Hydrogen Generation from Ammonia Borane over Ru/Nanoporous CeO₂ Catalysts Prepared from Amorphous Alloys

Abstract

CeO 2 supports were prepared via a dealloying method from amorphous alloy. The activities of Ru/CeO 2 catalysts were examined in the hydrogen generation reaction from ammonia borane. To investigate the effects of atomic arrangement of CeO 2 precursor on the activities of Ru/ CeO 2 catalysts, CeO 2 supports were prepared from amorphous alloys and crystalline alloys. The use of amorphous alloys as the precursor of CeO 2 created fine porous structures, resulting in high catalytic activities of Ru/CeO 2 catalysts.

Hydrolytic Dehydrogenation of Ammonia Borane Attained by Ru-Based Catalysts: An Auspicious Option to Produce Hydrogen from a Solid Hydrogen Carrier Molecule

“…It was claimed that the amino groups were located at the acid linkers in MIL-53(Al)-NH2, and served as Lewis bases, thus stabilizing the Ru precursor (i.e., RuCl3) during the impregnation step. Some examples of the use of other oxides such as titania (TiO 2 ) [90,103], ceria (CeO 2 ) [104,105], and hafnia (HfO 2 ) [91] as catalytic supports of Ru NPs for the hydrolytic dehydrogenation of AB can also be found in the literature.…”

Pd-Dispersed CeO₂ Catalyst Prepared from Dealloying the Pd–Ce–Al Ternary Amorphous Alloy Used for Oxidation Reaction

“…9) In our previous studies, 1013) the CeO 2 porous particles prepared from dealloying of a CeAl amorphous alloy as the precursor alloy were found to be higher in surface area than a commercial CeO 2 , controlling their size and morphology as a function of dealloying time and precursor crystallinity. It was clearly showed that the catalysts composed of AuPd, 10) Ru, 11) Ni, 12) and Au 13) supported-CeO 2 from an amorphous alloy showed higher catalytic activity in hydrogen generation 1012) and oxidation 13) reactions than use of CeO 2 prepared from a crystalline alloy.…”

Positive Effects of CeO₂ Promoter and Co-Reactant/CO on Methanation of CO₂-Rich Gas over Ni/SBA-15 Catalyst

“…16,17) Among them, CeO 2 is used as a catalyst support in CO oxidation, NO x purification reaction, and water gas shift reaction. 18) Besides that, CeO 2 has been widely studied as a promising promoter due to its excellent capability of: (i) stabilizing metal particles against thermal sintering, 19) (ii) modifying the structural and electronic properties of Ni, 20) (iii) enhancing the interaction between Ni particles and support, 21) thus, (iv) controlling the growth of the active metal. 22) In addition, it was reported that CeO 2 could promote effectively the adsorption and activation of CO 2 molecules on the MgAl 2 O 4 supported NiCeO 2 ZrO 2 catalyst due to its oxygen exchange capacity.…”