High-Yield Hydrogen Production from Aqueous Phase Reforming over Single-Walled Carbon Nanotube Supported Catalysts
详细信息 查看全文
- 作者：Xiaoming Wang ; Nan Li ; Zhiteng Zhang ; Chuan Wang ; Lisa D. Pfefferle ; Gary L. Haller
- 刊名：ACS Catalysis
- 出版年：2012
- 出版时间：July 6, 2012
- 年：2012
- 卷：2
- 期：7
- 页码：1480-1486
- 全文大小：339K
- 年卷期：v.2,no.7(July 6, 2012)
- ISSN：2155-5435
文摘
Pt and Pt鈥揅o bimetallic catalysts supported on single-walled carbon nanotubes (SWNTs) were synthesized by a wet reduction鈥揹ecoration method and tested for catalytic activity of aqueous phase reforming of ethylene glycol. The Pt decorated on SWNT achieves a catalyst mass time hydrogen yield of 890 micromole gcat鈥? min鈥?, which is higher than the reported results for Pt鈥揳lumina catalyst. Experiments also show that this catalyst has better activity than Pt supported on activated carbon with a similar surface area, showing the advantage of SWNTs as a catalyst support. Factors affecting the aqueous phase reforming activity, such as temperature, pressure, WHSV, catalyst particle size, etc., were investigated. We have also explored Pt鈥揅o bimetallic catalysts by combining the structural characterization results with the reactivity results and revealed that bimetallic catalysts may promote the catalyst performance in two different ways: either via the formation of Pt鈥揅o alloy phase or via the synergistic catalytic activities of individual Pt and Co particles. The Pt鈥揅o鈥揝WNT catalyst achieved a hydrogen production activity as high as 4.6 mmol gcat鈥? min鈥?.