氨硼烷
双金属片
材料科学
双金属
催化作用
纳米颗粒
制氢
化学工程
水解
氢
微乳液
X射线光电子能谱
无机化学
金属
纳米技术
有机化学
复合材料
化学
冶金
肺表面活性物质
工程类
作者
Yuzhen Ge,Zameer Hussain Shah,Xi-Jie Lin,Rongwen Lu,Zhangming Liao,Shufen Zhang
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2016-12-23
卷期号:5 (2): 1675-1684
被引量:65
标识
DOI:10.1021/acssuschemeng.6b02430
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·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 molH2 molPt–1 min–1 was achieved at the hydrolysis temperature of 30 °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.
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