The CO Absorption on Pt Film Tuned by Ferroelectric Polarization
Abstract: We investigated the CO absorption on Pt film tuned by ferroelectric polarization of BaTiO3 and PbTiO3. Our results have demonstrated that the adsorption properties can be dramatically mod-ulated by the ferroelectric polarization. Especially, we found that the chemisorption energy are −2.53 eV with positive ferroelectric polarization for CO adsorbed on the top site of Pt/PbO/PbTiO3 while the chemisorptions energy reduce to −1.39 eV with inversion of the polarization direction. It is found that the coupling strength for the 4σ, 1π, 5σ orbital and 5d orbital of Pt can be tuned by the interfacial electric filed induced by the polarization of ferroelectric film. Our studies provide new approach for carbon monoxide poisoning resistant in proton exchange membrane catalytic material.
文章引用: 刘 超 , 曹觉先 (2015) 铁电极化调控CO在Pt表面的吸附。 凝聚态物理学进展， 4， 55-61. doi: 10.12677/CMP.2015.42006
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