Roles of Al2O3 coating layer on an ordered mesoporous Ni/m-Al2O3 for combined steam and CO2 reforming with CH4open access
- Authors
- Yu, J.S.[Yu, J.S.]; Park, J.M.[Park, J.M.]; Kwon, J.H.[Kwon, J.H.]; Park, K.S.[Park, K.S.]; Choung, J.W.[Choung, J.W.]; Park, M.-J.[Park, M.-J.]; Bae, J.W.[Bae, J.W.]
- Issue Date
- 1-Jan-2023
- Publisher
- Elsevier Ltd
- Keywords
- Combined steam and CO2 reforming with CH4 (CSCR); Ordered mesoporous Al2O3 (m-Al); Overlayer Al2O3 coating; Resistance to coke formation; Thermal stability of Ni nanoparticles
- Citation
- Fuel, v.331
- Indexed
- SCOPUS
- Journal Title
- Fuel
- Volume
- 331
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/100718
- DOI
- 10.1016/j.fuel.2022.125702
- ISSN
- 0016-2361
- Abstract
- To enhance catalytic and thermal stability of Ni nanoparticles for a combined steam and CO2 reforming with CH4 (CSCR), the utilization of an ordered mesoporous Al2O3 support with ∼6 nm of average pore diameter (Ni/m-Al) was proposed in terms of spatial confinement effects of the Ni nanoparticles with the help of successive Al2O3 overlayer protective layers (Ni/m-Al@Al). At an optimal amount of Al2O3 coating layers less than ∼3 wt%, the much higher catalytic activity and stability were observed on the Ni/m-Al@Al(3). The synergy effects of Al2O3 overlayers on the ordered mesoporous Ni/m-Al were mainly attributed to the formation of strongly interacted Ni-Al2O3 interfaces as supported by its higher XPS binding energy in the spatially restricted mesoporous m-Al channels with the protective metal oxide overlayers. Those structures were also responsible for the suppressed migrations of the spatially confined Ni nanoparticles to the outer m-Al surfaces by Al2O3 protective overlayers, which resulted in an excellent long-term stability with small coke depositions by preserving the original Ni nanoparticle sizes. © 2022 Elsevier Ltd
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