Surface composition changes of CuNi-ZrO<sub>2sub> during methane decomposition: An operando NAP-XPS and density functional study
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- 作者：Astrid Wolfbeisser<sup>asup> ; Gá ; bor Ková ; cs<sup>bsup> ; Sergey M. Kozlov<sup>bsup> ; Karin Fö ; ttinger<sup>asup> ; Johannes Bernardi<sup>csup> ; Bernhard Klö ; tzer<sup>dsup> ; Konstantin M. Neyman<sup>bsup><sup> ; sup><sup>esup><sup> ; sup><sup>konstantin.neyman@icrea.catsup> ; Gü ; nther Rupprechter<sup>asup><sup> ; sup><sup>guenther.rupprechter@tuwien.ac.atsup>
- 关键词：Heterogeneous catalysis ; Nanoparticles ; Surface spectroscopy ; Density functional theory ; Methane ; Bimetallics
- 刊名：Catalysis Today
- 出版年：2017
- 出版时间：1 April 2017
- 年：2017
- 卷：283
- 期：Complete
- 页码：134-143
- 全文大小：2541 K
- 卷排序：283
文摘
Bimetallic CuNi nanoparticles on ZrO2 were characterized by FTIR, NAP-XPS and DFT. After reduction, Cu rich surfaces were observed even for Ni rich nanoparticles. Methane decomposition at 425 °C induced Ni segregation on the surface. DFT indicated that adsorbed CHx provided the major driving force. An “ideal” CuNi nanoparticle is suggested.