IrNi composite nano catalyst for catalyzing hydrazine borane to produce hydrogen and preparation method thereof

Abstract

The invention provides a IrNi composite nano catalyst for catalyzing hydrazine borane to produce hydrogen and a preparation method thereof. The IrNi composite nano catalyst is prepared by using a soluble Ir source and a soluble Ni source as the metal precursors and La2O2CO3 as the supporter through a sodium hydroxide assisted co-reduction method under room temperature. The prepared IrNi compositenano catalyst has excellent catalytic performance on hydrogen production reaction using hydrazine borane and can efficiently catalyze the hydrazine borane to hydrolyze the boryl of the hydrazine borane and split the hydrazino of the hydrazine borane under 323K so as to achieve complete hydrogen production of the hydrazine borane, and the reaction transformation frequency (TOF) of the IrNi composite nano catalyst reaches up to 950 (mol H2mol metal<-1>h<-1>). The preparation method is simple to operate and promising in development prospect.

Description

technical field [0001] The method of the invention relates to an IrNi composite nano catalyst for catalyzing the hydrogen production of hydrazine borane and a preparation method thereof, belonging to the field of hydrogen storage materials. Background technique [0002] With the continuous consumption of fossil fuels and the increasingly serious environmental problems caused by fossil fuels, it is imminent to develop renewable clean energy to replace traditional fossil fuels. Among the many alternative energy sources, hydrogen energy is known as the next generation of secondary clean energy due to its high energy density, clean and non-polluting, and renewable characteristics. However, economical, safe and efficient hydrogen storage technology and production technology are the bottlenecks hindering the large-scale application of hydrogen energy. Therefore, the development of new safe and efficient hydrogen storage materials and hydrogen production technology is a current re...

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Problems solved by technology

[0007] None of the single metal catalysts reported so far can effectively catalyze the complete hydrogen production from hydrazine borane, among which RhCl has the highest hydrogen selectivity 3 Catalyze 1 mole of hydrazine borane at 323K to release 4.1 moles of hydrogen and nitrogen (Int.J.Hydrogen Energy2012,37, 10758)

In order to be able to increase the H of the catalyst 2 Selectivity and activity, in 2011, French Demirci et al first reported the use of Ni 0.89 Pt 0.11 Alloy nanoparticles can catalyze hydrazine borane to produce hydrogen. At 323K, 1 mole of hydrazine borane can be catalyzed to produce 5.79 moles of hydrogen and nitrogen. However, the conversion frequency (TOF) of the reaction is very low, only 18 mol H 2 mol metal -1 h -1 (Energy Environ. Sci. 2011, 4, 3355)

So far, the catalysts that can completely produce hydrogen from hydrazine borane (5 moles of hydrogen and 1 mole of nitrogen) are mainly nickel-based noble metal alloys Pt-Ni and Rh-Ni catalysts (ACS Catal.2014, 4, 4261; Inorg.Chem. Front., 2018,5,370), and there are generally problems of low catalyst activity and cycle stability

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