期刊
JOURNAL OF POWER SOURCES
卷 196, 期 5, 页码 2785-2789出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2010.09.079
关键词
Co; Pt; Core-shell nanoparticles; Ammonia borane; Hydrolysis
资金
- MOST [2009AA03Z224, 2009AA05Z106]
- MOE [IRT-0927]
- Tianjin High-Tech [08JCZDJC21300]
Co core-Pt shell nanoparticles (denoted as Co1-x@Pt-x where x = 0.33, 0.43, 0.60, 0.68, 0.82) and carbon supported Co core-Pt shell nanoparticles (denoted as Co1-x@Pt-x/C where x = 0.60, 0.68, 0.82) (Co1-x@Pt-x/C = 43%), which are synthesized through a polyol reduction process with oleic acid as a surfactant, have been investigated as catalysts for hydrogen generation from hydrolysis of ammonia borane (NH3BH3) at 25 +/- 0.5 degrees C. The as-prepared Co core-Pt shell nanoparticles are uniformly dispersed on carbon surface with diameters of about 3 nm. It is found that the catalysts show favorable performance toward the hydrolysis of NH3BH3 and the catalytic activity is associated with the ratio of Pt to Co. Among the catalysts studied, Co-0.32@Pt-0.68/C (Co-0.32@Pt-0.68/C = 43%) displays the highest catalytic performance, delivering a high hydrogen-release rate of 4874 mL min(-1) g(-1) (per catalyst). (C) 2010 Elsevier B.V. All rights reserved.
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