Abstract
Dehydrogenation of NaAlH 4 can be greatly facilitated by activated carbon catalysts. The catalytic function can be further enhanced by decorating the carbon with Co, Ni, or Cu nanoparticles. The decomposition temperature was lowered by as much as 100 °C using a 3 wt.% Co or Ni-decorated activated carbon, comparable to a Ti-based catalyst, which were the most effective among the metals tested. The catalytic effect is likely due to a combination of hydrogen spillover effect, high contact area between carbon and the hydride, and confinement of the hydride as nano-sized domains in the pores of the carbon matrix. The catalysts were also effective in facilitating rehydrogenation of NaAlH 4 under moderate pressure (75.8 bar H 2) and low temperature (120 °C), when no rehydrogenation would occur without the catalyst. The fact that this new catalyst system is not specific to any hydride offers many potential applications.
| Original language | English |
|---|---|
| Pages (from-to) | 2737-2741 |
| Number of pages | 5 |
| Journal | International Journal of Hydrogen Energy |
| Volume | 37 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Feb 2012 |
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Keywords
- Carbon
- Catalyst
- Dehydrogenation
- Hydrogen storage
- Sodium aluminum hydride
- Spillover
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology
Cite this
Transition metal-decorated activated carbon catalysts for dehydrogenation of NaAlH 4 . / Lin, Sean S Y; Yang, Jun; Kung, Harold H.
In: International Journal of Hydrogen Energy, Vol. 37, No. 3, 02.2012, p. 2737-2741.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Transition metal-decorated activated carbon catalysts for dehydrogenation of NaAlH 4
AU - Lin, Sean S Y
AU - Yang, Jun
AU - Kung, Harold H
PY - 2012/2
Y1 - 2012/2
N2 - Dehydrogenation of NaAlH 4 can be greatly facilitated by activated carbon catalysts. The catalytic function can be further enhanced by decorating the carbon with Co, Ni, or Cu nanoparticles. The decomposition temperature was lowered by as much as 100 °C using a 3 wt.% Co or Ni-decorated activated carbon, comparable to a Ti-based catalyst, which were the most effective among the metals tested. The catalytic effect is likely due to a combination of hydrogen spillover effect, high contact area between carbon and the hydride, and confinement of the hydride as nano-sized domains in the pores of the carbon matrix. The catalysts were also effective in facilitating rehydrogenation of NaAlH 4 under moderate pressure (75.8 bar H 2) and low temperature (120 °C), when no rehydrogenation would occur without the catalyst. The fact that this new catalyst system is not specific to any hydride offers many potential applications.
AB - Dehydrogenation of NaAlH 4 can be greatly facilitated by activated carbon catalysts. The catalytic function can be further enhanced by decorating the carbon with Co, Ni, or Cu nanoparticles. The decomposition temperature was lowered by as much as 100 °C using a 3 wt.% Co or Ni-decorated activated carbon, comparable to a Ti-based catalyst, which were the most effective among the metals tested. The catalytic effect is likely due to a combination of hydrogen spillover effect, high contact area between carbon and the hydride, and confinement of the hydride as nano-sized domains in the pores of the carbon matrix. The catalysts were also effective in facilitating rehydrogenation of NaAlH 4 under moderate pressure (75.8 bar H 2) and low temperature (120 °C), when no rehydrogenation would occur without the catalyst. The fact that this new catalyst system is not specific to any hydride offers many potential applications.
KW - Carbon
KW - Catalyst
KW - Dehydrogenation
KW - Hydrogen storage
KW - Sodium aluminum hydride
KW - Spillover
UR - http://www.scopus.com/inward/record.url?scp=80054023731&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80054023731&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2011.03.154
DO - 10.1016/j.ijhydene.2011.03.154
M3 - Article
VL - 37
SP - 2737
EP - 2741
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 3
ER -