From electronic structure to catalytic activity: A single descriptor for adsorption and reactivity on transition-metal carbides

Details From electronic structure to catalytic activity: A single descriptor for adsorption and reactivity on transition-metal carbides From electronic structure to catalytic activity: A single descriptor for adsorption and reactivity on transition-metal carbides

2009-05-18

arxiv.org/abs/0905.2877v1

Phys. Rev. Lett. 103, 146103 (2009)

Physics

Computational Physics

5 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.103.146103

Adsorption and catalytic properties of the polar (111) surface of transition-metal carbides (TMC's) are investigated by density-functional theory. Atomic and molecular adsorption are rationalized with the concerted-coupling model, in which two types of TMC surface resonances (SR's) play key roles. The transition-metal derived SR is found to be a single measurable descriptor for the adsorption processes, implying that the Br{\o}nsted-Evans-Polanyi relation and scaling relations apply. This gives a picture with implications for ligand and vacancy effects and which has a potential for a broad screening procedure for heterogeneous catalysts.

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