Highly Active Ni- and Co-Based Bimetallic Catalysts for Hydrogen Production From Ammonia-Borane
Ammonia-borane is one of the most promising candidates for hydrogen carriers. A series of Ni- and Co-based bimetallic catalysts supported on SiO2 (Ni–M/SiO2 and Co–M/SiO2; M = Ga, Ge, Sn, Zn) was prepared and tested as catalysts for hydrogen production from ammonia-borane (AB) in water or methanol....
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doaj-04b4c0776649494caee4bae7ce10fcf62020-11-25T03:26:22ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462019-03-01710.3389/fchem.2019.00138439146Highly Active Ni- and Co-Based Bimetallic Catalysts for Hydrogen Production From Ammonia-BoraneShinya Furukawa0Shinya Furukawa1Genki Nishimura2Tomoaki Takayama3Takayuki Komatsu4Institute for Catalysis, Hokkaido University, Sapporo, JapanElements Strategy Initiative for Catalysts and Batteries, Kyoto University, Kyoto, JapanDepartment of Chemistry, School of Science, Tokyo Institute of Technology, Tokyo, JapanDepartment of Chemistry, School of Science, Tokyo Institute of Technology, Tokyo, JapanDepartment of Chemistry, School of Science, Tokyo Institute of Technology, Tokyo, JapanAmmonia-borane is one of the most promising candidates for hydrogen carriers. A series of Ni- and Co-based bimetallic catalysts supported on SiO2 (Ni–M/SiO2 and Co–M/SiO2; M = Ga, Ge, Sn, Zn) was prepared and tested as catalysts for hydrogen production from ammonia-borane (AB) in water or methanol. Ni–Zn/SiO2 and Co–Ge/SiO2 exhibited catalytic activities much higher than those of monometallic Ni/SiO2 and Co/SiO2, respectively. Ni–Zn/SiO2 showed a high catalytic activity when water was used as a solvent, where the reaction was completed within 6 min at room temperature with a specific reaction rate of 4.3 ml min−1 mmol-cat−1 mM-AB−1. To the best of our knowledge, this is the highest value among those reported using 3d metal-based catalysts. Co–Ge/SiO2 afforded a five-fold higher reaction rate than that of the corresponding monometallic Co/SiO2. XRD, TEM, and HAADF-STEM-EDS analyses revealed that Ni0.75Zn0.25 and Co0.8Ge0.2 solid-solution alloys were formed with high phase purities. An XPS study showed that Co atoms in Co0.8Ge0.2 were electron-enriched due to electron transfer from Ge to Co, which may be the origin of the improved catalytic activity.https://www.frontiersin.org/article/10.3389/fchem.2019.00138/fullhydrogen productionammonia boranehydrolysisalloycatalyst |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Shinya Furukawa Shinya Furukawa Genki Nishimura Tomoaki Takayama Takayuki Komatsu |
spellingShingle |
Shinya Furukawa Shinya Furukawa Genki Nishimura Tomoaki Takayama Takayuki Komatsu Highly Active Ni- and Co-Based Bimetallic Catalysts for Hydrogen Production From Ammonia-Borane Frontiers in Chemistry hydrogen production ammonia borane hydrolysis alloy catalyst |
author_facet |
Shinya Furukawa Shinya Furukawa Genki Nishimura Tomoaki Takayama Takayuki Komatsu |
author_sort |
Shinya Furukawa |
title |
Highly Active Ni- and Co-Based Bimetallic Catalysts for Hydrogen Production From Ammonia-Borane |
title_short |
Highly Active Ni- and Co-Based Bimetallic Catalysts for Hydrogen Production From Ammonia-Borane |
title_full |
Highly Active Ni- and Co-Based Bimetallic Catalysts for Hydrogen Production From Ammonia-Borane |
title_fullStr |
Highly Active Ni- and Co-Based Bimetallic Catalysts for Hydrogen Production From Ammonia-Borane |
title_full_unstemmed |
Highly Active Ni- and Co-Based Bimetallic Catalysts for Hydrogen Production From Ammonia-Borane |
title_sort |
highly active ni- and co-based bimetallic catalysts for hydrogen production from ammonia-borane |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Chemistry |
issn |
2296-2646 |
publishDate |
2019-03-01 |
description |
Ammonia-borane is one of the most promising candidates for hydrogen carriers. A series of Ni- and Co-based bimetallic catalysts supported on SiO2 (Ni–M/SiO2 and Co–M/SiO2; M = Ga, Ge, Sn, Zn) was prepared and tested as catalysts for hydrogen production from ammonia-borane (AB) in water or methanol. Ni–Zn/SiO2 and Co–Ge/SiO2 exhibited catalytic activities much higher than those of monometallic Ni/SiO2 and Co/SiO2, respectively. Ni–Zn/SiO2 showed a high catalytic activity when water was used as a solvent, where the reaction was completed within 6 min at room temperature with a specific reaction rate of 4.3 ml min−1 mmol-cat−1 mM-AB−1. To the best of our knowledge, this is the highest value among those reported using 3d metal-based catalysts. Co–Ge/SiO2 afforded a five-fold higher reaction rate than that of the corresponding monometallic Co/SiO2. XRD, TEM, and HAADF-STEM-EDS analyses revealed that Ni0.75Zn0.25 and Co0.8Ge0.2 solid-solution alloys were formed with high phase purities. An XPS study showed that Co atoms in Co0.8Ge0.2 were electron-enriched due to electron transfer from Ge to Co, which may be the origin of the improved catalytic activity. |
topic |
hydrogen production ammonia borane hydrolysis alloy catalyst |
url |
https://www.frontiersin.org/article/10.3389/fchem.2019.00138/full |
work_keys_str_mv |
AT shinyafurukawa highlyactiveniandcobasedbimetalliccatalystsforhydrogenproductionfromammoniaborane AT shinyafurukawa highlyactiveniandcobasedbimetalliccatalystsforhydrogenproductionfromammoniaborane AT genkinishimura highlyactiveniandcobasedbimetalliccatalystsforhydrogenproductionfromammoniaborane AT tomoakitakayama highlyactiveniandcobasedbimetalliccatalystsforhydrogenproductionfromammoniaborane AT takayukikomatsu highlyactiveniandcobasedbimetalliccatalystsforhydrogenproductionfromammoniaborane |
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