title: Ni Nanoparticles Supported on Cage-Type Mesoporous Silica for CO2 Hydrogenation with High CH4 Selectivity.
abstract: Ni nanoparticles (around 4 nm diameter) were successfully supported on cage-type mesoporous silica SBA-16 (denoted as Ni@SBA-16) via wet impregnation at pH 9, followed by the calcination-reduction process. The Ni@SBA-16 catalyst with a very high Ni loading amount (22.9 wt %) exhibited exceptionally high CH4 selectivity for CO2 hydrogenation. At a nearly identical loading amount, the Ni@SBA-16 catalysts with smaller particle size of Ni NPs surprisingly exhibited a higher catalytic activity of CO2 hydrogenation and also led to a higher selectivity on CH4 formation than the Ni@SiO2 catalysts. This enhanced activity of the Ni@SBA-16 catalyst is suggested to be an accumulative result of the advantageous structural properties of the support SBA-16 and the well confined Ni NPs within the support; both induced a favorable reaction pathway for high selectivity of CH4 in CO2 hydrogenation.
authors.affiliation: Department of Chemistry, National Central University, Chung-Li, 32054, Taiwan.
authors.forename: Canggih Setya
authors.initials: CS
authors.lastname: Budi
authors.affiliation: Center for General Education, Chang Gung University, 259, Wen-Hua 1st Rd., Guishan Dist., Taoyuan City, 33302, Taiwan.
authors.forename: Hung-Chi
authors.initials: HC
authors.lastname: Wu
authors.affiliation: Center for General Education, Chang Gung University, 259, Wen-Hua 1st Rd., Guishan Dist., Taoyuan City, 33302, Taiwan. cschen@mail.cgu.edu.tw.|Department of Pathology, Chang Gung Memorial Hospital, 5, Fusing St., Guishan Dist., Taoyuan City, 33302, Taiwan. cschen@mail.cgu.edu.tw.
authors.forename: Ching-Shiun
authors.initials: CS
authors.lastname: Chen
authors.affiliation: Department of Chemistry, National Central University, Chung-Li, 32054, Taiwan.
authors.forename: Diganta
authors.initials: D
authors.lastname: Saikia
authors.affiliation: Department of Chemistry, National Central University, Chung-Li, 32054, Taiwan. hmkao@cc.ncu.edu.tw.
authors.forename: Hsien-Ming
authors.initials: HM
authors.lastname: Kao
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry*; D002384:Catalysis; D006865:Hydrogenation; D053768:Metal Nanoparticles / Q000737:chemistry*; D008697:Methane / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: C000600619:SBA-16; D002245:Carbon Dioxide; D012822:Silicon Dioxide; D009532:Nickel; D008697:Methane
keywords: carbon dioxide; hydrogenation; mesoporous silica; methane selectivity; nickel