La(OH)3-decorated NiFe nanoparticles as efficient catalyst for hydrogen evolution from hydrous hydrazine and hydrazine borane. (14th April 2020)

• Record Type: Journal Article
• Authors: Zou, Hongtao; Guo, Feng; Luo, Minghong; Yao, Qilu; Lu, Zhang-Hui
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 20(2020)
• Page Start: 11641
• Page End: 11650
• Publication Date: 2020-04-14
• Subjects: Hydrous hydrazine -- Hydrazine borane -- Nanoparticle -- Catalysts -- Hydrogen generation; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.02.074
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Ultrafine NiFe nanoparticles (NPs) decorated by La(OH)3 have been successfully prepared via a facile one-step co-reduction method without the help of surfactant or support. It was found that after being decorated with La(OH)3, the NiFe–La(OH)3 NPs have a smaller particle size and lower crystallinity. The resultant NiFe–La(OH)3 nanocatalyst exhibits an excellent catalytic activity, 100% H2 selectivity, and satisfied recyclability for hydrogen evolution from hydrous hydrazine (N2 H4 ·H2 O) at 343 K under alkaline conditions, giving a high turnover frequency (TOF) value of 100.6 h −1, which is more than 35 times higher than pure NiFe NPs (2.8 h −1 ). The kinetics study shows that with respect to the concentration of catalyst and N2 H4, the N2 H4 dehydrogenation reaction follows fist-order kinetics and zero-order kinetics, respectively. Furthermore, NiFe–La(OH)3 also exhibits an outstanding performance and excellent recycle stability during high dehydrogenation of hydrazine borane (N2 H4 BH3 ). The excellent performances for the dehydrogenation of N2 H4 and N2 H4 BH3 could be attributed to the strong interaction between La(OH)3 and NiFe NPs, as well as ultrafine and low crystalline NiFe NPs due to the addition of La(OH)3 . Graphical abstract: NiFe–La(OH)3 nanoparticles have been facilely synthesized by a one-step method, exhibiting much higher catalytic activity and H2 selectivity than that of pure NiFe NPs. Image 1 Highlights: NiFe–La(OH)3 was prepared via a one-step co-reduction method. The crystallinity and particle size can effectively reduce by addition of La(OH)3 . NiFe–La(OH)3 shows high activity and selectivity for decomposition of N2 H4 . TOF value of NiFe–La(OH)3 is 35-fold higher than that of pure NiFe.