Eco-Friendly Synthesis of Carboxymethyl Cellulose-Stabilized Ru_0.57Co_0.43 Nanoclusters as Extremely Efficient and Durable Catalysts for Hydrolytic Dehydrogenation of Methylamine Borane

Abstract

Herein, we report the first ever eco-friendly and easy synthesis of carboxymethyl cellulose-stabilized RuCo nanoclusters (Ru 0.57 Co 0.43 @CMC) and their use as highly efficient and durable catalysts to produce hydrogen from hydrolytic dehydrogenation of methylamine borane (MeAB). Ru 0.57 Co 0.43 @CMC nanoclusters are easily synthesized from synchronous chemical reduction of suitable water-soluble cobalt and ruthenium salts by sodium borohydride. They are identified by some advanced methods including ultraviolet− visible spectroscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. All related kinetic studies show that Ru 0.57 Co 0.43 @CMC nanoclusters are extremely efficient, relatively cost-saver, and durable catalysts in hydrolytic dehydrogenation of MeAB at very low temperatures. They provided the highest ever initial turnover frequency value of 327.1 min −1 and also the apparent activation energy of 49.7 kJ/mol for the hydrolytic dehydrogenation of MeAB.

Green Approaches to Dehydrogenation of DMAB Catalyzed by Starch Stabilized Ru(0), Cu(0) and Ni(0) Nanoparticles in the Absence of a Solvent

“…Up to now, many catalysts containing natural materials in their entities have been designed to catalyze hydrogen evolution from amine boranes such as Rh stabilized on hyper crosslinked polymer, [16] Cu−Ni−Co NPs stabilized on metal‐organic frameworks (MOF), [17] CMC stabilized RuCo NPs, [18] polypyrrole nanotubes, [19] Ag promoted Pd NPs on MOF coated natural wood, [20] magnetic N‐functionalized carbon (CN) encapsulated Ni composite [21] . Use of polysaccharides such as starch can be used to control the growth of nanoparticles (NPs).…”

Solventless Dimethylamine Borane Dehydrogenation in the Presence of Transition Metal(0) Nanoparticles Loaded on Cellulose

“…All these excellent properties make cellulose better substitutes for ordinary organic and inorganic supporting materials for different catalyst preparations. In a recent study, carboxymethyl cellulose (CMC) was used to stabilize Ru 0.57 Co 0.43 nanoclusters that was employed as catalyst in the environmentally friendly hydrolytic dehydrogenation of methylamine borane at room temperature (RT) [35] . Besides, cellulose with its chemical formula (C 6 H 10 O 5 ) n can also be recovered from recycled substance (e. g. packing paper, newspaper, etc.).…”

“…In a recent study, carboxymethyl cellulose (CMC) was used to stabilize Ru 0.57 Co 0.43 nanoclusters that was employed as catalyst in the environmentally friendly hydrolytic dehydrogenation of methylamine borane at room temperature (RT). [35] Besides, cellulose with its chemical formula (C 6 H 10 O 5 ) n can also be recovered from recycled substance (e. g. packing paper, newspaper, etc.). In recent years, researchers have focused on the use of cellulose because of environmental concerns and green practices.…”

Nanoceria‐Supported Ru‐Based Nanoparticles as Highly Efficient Catalysts for Hydrolysis of Ethane 1,2‐Diamine Borane

“…[5] However, the formation of some volatile side products such as ammonia, borazine, or diborane in the dehydrogenation of AB limits its employment in the on-board systems since they are poisonous for the fuel cells. [6,7,8] In this context, carbon derivatives of AB including methylamine borane (BH 3 NH 2 CH 3 , MeAB), [9,10] dimethylamine borane (BH 3 NH(CH 3 ) 2 , DMAB), [11] hydrazine borane (BH 3 N 2 H 4, HB), [12,13] and ethane 1,2-diamine borane ((BH 3 NH 2 CH 2 ) 2 , EDAB) [14,15] are regarded as very promising candidates.…”