Controlling Co-support interaction in Co/MWCNTs catalysts and catalytic performance for hydrogen production via NH3 decomposition

Authors:  Hui Zhang, Yahia A. Alhamed, Wei Chu, Zhongbin Ye, Abdulrahim AlZahrani, Lachezar Petrov

Abstract:
The influence ofthermaltreatmentin hydrogen and nitrogen atmosphere of Co precursors in Co/MWCNTs system on the catalyst structure and catalytic activities in NH₃ decomposition were studied. The cobaltsupport interaction in cobalt supported on MWCNTs was controlled by varying the temperature of thermal treatment of Co precursor and reaction media. Due to the interaction of cobalt species with multi wall carbon nanotubes (MWCNTs), the Co/MWCNTs catalysts after pretreatment in nitrogen exhibited higher catalytic activity for NH₃ decomposition comparing to that observed after hydrogen pretreatment of the sample. Cobalt dispersion in MWCNTs-supported catalysts was found to be a function of thermal pretreatmenttemperatures. The studiedsamples were characterizedbyX-raydiffraction,HRTEM,thermo gravimetric analysis, temperature programmed reduction and temperature programmed desorption.

Keywords:
MWCNTs-supported cobalt catalyst
Cobalt-support interaction
NH₃ decomposition
Hydrogen

Published in: Applied catalysis A: General  (Volumes 464–465, Pages 1-384, 15 August 2013)

Publisher: Elsevier  

ISSN Information: 0926-860X

Controlling Co-support interaction in Co/MWCNTs catalysts and catalytic performance for hydrogen production via NH3 decomposition

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