Use of silica-based homogeneously distributed gold nickel nanohybrid as a stable nanocatalyst for the hydrogen production from the dimethylamine borane

Abstract

In this study, the effects of silica-based gold-nickel (AuNi@SiO 2) nanohybrid to the production of hydrogen from dimethylamine borane (DMAB) were investigated. AuNi@SiO 2 nanohybrid constructs were prepared as nanocatalysts for the dimethylamine borane dehydrogenation. The prepared nanohybrid structures were exhibited high catalytic activity and a stable form. The resulting nanohybrid, AuNi@SiO 2 as a nanocatalyst, was tested in the hydrogen evolution from DMAB at room temperature. The synthesized nanohybrids were characterized using some analytical techniques. According to the results of the characterization, it was observed that the catalyst was in nanoscale and the gold-nickel alloys showed a homogenous distribution on the SiO 2 surface. After characterization, the turn over frequency (TOF) of nanohybrid prepared for the production of hydrogen from dimethylamine was calculated (546.9 h −1). Also, the prepared nanohybrid can be used non-observed a significant decrease in activity even after the fifth use, in the same reaction. In addition, the activation energy (E a) of the reaction of DMAB catalyzed AuNi@SiO 2 nanohybrid was found to be 16.653 ± 1 kJmol −1 that facilitated the catalytic reaction. Furthermore, DFT-B3LYP calculations were used on the AuNi@SiO 2 cluster to investigate catalyst activity. Computational results based on DFT obtained in the theoretical part of the study support the experimental data.

Dependence of new environmental nano organic semiconductor nickel-(II)-tetraphenyl-21H,23H-porphyrin films on substrate type for energy storage applications

“…Due to the above context, there is a high demand for different energy types and resources which are depleted and/or renewable to enhance energy storage and clean environment (Alptekin et al 2020). Fuel and/or traditional energy sources cause much environmental pollution, so new researches are needed to focus on clean energy and enhance the energy storage to avoid environmental pollution (Sen et al 2017;Alptekin et al 2020) and save emergency energy; in many cases, energy problems occur and emergency resources are needed instantly and immediately at peak consumption at night or day. In fact, the reality says "there is a huge difference between what is available and what is required" (Warren and Becken 2017;Al-Kuhaili 2019).…”

Easy hydrogenation and dehydrogenation of a hybrid graphene and hexagonal boron nitride monolayer on platinum

“…An interesting aspect of the present system is that the preparation of h-BNG on Pt was performed from the de-hydrogenation DMAB, a molecule with a high H content which can be released at room temperature in the presence of suitable catalysts and it has itself been considered a good candidate for hydrogen storage and production [45]. Thus, this system provides a unique opportunity to have both a safe hydrogen storage and controlled release.…”

DFT investigation of temozolomide drug delivery by pure and boron doped C24 fullerene-like nanocages

“…[2][3][4] In that purpose, nanomaterials (NMs) have emerged in recent decades as very interesting candidates not only for the delivery of anticancer drugs but also to improve the antioxidant capacity of phenolic compounds. [5][6][7] Therefore, theoretical chemistry methods are being extensively employed to evaluate the ability of NMs toward the adsorption of toxic wastes and gases, [8][9][10][11][12][13] heavy metal ions, 14 the catalysis of chemical reactions, 15 and the delivery of drugs of different types, [16][17][18][19][20] just to mention a few. Among these NMs, carbon based NMs (like graphene, nanotubes, nanocones, nanodiamonds and fullerenes) being applied in all the above mentioned elds are of great interest.…”