1 research outputs found
Highly Efficient Pt Decorated CoCu Bimetallic Nanoparticles Protected in Silica for Hydrogen Production from Ammonia–Borane
Pt decorated CoCu
bimetallic nanoparticles (NPs) coated by silica
(Pt-CoCu@SiO<sub>2</sub>) were synthesized for efficient catalytic
hydrogen production from hydrolysis of ammonia–borane (NH<sub>3</sub>·BH<sub>3</sub>; AB). Initially, silica-coated CoCu bimetallic
NPs (CoCu@SiO<sub>2</sub>) were prepared by a modified co-reduction
method from reverse microemulsion. Further, Pt-CoCu@SiO<sub>2</sub> was obtained by a facile spontaneous displacement reaction by using
CoCu@SiO<sub>2</sub> and H<sub>2</sub>PtCl<sub>6</sub> 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<sub>H2</sub> mol<sub>Pt</sub><sup>–1</sup> min<sup>–1</sup> was achieved at the hydrolysis temperature of 30 °C for Pt-CoCu@SiO<sub>2</sub>. The detailed formation process of catalysts was described,
and the samples were characterized by TEM, STEM, XPS, EDS element
mapping, etc