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Preparation method of nano-porous Ru-Fe-Co alloy with high ammonia borane hydrolysis hydrogen production catalytic activity

A ru-fe-co, nanoporous technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of complex preparation process and achieve simple process , Improve the structure uniformity, the effect of high specific surface area

Pending Publication Date: 2021-10-22
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiency of existing Ru-based catalysts for hydrogen production by ammonia borane hydrolysis or the technical problems of complex preparation process, the present invention provides a nanoporous Ru-Fe-Co alloy with high catalytic activity for hydrogen production by ammonia borane hydrolysis Preparation

Method used

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  • Preparation method of nano-porous Ru-Fe-Co alloy with high ammonia borane hydrolysis hydrogen production catalytic activity
  • Preparation method of nano-porous Ru-Fe-Co alloy with high ammonia borane hydrolysis hydrogen production catalytic activity
  • Preparation method of nano-porous Ru-Fe-Co alloy with high ammonia borane hydrolysis hydrogen production catalytic activity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: The precursor alloy composition is Fe 65 Ru 5 B 30

[0039] Step 1: Prepare master alloy ingot

[0040] Select Fe, Ru, and B raw materials with a purity of not less than 99% by weight to weigh the ingredients according to the proportion of the precursor alloy; smelt the weighed raw materials in a vacuum arc melting furnace under an argon atmosphere to obtain a uniform composition. master alloy ingot;

[0041] Step 2: Preparation of Alloy Strips

[0042] Under an argon atmosphere, the melted master alloy ingot was sprayed onto a high-speed rotating copper roller by using a single-roll strip stripping device to obtain an alloy strip with a width of 1 mm and a thickness of 20 μm.

[0043] The phase structure of the alloy strips was detected by X-ray diffractometer (XRD). as attached figure 1 As shown, the XRD results show that the quenched alloy strips have a completely amorphous structure;

[0044] Step 3: Preparation of nanoporous Ru-Fe alloy by electr...

Embodiment 2

[0049] Example 2: The precursor alloy composition is Fe 75 Ru 5 B 20

[0050] The preparation of precursor alloy and nanoporous alloy and the test method of catalytic performance are the same as in Example 1. The protective gas used in steps 1 and 2 is a nitrogen atmosphere, and the prepared amorphous precursor alloy strip has a width of 1 mm and a thickness of 25 μm. The dealloying solution is H + A hydrochloric acid solution with a concentration of 1mol / L has a constant potential of -0.20V and a temperature of 80°C. The d of the nanoporous alloy prepared after dealloying is 6nm, l is 20nm, and the chemical composition of the alloy is Ru 50 Fe 50 . TOF is 31mol H 2 mol -1 Rumin -1 . The specific data are listed in Appendix Table 1.

Embodiment 3

[0051] Embodiment 3: the precursor alloy composition is Fe 65 Ru 15 B 20

[0052] The preparation of precursor alloy and nanoporous alloy and the test method of catalytic performance are the same as in Example 1. The width of the amorphous precursor alloy strip prepared in the second step is 2 mm, and the thickness is 30 μm. The dealloying solution is H + A sulfuric acid solution with a concentration of 0.5mol / L has a constant potential of 0.15V. The d of the nanoporous alloy prepared after dealloying is 5nm, l is 18nm, and the chemical composition of the alloy is Ru 70 Fe 30 . TOF is 40mol H 2 mol -1 Ru min -1 . The specific data are listed in Appendix Table 1.

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Abstract

The invention provides a preparation method of a nano-porous Ru-Fe-Co alloy with high ammonia borane hydrolysis hydrogen production catalytic activity. The preparation method comprises the following steps: preparing a Fe-Co-Ru-B amorphous alloy strip precursor by adopting a single-roller melt-spinning method; and carrying out dealloying on the precursor through a chemical or electrochemical process in an acid environment of 25-80 DEG C to prepare the nano-porous Ru-Fe-Co alloy which is composed of a single close-packed hexagonal phase and has an average pore size of 5-11 nm and a pore wall size of 10-20 nm. The method is simple in process, short in flow, efficient and energy-saving, the pore size of the nano-porous alloy can be regulated and controlled, and the Ru-Fe-Co nano-porous alloy obtained by combining the high specific surface area characteristic of the nano-porous structure and the dual-function effect between Ru-Fe and Co has high ammonia borane hydrolysis hydrogen production catalytic activity, and the catalyst has an application prospect in the field of ammonia borane hydrolysis hydrogen production catalysts.

Description

technical field [0001] The present invention relates to the technical field of new materials, and relates to a method for preparing Ru-based nanoporous alloys, in particular to a method for preparing nanoporous Ru-Fe-Co alloys with high catalytic activity for hydrogen production by hydrolysis of ammonia borane . Background technique [0002] As the demand for alternative energy continues to grow and the problem of environmental pollution is becoming more and more serious, hydrogen energy is regarded as the most ideal green energy in the future energy structure due to its advantages such as wide sources, high energy density, and the combustion product is only water without pollution. . Ammoniaborane (NH 3 BH 3 ) has high hydrogen content and low molecular weight, and is a chemical hydrogen storage and hydrogen production material with broad application prospects. There are three ways to produce hydrogen from ammonia borane: thermal decomposition, alcoholysis and hydrolysi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/10B01J37/00B01J37/34C01B3/06
CPCB01J23/8913B01J23/8906B01J23/892B01J37/0081B01J37/348C01B3/065B01J35/23B01J35/647Y02E60/36
Inventor 李艳辉张伟杨亚苹
Owner DALIAN UNIV OF TECH
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