Electronic structure of tungsten carbide and its catalytic behavior

✍ Scribed by Richard J. Colton; Jan-Tsyu J. Huang; J. Wayne Rabalais

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 289 KB
• Volume: 34
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(75)85287-0

✦ Synopsis

The different obsewations concerning the platinum-like eltxtronic structure found in X-ray photoelectron spectra as contrasted by the platinum-unlike density of stztes detected by soft X-ray appearance potential spectroscopy is reconciled. The platinum-like catalytic activity of WC results from changes in the election distribution when C is added to W; core level chemical shifts indicate electron transfer from W valence orbit& to Czp orbit&. Transition metal carbides have recently been shown [1,2] to be effective catalysts in some chemical reactions that are usually atalyzed by noble metals such as Pt azzd Pd. In this sense, Levy and Boudart [a] have