Issue 45, 2008
From the journal:

Dalton Transactions

Synthesis of mesoporous tungsten carbide by an impregnation–compaction route, and its NH3decomposition catalytic activity

Xiangzhi Cui,a   Hua Li,b   Limin Guo,a   Dannong He,c   Hangrong Chena  and  Jianlin Shi*a  

* Corresponding authors

a State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, China
E-mail: jlshi@sunm.shcnc.ac.cn
Fax: +86-21-52413122
Tel: +86-21-52412714

b Suzhou University, 50 Donghuan Road, Suzhou, China

c National Engineering Research Center for Nanotechnology, 28 Jiangchuan Road, Shanghai, China

Abstract

A mesoporous tungsten carbide (WC) with high surface area (138 m2 g−1) has been synthesized at 700 °C using a modified template replicating route in which the pore entrances were sealed under external pressure after the W source impregnation. X-Ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray (EDX) spectroscopy and nitrogen sorption techniques were employed to characterize the replicated material. The prepared tungsten carbide with high surface area is well crystallized and has a partially ordered mesoporous structure. Temperature programmed reaction (TPR) and time-on-stream (TOS) results show that the prepared mesoporous tungsten carbide has high and stable catalytic activity for the decomposition reaction of NH3, and the complete NH3decomposition temperature was obtained at 500 °C. This mesoporous WC appears to be a good catalyst for use for NH3decomposition.

Graphical abstract: Synthesis of mesoporous tungsten carbide by an impregnation–compaction route, and its NH3decomposition catalytic activity

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Article information

DOI
https://doi.org/10.1039/B809923E
Article type
Paper
Submitted
11 Jun 2008
Accepted
28 Jul 2008
First published
08 Oct 2008

Dalton Trans., 2008, 6435-6440

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Synthesis of mesoporous tungsten carbide by an impregnation–compaction route, and its NH3decomposition catalytic activity

X. Cui, H. Li, L. Guo, D. He, H. Chen and J. Shi, Dalton Trans., 2008, 6435 DOI: 10.1039/B809923E

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