Improved catalytic effect and metal nanoparticle stability using graphene oxide surface coating and reduced graphene oxide for hydrogen generation from ammonia–borane dehydrogenation

Abstract

The development of high catalytic effective catalysts for hydrogen generation through dehydrogenation (hydrolysis) of aqueous NH3BH3 (AB) solution is discussed in this work. Bimetallic NiPt, CoPt and monometallic Ni, Co,...

Metal nanoparticles supported on crystalline Al( OH ) 3 Nano sheets for efficient catalytic hydrogen production from hydrous hydrazine in aqueous solution

“…This is because more agglomeration could occur in preparation for CoNi NPs. This is maybe one of the factors affecting its hydrazine decomposition performance for hydrogen production. where, V H2 is the adsorbed H 2 (mL), SF is the stoichiometry factor (2.9%), MW is the atomic mass of the Pt NPs (g mol −1 ), and W Pt is the mass of the sustained Pt on the sample (g) 38,39 …”

“…where, V H2 is the adsorbed H 2 (mL), SF is the stoichiometry factor (2.9%), MW is the atomic mass of the Pt NPs (g mol À1 ), and W Pt is the mass of the sustained Pt on the sample (g). 38,39 On the other hand, metal dispersion over the metal particle surface size is reported in Table 4. It indicates that Pt acts as a structural promoter because the addition of a small quantity of Pt enhances the metal dispersion, metal particle surface area, and size.…”

“…Be that as it may, Al(OH) 3 utilization is frequently revealed in N 2 H 4 ·H 2 O dehydrogenation. Meanwhile, the previously published research has successfully developed magnetically recyclable Co/ZnO@NiFe 2 O 4 NPs and Bimetallic NiPt, CoPt NPs supported on mixed graphene oxide (GO) for applying hydrogen generation 38,39 . Recognized the importance of this research, the development of highly active and reusable heterogeneous catalysts based on low‐cost metal/Al(OH) 3 Nano sheet is preferred.…”

“…Meanwhile, the previously published research has successfully developed magnetically recyclable Co/ZnO@NiFe 2 O 4 NPs and Bimetallic NiPt, CoPt NPs supported on mixed graphene oxide (GO) for applying hydrogen generation. 38,39 Recognized the importance of this research, the development of highly active and reusable heterogeneous catalysts based on low-cost metal/Al(OH) 3 The preparation procedure for Al(OH) 3 Nano sheets was accomplished utilizing an ethanolprecipitation method. The NaAlO 2 compound was dissolved in water with continuous stirring until completely dissolved.…”

Supported nanocatalysts: recent developments in microwave synthesis for application in heterogeneous catalysis

“…The solid supports help to maintain the size, shape, morphology of nanocatalysts and also limit the leaching of metal ions favorable for achieving durable and enhanced catalytic performance. The solid supports used prominently include graphene, 11,12 Zeolite, 13 Cellulose, [14][15][16] activated coke/carbon, 17,18 Sepiolite, 19 bentonite, 20 SiO 2 , 21,22 Al 2 O 3 23,24 etc. In general, the preparation of supported nanocatalysts is usually followed in two steps.…”