Graphene supported Ru@Co core–shell nanoparticles as efficient catalysts for hydrogen generation from hydrolysis of ammonia borane and methylamine borane

Magnetic RuCo nanoparticles supported on two-dimensional titanium carbide as highly active catalysts for the hydrolysis of ammonia borane

“…Bimetallic Ru 1 Co 9 /Ti 3 C 2 X 2 exhibits the highest TOF value of 896 mol H 2 $(molRu$min) À1 , whereas the catalysts Ru 2 Co 8 /Ti 3 C 2 X 2 and Ru 3 Co 7 /Ti 3 C 2 X 2 show 643 and 600 mol H 2 $(mol Ru$min) À1 , respectively. The results further confirm the synergistic effect of Ru and Co NPs on Ti 3 C 2 X 2 sheets for the catalytic hydrolysis of AB [14]. Therefore, Ru 1 Co 9 /Ti 3 C 2 X 2 was applied for further investigation.…”

“…However the extensive use of ruthenium based catalysts is limited by the scarcity and high cost of ruthenium. A feasible solution is to prepare bimetallic catalysts through the introduction of certain amount of non-noble metal components such as Co [14,15], Ni [16e18], and Cu [15,19]. This strategy reduces the use of ruthenium and provides notable improvement in the catalytic activity of these catalysts by interplaying electronic and lattice effects of the neighboring metals [14].…”

“…Metal oxides, activated carbons, xonotlite, hydroxyapatite, graphitic carbon nitride, and metal-organic frameworks have been employed as catalyst supports to stabilize Ru based NPs for AB hydrolysis [6,9e13,15,21,22]. The two-dimensional graphene has attracted great attention as supporting material for hydrogen generation from AB hydrolysis because of its large and highlyaccessible surface with controlled chemistries [14,16,19,23,24]. These characteristics improve the dispersion and stability of the metal NPs on graphene surface.…”

PVP-stabilized Ru–Rh nanoparticles as highly efficient catalysts for hydrogen generation from hydrolysis of ammonia borane

“…Ni@Ru coreeshell nanoparticles [4], NieRu alloy nanoparticles [5], RuCo and RuCu on ɤ-Al 2 O 3 [6], RuCu on graphene [7], Ru@Ni coreeshell nanoparticles [8], CueNi on MCM-41 [9], Ru@Co on graphene [10], CoNi@rGO [11], CuCo@MOF nanoparticles [12], Ni/Pt hollow nanospheres [13], Ag/Pd@nanofiber nanoparticles [14], Pt-M (M ¼ Fe, Co, Ni) nanoparticles [15], AuCo@MOF nanoparticles [16], PteCo@GO nanoparticles [17], NiPd@rGO nanoparticles [18], CuNi nanoparticles [19], and Cu@Co on rGO nanoparticles [20] are the examples of those type of catalysts. Very recently, poly(N-vinyl-2-pyrrolidone (PVP))-protected bimetallic nanoparticles, such as rutheniumepalladium [21], platinumeruthenium [22], palladiumerhodium [23], and palladiumeplatinum [24] nanoparticles, have been shown to be highly efficient catalysts for hydrogen generation from boron compounds providing remarkable results.…”

Graphene-supported metal/metal oxide nanohybrids: synthesis and applications in heterogeneous catalysis

“…131 The composition of the NiPd NPs could be tuned easily, and Ni 30 Pd 70 was found to be the most active one, with the initial TOF value of 28.7 min -1 . Moreover, graphenesupported bimetallic core-shell NPs such as Pd@Co, 132 Ru@Co, 133 Ru@Ni, 134 Cu@Co, 135 Ag@Ni, 136 and Ag@Co 137 were synthesized via one-step coreduction using AB as the reductant based on the distinction in the reduction potentials of the two metal precursors. 4).…”