CO2 activation and reaction with hydrogen on Ni(110): formate formation

Wambach, J.; Illing, G.; Freund, Hans-Joachim

doi:10.1016/0009-2614(91)87194-G

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CO₂ activation and reaction with hydrogen on Ni(110): formate formation

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引用

Wambach, J., Illing, G., & Freund, H.-J. (1991). CO₂ activation and reaction with hydrogen on Ni(110): formate formation. Chemical Physics Letters, 184(1-3), 239-244. doi:10.1016/0009-2614(91)87194-G.

引用: https://hdl.handle.net/21.11116/0000-000E-5510-0

要旨

Upon adsorption of CO₂ at T ≈ 90 K on Ni (110), the molecule weakly chemisorbs and undergoes a geometrical distortion, i.e. it bends into a nonlinear geometry. This geometrical distortion is triggered by electron transfer from the substrate to the molecule, accompanied by formation of an anionic CO^δ−₂ molecule. It is shown via HREELS spectra that CO^δ−₂ reacts with adsorbed H atoms in low concentration (⩽0.1) via a Langumuir-Hinshelwood mechanism to form the formic acid anion, i.e. formate, which remains adsorbed on the surface. Hydrogen coverages, which allow the surface ot reconstruct, inhibit CO₂ chemisorption.