期刊
JOURNAL OF CATALYSIS
卷 260, 期 1, 页码 198-201出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2008.09.013
关键词
Hydrogen spillover; Bridge for spillover; Benson-Boudart method; Metal dispersion; Hydrogen storage
资金
- U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy within the Hydrogen Sorption Center of Excellence (HSCoE)
- National Science Foundation
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [0753008] Funding Source: National Science Foundation
A new bridge-building technique was used for facilitating H spillover on metal doped adsorbents for hydrogen storage at room temperature. By preadsorbing 1.0 x 10(-3) atm of CH4 on Pt/AX-21 (superactivated carbon), the adsorbed amount of hydrogen increased by. similar to 100% at 1 atm and 25 degrees C, attributed to the adsorbed CH4 serving as bridges for spillover. We conclude that the Benson-Boudart method can provide a good assessment for the dispersion of metals supported on Al2O3 (and zeolites). For carbon and SiO2 supports, even with pure H-2, spillover leads to overestimates of dispersion, and any small amounts of gaseous impurities could lead to much greater overestimates. (C) 2008 Elsevier Inc. All rights reserved.
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