Synthesis and characterization of Fe-Ni/ɣ-Al2O3 egg-shell catalyst for H2 generation by ammonia decomposition
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- 作者：Hugo Silvaa ; Morten G. Nielsena ; Elisabetta M. Fiordalisob ; Christian D. Damsgaardb ; Carsten Gundlacha ; Takeshi Kasamab ; I.b. Chorkendorffa ; Debasish Chakrabortya ; debc@fysik.dtu.dk" class="auth_mail" title="E-mail the corresponding author
- 关键词：Ammonia decomposition ; Hydrogen ; Egg-shell catalyst ; Glycerol ; Viscosity ; Incipient wetness impregnation ; ɣ-Al2O3 spheres
- 刊名：Applied Catalysis A: General
- 出版年：2015
- 出版时间：25 September 2015
- 年：2015
- 卷：505
- 期：Complete
- 页码：548-556
- 全文大小：2772 K
文摘
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A novel synthesis route of Fe–Ni/ɣ-Al2O3 egg-shell catalyst is described.
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Glycerol viscosity is a key property to prevent FeNi active phase migration toward the inner-core of ɣ-Al2O3.
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X-ray micro tomography was used to inspect the FeNi distribution throughout the entire volume of the egg-shell catalyst.
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Fe–Ni alloy nanoparticles with a size of approximately 5 nm were measured in the outer-shell using TEM and STEM.
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The egg-shell activity for ammonia decomposition was superior to both uniform profile and egg-white catalyst.