Surface Electronic Properties of Tungsten, Tungsten Carbide, and Platinum

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Science  19 Jul 1974:
Vol. 185, Issue 4147, pp. 258-260
DOI: 10.1126/science.185.4147.258


The local electronic structures of the surface regions of tungsten, tungsten carbide, and platinum have been compared. Contrary to the hypothesis that the platinum-like catalytic activity of tungsten carbide results from the contribution of carbon valence electrons to the 5d band of tungsten, the width of the unfilled portion of the d band increases on going from tungsten to tungsten carbide.