Surface modification of Ni/Al2O3 with Pt: Highly efficient catalysts for H2 generation via selective decomposition of hydrous hydrazine

Complete and Rapid Conversion of Hydrazine Monohydrate to Hydrogen over Supported Ni–Pt Nanoparticles on Mesoporous Ceria for Chemical Hydrogen Storage

“…In the determination of the reaction rate, all the Ni atoms were assumed to take part in the catalytic reaction, and the time required for 50 %c onversion of N 2 H 4 ·H 2 Ow as used in the calculation. [13,15] The selectivity towards H 2 generation from N 2 H 4 ·H 2 Od ecomposition X was evaluated on the basis of Equation (3), which could be derived from Equations (1) …”

H2 production by selective decomposition of hydrous hydrazine over Raney Ni catalyst under ambient conditions

“…To this end, a series of Ni-based bimetallic catalysts were synthesized, including Ni-Rh, Ni-Pt, and Ni-Ir, which showed alomost 100% H 2 selectivity at room temperature. [9][10][11][12][13][14] Although these Ni-based bimetallic catalysts exhibited high selectivity to H 2 , the cost of catalysts was greatly increased with the incorporation of noble metals. Thus, the development of completely noble metal-free catalysts is urgently required for selective decomposition of hydrous hydrazine.…”

Selectivity of Ni-based surface alloys toward hydrazine adsorption: A DFT study with van der Waals interactions

“…The recent experiments [2,3] indicate that a less amount of doped atoms (NiIr 0.059 , NiPt 0.057 ) at the top layer can alter the surface adsorption property of Ni nanoparticles significantly, and exhibit better selectivity and activity for hydrous hydrazine decomposition. With the above information in mind, we constructed a series of models in which the total 16 atoms are All calculations were performed using a plane-wave density functional theory approach with the projector-augmented wave (PAW) method [26,27], as implemented in the Vienna ab initio simulation package (VASP) [28][29][30][31].…”

“…Thus, hydrazine adsorption and reaction phenomena can be found in various important technologies such as fuel-cell [1], chemical hydrogen storage [2,3] and also play an important role as a reduction agent in the synthesize of nanoparticle [4].…”

“…Zhang' group prepared graphene supported Rh-Ni catalysts, with the promotion effect of NaOH, which exhibited 100% selectivity to H 2 and a much higher catalytic efficiency compared with bare Rh-Ni nanoparticles [11]. Meanwhile, the prepared bimetallic nanoparticles of Ni-Pt [12,13], NiPt x /Al 2 O 3 [2], and NiIr x /Al 2 O 3 [3] significantly promoted the reaction rate and the H 2 selectivity. On the other side, theoretical studies of hydrazine decomposition and adsorption were carried out on several metallic surfaces, including Ir(111) [14], Ni(111) [15], Fe(211) [16] and Rh(111) [17] and so on.…”