-CoCu@SiO2) were synthesized for efficient catalytic hydrogen production from hydrolysis of ammonia-borane (NH3 center dot BH3; AB). Initially, silica-coated CoCu bimetallic NPs (CoCu@SiO2) were prepared by a modified co-reduction method from reverse microemulsion. Further, Pt-CoCu@SiO2 was obtained by a facile spontaneous displacement reaction by using CoCu@SiO2 and H2PtCl6 as the starting materials. The catalytic activity of Pt on bimetallic support was compared to that of monometallic supports, i.e., Co and Cu. The results of catalytic experiments showed that the support of CoCu bimetal can significantly enhance the activity of Pt as compared to that of pure Cu or Co. An impressive turnover frequency (TOF) value of 272.8 mol(H2) mol(Pt)(-1) min(-1) was achieved at the hydrolysis temperature of 30 degrees C for Pt-CoCu@SiO2. The detailed formation process of catalysts was described, and the samples were characterized by TEM, STEM, XPS, EDS element mapping, etc.