Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 61, Issue 1, Pages 198-206Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.1c03590
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Funding
- National Natural Science Foundation of China [21776007, 21811530293]
- National Key Research and Development Project [2018YFE0107400]
- Fundamental Research Funds for the Central Universities [XK1802-1]
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In this study, ultrasmall Ni nanoparticles were successfully fabricated via a simple solution method and H-2 reduction, showing competitive reforming performance in CO2 reforming of methane. The bifunctional reaction mechanism on the Ni/Al2O3 catalyst was identified, facilitating the activation of reactant molecules near metal-support interfaces. This work provides new insights into the structure-activity relationships in methane reforming.
Metal size is a critical structural parameter for Ni-based catalysts in CO2 reforming of methane. Herein, ultrasmall Ni nanoparticles (3.7 nm) were fabricated from Ni(OH)(2) precursors on gamma-Al2O3 nanoplates via a simple solution method followed by H-2 reduction. The resultant Ni/Al2O3-IS catalyst showed competitive reforming performance. The turnover frequency reached 15.3 s at 700 degrees C under atmospheric pressure. Methane (CH4) conversion declined marginally from 79.8 to 70.2% after 20 h of reaction. Characterization results reveal that high activity and good stability were endowed by the ultrasmall Ni size and superior coke resistance, respectively. A bifunctional reaction mechanism was identified on the Ni/Al2O3-IS catalyst, wherein the activation of the reactant molecules was facilitated near metal-support interfaces. This work offers a novel strategy to fabricate ultrasmall Ni particles and provides new insights into structure-activity relationships in CO2 reforming of methane.
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