CeO_x-modified RhNi nanoparticles grown on rGO as highly efficient catalysts for complete hydrogen generation from hydrazine borane and hydrazine

Abstract

Amorphous CeOx-doped Rh-Ni NPs grown on reduced graphene oxide nanosheets have been used as highly efficient and recyclable catalysts for complete hydrogen generation from aqueous solution of N2H4BH3 or N2H4.

Pd–Ni nanoparticles supported on reduced graphene oxides as catalysts for hydrogen generation from hydrazine

“…4,14,15 In comparison, bimetallic materials, especially Ni-based bimetallic materials, are of great importance for the electrochemical production of hydrogen from hydrazine due to the synergetic effect from the inter-metallic combinations of different metals. [16][17][18][19][20][21][22][23][24][25][26][27][28] These bimetallic systems exhibit fast reaction kinetics and high selectivity toward hydrogen generation.…”

About the Technological Readiness of the H2 Generation by Hydrolysis of B(−N)−H Compounds

“…(10)], was reported for bimetallic catalysts such as Rh 4 Ni alloy nanoparticles, Ni 0.6 Pt 0.4 /nanoporous carbon, and Ni 0.58 Pt 0.42 /graphene . However, the release of H 2 is stepwise: the first step is the hydrolysis of the BH 3 group and the reaction is faster than the second step consisting of the dehydrogenation of the N 2 H 4 moiety (Figure ) . The latter reaction starts slowly at the beginning of the process, but ends some time after the former reaction because it takes more time (sluggish kinetics).…”

“…[163] However, the release of H 2 is stepwise:t he first step is the hydrolysiso ft he BH 3 group and the reaction is faster than the second step consistingo ft he dehydrogenation of the N 2 H 4 moiety (Figure 11). [160][161][162][163][164][165][166][167][168][169][170] Thel atter reactions tarts slowlya tt he beginning of the process,b ut ends some time after the former reaction because it takes more time (sluggishk inetics). The current challenge is therefore to identifyac atalyst that can catalyze both reactions with similar kinetics.A nother challenge is the catalyst durability and reusabilityo ver cycles as the state-of-the-art shows am ore or less severed ecrease in both activity and selectivity for successive uses.…”

Hybrid Veil-Like Co(OH)2/rGO Nanocomposites Towards Electrochemical Hydrogen Storage Properties

“…22 Owing to the inherent advantages of reduced graphene oxide (rGO), such as light weight, fantastic thermal/electrical conductivity, mechanical strength and excellent°exibility, rGO has been selected as an ideal substrate for electrochemical study. 23,24 The anchoring of nanoparticles on rGO could be capable of facilitating the electron transfer and mass transport kinetics during the reaction process. 23,24 In this case, vertically aligned Co(OH) 2 nanorods on rGO substrate have been obtained via a facile liquid phased method.…”

“…23,24 The anchoring of nanoparticles on rGO could be capable of facilitating the electron transfer and mass transport kinetics during the reaction process. 23,24 In this case, vertically aligned Co(OH) 2 nanorods on rGO substrate have been obtained via a facile liquid phased method. The obtained products display a desirable electrochemical hydrogen storage capacity of 400 mAh/g, which is À2:85 times higher than that of the chemical precipitation prepared Co(OH) 2 .…”