CaH<sub>2</sub>-Assisted Molten Salt Synthesis of Zinc-Rich Intermetallic Compounds of RhZn<sub>13</sub> and Pt<sub>3</sub>Zn<sub>10</sub> for Catalytic Selective Hydrogenation Application
Zinc-included intermetallic compound catalysts of RhZn, PtZn, and PdZn with a molar ration of Zn/metal = 1/1, which are generally prepared using a hydrogen reduction approach, are known to show excellent catalytic performance in some selective hydrogenations of organic compounds. In this study, in o...
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MDPI AG
2024-03-01
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| author | Yasukazu Kobayashi Koharu Yamamoto Ryo Shoji |
| author_facet | Yasukazu Kobayashi Koharu Yamamoto Ryo Shoji |
| author_sort | Yasukazu Kobayashi |
| collection | DOAJ |
| description | Zinc-included intermetallic compound catalysts of RhZn, PtZn, and PdZn with a molar ration of Zn/metal = 1/1, which are generally prepared using a hydrogen reduction approach, are known to show excellent catalytic performance in some selective hydrogenations of organic compounds. In this study, in order to reduce the incorporated mounts of the expensive noble metals, we attempted to prepare zinc-rich intermetallic compounds via a CaH<sub>2</sub>-assisted molten salt synthesis method with a stronger reduction capacity than the common hydrogen reduction method. X-ray diffraction results indicated the formation of RhZn<sub>13</sub> and Pt<sub>3</sub>Zn<sub>10</sub> in the samples prepared by the reduction of ZnO-supported metal precursors. In a hydrogenation reaction of <i>p</i>-nitrophenol to <i>p</i>-aminophenol, the ZnO-supported RhZn<sub>13</sub> and Pt<sub>3</sub>Zn<sub>10</sub> catalysts showed a higher selectivity than the RhZn/ZnO and PtZn/ZnO catalysts with the almost similar conversions. Thus, it was demonstrated that the zinc-rich intermetallic compounds of RhZn<sub>13</sub> and Pt<sub>3</sub>Zn<sub>10</sub> could be superior selective hydrogenation catalysts compared to the conventional intermetallic compound catalysts of RhZn and PtZn. |
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| last_indexed | 2024-04-24T18:24:48Z |
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| spelling | doaj.art-9fd949de217842a9a2250cd9bac6e9f22024-03-27T13:32:33ZengMDPI AGCrystals2073-43522024-03-0114327810.3390/cryst14030278CaH<sub>2</sub>-Assisted Molten Salt Synthesis of Zinc-Rich Intermetallic Compounds of RhZn<sub>13</sub> and Pt<sub>3</sub>Zn<sub>10</sub> for Catalytic Selective Hydrogenation ApplicationYasukazu Kobayashi0Koharu Yamamoto1Ryo Shoji2Renewable Energy Research Centre, National Institute of Advanced Industrial Science and Technology, 2-2-9 Machiikedai, Koriyama 963-0298, JapanDepartment of Chemical Science and Engineering, National Institute of Technology, Tokyo College, 1220-2 Kunugida, Hachioji 193-0997, JapanDepartment of Chemical Science and Engineering, National Institute of Technology, Tokyo College, 1220-2 Kunugida, Hachioji 193-0997, JapanZinc-included intermetallic compound catalysts of RhZn, PtZn, and PdZn with a molar ration of Zn/metal = 1/1, which are generally prepared using a hydrogen reduction approach, are known to show excellent catalytic performance in some selective hydrogenations of organic compounds. In this study, in order to reduce the incorporated mounts of the expensive noble metals, we attempted to prepare zinc-rich intermetallic compounds via a CaH<sub>2</sub>-assisted molten salt synthesis method with a stronger reduction capacity than the common hydrogen reduction method. X-ray diffraction results indicated the formation of RhZn<sub>13</sub> and Pt<sub>3</sub>Zn<sub>10</sub> in the samples prepared by the reduction of ZnO-supported metal precursors. In a hydrogenation reaction of <i>p</i>-nitrophenol to <i>p</i>-aminophenol, the ZnO-supported RhZn<sub>13</sub> and Pt<sub>3</sub>Zn<sub>10</sub> catalysts showed a higher selectivity than the RhZn/ZnO and PtZn/ZnO catalysts with the almost similar conversions. Thus, it was demonstrated that the zinc-rich intermetallic compounds of RhZn<sub>13</sub> and Pt<sub>3</sub>Zn<sub>10</sub> could be superior selective hydrogenation catalysts compared to the conventional intermetallic compound catalysts of RhZn and PtZn.https://www.mdpi.com/2073-4352/14/3/278molten salt synthesisCaH<sub>2</sub>intermetallic compoundRhZn<sub>13</sub>Pt<sub>3</sub>Zn<sub>10</sub>hydrogenation of <i>p</i>-nitrophenol |
| spellingShingle | Yasukazu Kobayashi Koharu Yamamoto Ryo Shoji CaH<sub>2</sub>-Assisted Molten Salt Synthesis of Zinc-Rich Intermetallic Compounds of RhZn<sub>13</sub> and Pt<sub>3</sub>Zn<sub>10</sub> for Catalytic Selective Hydrogenation Application Crystals molten salt synthesis CaH<sub>2</sub> intermetallic compound RhZn<sub>13</sub> Pt<sub>3</sub>Zn<sub>10</sub> hydrogenation of <i>p</i>-nitrophenol |
| title | CaH<sub>2</sub>-Assisted Molten Salt Synthesis of Zinc-Rich Intermetallic Compounds of RhZn<sub>13</sub> and Pt<sub>3</sub>Zn<sub>10</sub> for Catalytic Selective Hydrogenation Application |
| title_full | CaH<sub>2</sub>-Assisted Molten Salt Synthesis of Zinc-Rich Intermetallic Compounds of RhZn<sub>13</sub> and Pt<sub>3</sub>Zn<sub>10</sub> for Catalytic Selective Hydrogenation Application |
| title_fullStr | CaH<sub>2</sub>-Assisted Molten Salt Synthesis of Zinc-Rich Intermetallic Compounds of RhZn<sub>13</sub> and Pt<sub>3</sub>Zn<sub>10</sub> for Catalytic Selective Hydrogenation Application |
| title_full_unstemmed | CaH<sub>2</sub>-Assisted Molten Salt Synthesis of Zinc-Rich Intermetallic Compounds of RhZn<sub>13</sub> and Pt<sub>3</sub>Zn<sub>10</sub> for Catalytic Selective Hydrogenation Application |
| title_short | CaH<sub>2</sub>-Assisted Molten Salt Synthesis of Zinc-Rich Intermetallic Compounds of RhZn<sub>13</sub> and Pt<sub>3</sub>Zn<sub>10</sub> for Catalytic Selective Hydrogenation Application |
| title_sort | cah sub 2 sub assisted molten salt synthesis of zinc rich intermetallic compounds of rhzn sub 13 sub and pt sub 3 sub zn sub 10 sub for catalytic selective hydrogenation application |
| topic | molten salt synthesis CaH<sub>2</sub> intermetallic compound RhZn<sub>13</sub> Pt<sub>3</sub>Zn<sub>10</sub> hydrogenation of <i>p</i>-nitrophenol |
| url | https://www.mdpi.com/2073-4352/14/3/278 |
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