title: Baize-like CeO2and NiO/CeO2nanorod catalysts prepared by dealloying for CO oxidation.
abstract: Baize-like monolithic CeO2and NiO/CeO2nanorod catalysts were prepared by combined dealloying and calcination and the catalytic activities were evaluated using CO catalytic oxidation. The CeO2catalysts were composed of nanorods and exhibited a three-dimensional supporting structure with pores. After introduction of NiO, dispersed NiO nanosheets and nanoparticles were supported on the surface of CeO2nanorods and they were not well-crystallined due to CeO2inhibiting the NiO crystallization. The Raman and x-ray photoelectron spectroscopy analyses revealed that the introduction of NiO species into CeO2generated more coordinate unsaturated Ni atoms, oxygen vacancies, defects and active sites for CO catalytic reactions. The reaction activation energy of NiO/CeO2nanorod catalyst prepared from the Al83Ce10Ni7precursor alloy was just 31.2 kJ mol-1and the CO conversion can reach up to 97% at 240 °C, which was superior to that of pure CeO2and nanoporous NiO. The enhanced catalytic activity of baize-like NiO/CeO2nanorods can be attributed to the strong synergistic effects between finely dispersed NiO species and surface oxygen vacancies in CeO2nanorods.
authors.affiliation: School of Science, MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
authors.forename: Xiaolong
authors.initials: X
authors.lastname: Zhang
authors.forename: Kun
authors.initials: K
authors.lastname: Li
authors.forename: Wenyu
authors.initials: W
authors.lastname: Shi
authors.forename: Caihua
authors.initials: C
authors.lastname: Wei
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Song
authors.forename: Sen
authors.initials: S
authors.lastname: Yang
authors.forename: Zhanbo
authors.initials: Z
authors.lastname: Sun