Monodisperse Nickel Nanoparticles and Their Catalysis in Hydrolytic Dehydrogenation of Ammonia Borane

Abstract

Monodisperse nickel nanoparticles are prepared from the reduction of Ni(acac)(2) with borane tributylamine in the presence of oleylamine and oleic acid. Without any special treatment to remove the surfactants, the as-synthesized Ni nanoparticles supported on the Ketjen carbon support exhibit high catalytic activity in hydrogen generation from the hydrolysis of the ammonia-borane (H(3)NBH(3)) complex with a total turnover frequency value of 8.8 mol of H(2) x (mol of Ni)(-1) x min(-1). Such catalysis based on Ni nanoparticles represents a promising step toward the practical development of the H(3)NBH(3) complex as a feasible hydrogen storage medium for fuel cell applications.

Carbon nanotubes as electronic interconnects in solid acid fuel cell electrodes

“…21 Nickel nanoparticles were synthesized following a procedure described by Metin et al 22 In brief, 1.03 g of nickel acetylacetonate was mixed with 60 mL of oleylamine and 1.2 mL of oleic acid in a nitrogen environment. Moisture and oxygen were removed from this solution by heating it to 110 1C and holding at that temperature for one hour.…”

“…Typical particle sizes obtained using this method are 3.2 nm. 22 Immediately prior to dispensing on the carbon paper, the suspension was subjected to ultra-sonication for one hour to encourage the break-up of agglomerates. The catalyst particles were applied to the carbon paper substrates (Toray-H-120, 5 Â 5 mm 2 in area) by spin coating.…”

Cobalt and nickel nanoparticles fabricated p(NIPAM-co-MAA) microgels for catalytic applications

“…The catalytic applications of nanoparticles of expensive metals such as gold (1,12), silver (2,3,13), platinum (14)(15)(16) and palladium (17)(18)(19)(20) are mostly studied because they are stable under different environmental conditions and do not oxidize to their oxides easily. Contrary to this, there are some coinage metal-based nanoparticles [such as zinc (21), copper (22,23), nickel (Ni) (24) and cobalt (Co) (25) whose catalytic applications have not been enormously studied so far, because they are less stable. These metals and their salts are less expensive than silver and gold; thus we are going to report on the catalytic applications of the nanoparticles of these metals.…”

Modification of Carbon Nanotubes as an Effective Solution for Cancer Therapy

“…These applications associate closely with the unique magnetic properties of MNPs with comparable size to biologically important objects. Magnetic CNTs have also illustrated favorable outcomes as a MRI contrast agent with high nuclear magnetic resonance relaxivities, little cytotoxicity, catalysis [152], magnetic hyperthermia [153] and high cell-labeling efficiency [154]. As mentioned earlier, CNTs possess also a hollow cavity that can be filled with a variety of metals such as Au, Ag, Cu, Sn, Fe, Co, and Ni and employed as nano-antennas or microscopic probes [154][155][156].…”