Revisiting Carbon Based Metallic Compounds – Nanoscale Surface Science and Environmental Catalysis

Abstract:

Catalytic ability on 12 kinds of carbide powders was investigated at room temperature using NOx gas degradation. They are largely classified into two groups, depending on whether the reaction involves a nitrogen gas in air or not. The carbon dangling bonds largely contribute to the reaction, while the accompanied metal atoms play an important role for adsorbing/dissociating nitrogen gas. Mechanical milling or annealing, as long as without agglomeration, is an effective method for activating powder catalysis, producing new surfaces with plenty catalytic sites. A new concept of catalysis is presented, based on the Schottky barrier-like model, where the charge imbalance is produced at the interface between the non-uniform thin oxide and the carbide.

• Periodical: Materials Science Forum (Volumes 638-642)
• Pages: 858-863
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.638-642.858
• Online since: January 2010
• Authors: Hideyuki Okumura, K. Arai, Y. Nishiyama, Eiji Yamasue, Keiichi N. Ishihara
• Keywords: Carbide, Catalysis, NOx Decomposition, Schottky Barrier, Surface Science

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