Gold nanoparticles as a catalyst for dehydrogenation reaction of dimethylamine borane at room temperature

Analytical study to determine the optical properties of gold nanoparticles in the visible solar spectrum

“…A strong wavelength peak at 530 nm was observed with the peak formed after 30 min of the reduction with DMAB, and by increasing the reduction time a slight blue shift (~30 nm) was observed in this peak and this occurred as a consequence of the effect of quantum confinement, which confirms that, the strong absorption wavelengths be smaller with smaller NPs and longer with increasing the size, and this leads to produce high and low energy band gaps, respectively [42]. In addition to the emerging a slightly blue shift in the positions of the SPR bands after 30 min of reduction time, noticeably, a gradual decrease in the intensity of the absorption band can, also, be seen after 30 min of the reducing time and this may be attributed to the formation of an agglomeration in the formed NPs which led to decline the photocatalytic of AuNPs as a result of decrease both the surface area and the possibility to access into the active sites [3,27]. Figure 2 (a) shows a kinetic study for monitoring time-dependent using UV-Vis spectroscopy of the formed AuNPs, the data display that the optimum time was to be 30 min.…”

“…The data obtained by monitoring time-dependent to indicate the location of the surface plasmon resonance (SPR) for the AuNPs, that formed after reducing the polymer of Au(I):6-thioguanosine hydrogel by using DMAB, were used in this study [27]. The data were carried out by achieving a kinetic study to measure the absorption by using a Cary 100 Bio UV-Vis spectrophotometer with a quartz cuvette at room temperature with a wavelength in the range of 200-600 nm.…”

“…A typical sample of Au(I) hydrogel was prepared by drop-casting 2 μL of the gel into a clean silicon wafer, after leaving to dry in the air, the sample was exposed to DMAB (0.1-0.3 g) in solvent-free medium at room temperature for 1 h. The reaction occurred in a sealed glass Petra-dish [27].…”

Polymer Hydrogel Supported Ni/Pd Alloys for Hydrogen Gas Production from Hydrolysis of Dimethylamine Borane with a Long Recyclable Lifetime

“…DMAB is cheaper and better than NaBH 4 and AB on the market, with the potential to reduce the cost of hydrogen production. At present, most hydrogen production reactions based on DMAB are carried out in organic solvents such as dioxane, tetrahydrofuran, and toluene [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ] or via solvent-free dehydrogenation of DMAB [ 23 , 24 , 25 ]. However, in terms of green energy and safety, it is of critical importance to replace the organic solvents with water.…”

Pd/BP2000 Nanocomposites: Efficient Catalyst for Hydrolytic Dehydrogenation of Ammonia-borane

“…At this point, researchers ınterested in some compounds which has high hydrogen capacity. Formic acid [1], dimethlyamine borane [2][3][4][5], methlyamine borane [6] and ammonia-borane [7][8][9][10] are high hydrogen containing compounds. Ammoniaborane is well-known hydrogen carrier with the capacity of 19.6% hydrogen.…”