Graphene-like transition metal carbide [Ti 3 C 2 X 2 (X = OH and/or F)]-supported RuNi bimetallic nanoparticles (NPs) were synthesized from the co-reduction of ruthenium chloride and nickel chloride with Ti 3 C 2 X 2 as a stabilizer and carrier. Ti 3 C 2 X 2 -supported RuNi NPs were well dispersed in aqueous solution. The as-synthesized composites were applied as catalysts in the hydrolysis of ammonia borane (AB), which is a promising solid-state hydrogen storage material for portable fuel cell application . Results indicated that the RuNi/Ti 3 C 2 X 2 catalyst was highly active for the hydrolysis of AB at room temperature , with the highest turnover frequency number of 824.7 mol H 2 ·(mol Ru·min) −1 . The activation energy for the hydrolysis of AB in the aqueous phase reached 25.7 kJ/mol, which was lower than most of the reported values.
Dongpo He,Jingyu Xu,Yanzhu Guo,Mengtian Yu,Qingyu Wang,Jinghui Zhou,Xing Wang
Peanut shell, as a widespread agricultural waste, is a biomass resource rich in lignin that has not been fully utilized. Herein, a novel and efficient hydrogenolysis process was provided for the selective decomposition of peanut shell lignin. Ru and Ni nanoparticles embedded within N-doped nanofibers were synthesized by a simple electrospinning technique and carbonized to obtain a bimetallic catalyst (Ru x Ni y -NCNFs). With the optimized catalyst of Ru 2 Ni 1 -NCNFs, 74.46 wt% of lignin oil was obtained with a char formation rate lower than 2.44 wt% at 300 °C for 3 h without an external hydrogen source . 2D-HSQC-NMR demonstrated that representative interunit linkages, such as β-O-4, β-5, and β-β, were considerably degraded during the depolymerization process. The obtained lignin oil has a narrow molecular weight distribution, low molecular weight and high burning value, indicating that it has great potential to become a high-quality aromatic fuel through subsequent upgrade processing. This study opens a novel avenue toward the exploration of highly efficient but low-cost bimetallic catalysts for lignin hydrogenolysis.
Li Rushuo,Ban Tao,Zhao Danfeng,Lin Jing,Liu Zhiyuan,Wang Linmeng,Huang Xiubing,Tao Zhiping,Wang Ge
Olefin hydrogenation under mild condition is crucial and challenging for industrial applications. Herein, defective UiO-66(Ce) was constructed by using cyanuric acid as the molecular etching “scissors” and further to synthesize heterogeneous catalyst with highly dispersed RuNi nanoparticles (Ru 1 Ni 1.5 @UiO-66(Ce)-12 h). The construction of Ce-O-Ru/Ni heterogeneous interfaces and Ni–Ru bonds provide electron transfer channels from Ce-oxo clusters and Ni species to Ru species. Furthermore, the microenvironment and electronic structure of Ru 0 active sites were synergistically regulated by adjusting the content of metal-organic frameworks (MOFs) defects and Ni promoter, thereby enhancing the adsorption and activation ability of H–H and C=C bonds. Therefore, Ru 1 Ni 1.5 @UiO-66(Ce)-12 h achieved dicyclopentadiene saturated hydrogenation (100% conversion) to tetrahydrodicyclopentadiene (∼ 100% selectivity) under mild condition (35 °C, 1 MPa) with only 25 min. Meanwhile, the sample exhibited excellent structural stability after 6 cycles test. This study provides a promising strategy for the rational design of remarkable noble metal-based catalysts for practical applications.
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