Bimetallic RuM (M=Co, Ni) Alloy NPs Supported on MIL-110(Al): Synergetic Catalysis in Hydrolytic Dehydrogenation of Ammonia Borane

Abstract

By adjusting various Ru/M (M=Co, Ni) molar ratios, a series of highly dispersed bimetallic RuM alloy nanoparticles (NPs) anchored on MIL-110(Al) have been successfully prepared via a conventional impregnation-reduction method. And they are first used as heterogeneous catalysts for the dehydrogenation reaction of AB at room temperature. The results reveal that the as-prepared Ru 1 Co 1 @MIL-110 and Ru 1 Ni 1 @MIL-110 exhibit the highest catalytic activities in different RuCo and RuNi molar ratios, respectively. It is worthy of note that the turnover frequency (TOF) values of Ru 1 Co 1 @MIL-110 and Ru 1 Ni 1 @MIL-110 catalysts reached 488.1 and 417.1 mol H 2 min −1 (mol Ru) −1 and the activation energies (E a) are 31.7 and 36.0 kJ/mol, respectively. The superior catalytic performance is attributed to the bimetallic synergistic action between Ru and M, uniform distribution of metal NPs as well as bi-functional effect between RuM alloy NPs and MIL-110. Moreover, these catalysts exhibit favorable stability after 5 consecutive cycles for the hydrolysis of AB.

Hierarchical Porous g-C3N4 Coupled Ultrafine RuNi Alloys as Extremely Active Catalysts for the Hydrolytic Dehydrogenation of Ammonia Borane

“…And the ones at 282.9 and 280.7 eV are designated to Ru 0 3d 3/2 and Ru 0 3d 5/2 , respectively. , The other peaks appearing at 284.3 and 281.5 eV correspond to Ru n + 3d 3/2 and Ru n + 3d 5/2 , respectively. Meanwhile, the characteristic peaks of Ru 3p 3/2 and Ru 3p 1/2 are located at 459.0 and 481.3 eV in the Ru 3p XPS spectrum (Figure d), respectively. − Figure e reveals that the binding energies of Ni 2p 3/2 and Ni 2p 1/2 are appeared at 852.6 and 870.0 eV, respectively. The two satellite peaks centered on 858.3 and 876.2 eV belong to Ni 2p 3/2 and Ni 2p 1/2 , respectively, which suggests the existence of Ni n + species such as Ni­(OH) 2 and NiO. , The formation of Ru n + and Ni n + species presumably occurs within the sample preparation procedure for XPS measurements, or might result from the part oxidation of RuNi NPs when being exposed in air.…”

A facile synthesis of monodisperse cobalt–ruthenium alloy nanoparticles as catalysts for the dehydrogenation of morpholine borane and the hydrogenation of various organic compounds

“…For this reason, most of the reported CoRu alloy NPs synthesis protocols rely on the impregnation of metal precursors into the support materials and then following reduction of the metal precursors at high temperature. [24][25][26][27][28][29][30][31][32][33][34][35][36] These synthesis protocols yielded polydisperse CoRu NPs with lack of composition control and proof of alloy formation. In this regard, an appropriate method, especially colloidal synthesis method, is needed to prepare CoRu alloy NPs with a monodisperse size distribution and composition control.…”