CeO<sub>2</sub> Nanorod@NiPhy Core‐shell Catalyst for Methane Dry Reforming: Effect of Simultaneous Sintering Prevention of CeO<sub>2</sub> Support and Active Ni
Mingyue Liao, Yingying Chen, Minmin Chen, Kang Hui Lim, ziwei Li, Hong Wu, Xiong He, Qiao Zhou, Sibudjing Kawi
Abstract
Abstract Preventing the sintering of nano‐catalyst is crucial to maintain their performance especially for high‐temperature reactions such as CO 2 reforming of methane (DRM) reaction. In this paper, we design CeO 2 nanorod@Ni phyllosilicate (CeO 2 @NiPhy) catalysts with different NiPhy shell thickness to simultaneously preserve the morphology of CeO 2 nanorod and prevent the sintering of Ni. Compared with Ni/CeO 2 supported catalyst, CeO 2 @NiPhy core‐shell catalyst with a shell thickness of 9 nm exhibits much better performance for DRM with stable CH 4 and CO 2 conversions of 75 % and 80 % respectively and lower carbon deposition due to high Ni sintering resistance and higher thermal stability of CeO 2 during calcination and DRM reaction thereby higher oxygen vacancies concentration. In‐situ diffuse reflectance infrared Fourier transform spectra result demonstrates that DRM reaction takes place with a bi‐functional mechanism on CeO 2 @NiPhy. This design strategy can be applied to prepare other nano‐catalysts with high sintering resistance of both active metal and catalyst support for high‐temperature applications.