Hierarchically structured NiO/CeO2 nanocatalysts templated by eggshell membranes for methane steam reforming
MetadataShow full item record
A template synthesis process has been studied to prepare hierarchically structured NiO/CeO2 nanocatalysts by using eggshell membranes as a template. The templated catalyst is constructed by interwoven ceramic fibres, and the fibres have a nanoporous structure with NiO nanoparticles supported on a CeO2scaffold. The effects of immersion time and calcination temperature on catalyst microstructure were investigated using SEM, XRD, TGA and TPR techniques. The catalyst prepared with an immersion time of 3 h has a robust structure that is able to resist internal thermal stresses caused by cooling down after calcination. Calcination temperature greatly affected the performance of steam reforming via catalyst microstructure. Both particle size and the interaction between NiO and CeO2 determined the reforming performance. The catalyst calcined at 950°C achieved the highest and most stable methane conversion owing to the optimized microstructure. The strong NiO–CeO2 interaction is critical to achieve coking-resistance. The three-dimensional structure of the fibrous catalyst ensured the high thermal stability of the nanocatalyst in terms of high resistance to catalyst sintering.
Showing items related by title, author, creator and subject.
Wang, Zhitao; Shao, Xin; Larcher, A.; Xie, K.; Dong, Dehua; Li, Chun-Zhu (2013)Dry reforming of methane over novel fibrous NiO/CeO2 nanocatalysts was studied to investigate the influence of catalyst microstructure and gas flow rate on carbon formation. X-ray diffraction confirmed no solid solution ...
Nanocatalysts anchored on nanofiber support for high syngas production via methane partial oxidationWang, Zhitao; Cheng, Y.; Shao, Xin; Veder, Jean-Pierre; Hu, X.; Ma, Y.; Wang, J.; Xie, K.; Dong, Dehua; Ping Jiang, S.; Parkinson, G.; Buckley, Craig; Li, Chun-Zhu (2018)© 2018 Nanofibrous NiAl2O4/Al2O3 ceramic was prepared by electrospinning and subsequent calcination at 1000 °C. Under reducing atmosphere, Ni nanoparticles in situ grew from and were rooted in nanofibrous support. The ...
Catalysts of self-assembled Pt@CeO<inf>2âˆ’Î´</inf>-rich core-shell nanoparticles on 3D ordered macroporous Ce<inf>1âˆ’x</inf>Zr<inf>x</inf>O<inf>2</inf>for soot oxidation: nanostructure-dependent catalytic activityWei, Y.; Jiao, J.; Zhang, X.; Jin, B.; Zhao, Z.; Xiong, J.; Li, Y.; Liu, Jian; Li, J. (2017)Â© The Royal Society of Chemistry. The catalytic performance in heterogeneous catalytic reactions consisting of solid reactants is strongly dependent on the nanostructure of the catalysts. Metal-oxides core-shell (MOCS) ...