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Preparation of supported NbC catalysts from peroxoniobic acid and in situ XAFS characterization

Paper ID Volume ID Publish Year Pages File Format Full-Text
43255 45960 2008 4 PDF Available
Title
Preparation of supported NbC catalysts from peroxoniobic acid and in situ XAFS characterization
Abstract

Nb/Al2O3 and Nb/SiO2 as niobium carbide precursors were prepared from peroxoniobic acid (PNA). Alumina-supported niobium carbide and silica-supported niobium carbide were prepared by temperature programmed reaction (TPR) method under CH4–H2 mixed gas passage. Both catalysts were characterized by X-ray absorption fine structure (XAFS) and Raman spectroscopy. Nb/Al2O3 was more efficiently carburized than Nb/SiO2. The carbon deposition onto NbC occurred after the carburization completion of the Nb species.

Graphical abstractNb/Al2O3 and Nb/SiO2 as niobium carbide precursors were prepared from peroxoniobic acid (PNA). Alumina-supported niobium carbide and silica-supported niobium carbide were prepared by temperature programmed reaction (TPR) method under CH4–H2 mixed gas passage. Both catalysts were characterized by X-ray absorption fine structure (XAFS) and Raman spectroscopy. Nb/Al2O3 was more efficiently carburized than Nb/SiO2. The carbon deposition onto NbC occurred after the carburization completion of the Nb species.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
NbC catalyst; XAFS; Carbon deposition
First Page Preview
Preparation of supported NbC catalysts from peroxoniobic acid and in situ XAFS characterization
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 343, Issues 1–2, 1 July 2008, Pages 25–28
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis