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Efficient nano-catalyst for hydrogen production by formic acid hydrolysis and preparation method thereof

A technology for hydrogen production and catalysts by hydrolysis, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., which can solve the problems of increased catalytic efficiency, achieve improved dispersion, good hydrogen selectivity, and reduce particles effect of size

Inactive Publication Date: 2019-12-13
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In June 2018, our research group submitted an invention patent application to the National Patent Office, the application number is 201810620905.2, and the name of the invention is a functionalized graphene-supported gold-palladium nanocatalyst and its preparation method and application, in order to find a A simple and effective method to synthesize highly efficient and well-dispersed metal alloy nanocatalysts to improve the efficiency of formic acid dehydrogenation reaction. However, the catalysts prepared by this method still have room for improvement in terms of catalytic efficiency.

Method used

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  • Efficient nano-catalyst for hydrogen production by formic acid hydrolysis and preparation method thereof
  • Efficient nano-catalyst for hydrogen production by formic acid hydrolysis and preparation method thereof
  • Efficient nano-catalyst for hydrogen production by formic acid hydrolysis and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1. Preparation of high-efficiency catalyst:

[0055] Disperse 30mg of GO in 20mL of ultrapure water, sonicate for 15min, add 0.4ml of APTS, stir evenly; take 0.035mmol of HAuCl respectively 4 solution, 0.05mmol of Na 2 PdCl 4 solution and 0.015 mmol of IrCl 3 ·xH 2 O solution was dissolved in APTS+GO aqueous solution, stirred for 3min; at 25°C, 30mg of NaBH was added 4 , the mixed solution was magnetically stirred evenly until no bubbles were generated, and it was completely reduced; after centrifugation and washing with water, Au 0.35 PD 0.5 Ir 0.15 / NH 2 -N-rGO catalyst.

[0056] 2. Sample testing:

[0057] (1) The prepared Au 0.35 PD 0.5 Ir 0.15 / NH 2 - N-rGO catalyst diluted, dropped on carbon support film, dried; ref. figure 1 , the results of transmission electron microscopy (TEM) and particle size analysis showed that Au 0.35 PD 0.5 Ir 0.15 / NH 2 -N-rGO samples have ultra-fine particle size (2.58nm) and uniform dispersion. High-resolution transm...

Embodiment 2

[0063] 1. Preparation of high-efficiency catalyst:

[0064] Disperse 30mg of GO in 20mL of ultrapure water, sonicate for 15min, add 0.4ml of APTS, stir evenly; take 0.03mmol of HAuCl respectively 4 solution, 0.05mmol of Na 2 PdCl 4 solution and 0.02mmol IrCl 3 ·xH 2 O solution was dissolved in APTS+GO aqueous solution, stirred for 3min; at 25°C, 30mg of NaBH was added 4 , the mixed solution was magnetically stirred evenly until no bubbles were generated, and it was completely reduced; after centrifugation and washing with water, Au 0.3 PD 0.5 Ir 0.2 / NH 2 -N-rGO catalyst.

[0065] 2. Sample testing:

[0066] (1) The prepared Au 0.3 PD 0.5 Ir 0.2 / NH 2 - N-rGO catalyst diluted, dropped on carbon support film, dried; ref. Figure 5 , the results of transmission electron microscopy (TEM) showed that Au 0.3 PD 0.5 Ir 0.2 / NH 2 -N-rGO samples have ultrafine particle size and uniform dispersion.

[0067] (2) the prepared Au 0.3 PD 0.5 Ir 0.2 / NH 2 -N-rGO catal...

Embodiment 3

[0072] 1. Preparation of high-efficiency catalyst:

[0073] Disperse 30mg of GO in 20mL of ultrapure water, sonicate for 15min, add 0.4ml of APTS, stir evenly; take 0.0417mol of HAuCl respectively 4 solution, 0.05mol Na 2 PdCl 4 solution and 0.0083mol of IrCl 3 ·xH 2 O solution was dissolved in APTS+GO aqueous solution, stirred for 3min; at 25°C, 30mg of NaBH was added 4 , the mixed solution was magnetically stirred evenly until no bubbles were generated, and it was completely reduced; after centrifugation and washing with water, Au 0.5 PD 0.6 Ir 0.1 / NH 2 -N-rGO catalyst.

[0074] 2. Sample testing:

[0075] (1) The prepared Au 0.5 PD 0.6 Ir 0.1 / NH 2 - N-rGO catalyst diluted, dropped on carbon support film, dried; ref. Figure 9 , the results of transmission electron microscopy (TEM) showed that Au 0.5 PD 0.6 Ir 0.1 / NH 2 -N-rGO samples have ultrafine particle size and uniform dispersion.

[0076] (2) the prepared Au 0.5 PD 0.6 Ir 0.1 / NH 2 -N-rGO cata...

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Abstract

The invention relates to the technical field of catalyst preparation, in particular to an efficient nano-catalyst for hydrogen production by formic acid hydrolysis. The catalyst is an AuPdIr / NH2-N-rGOefficient catalyst obtained by doping gold palladium iridium nanoparticles on a graphene carrier NH2-N-rGO modified with -NH2-N bifunctional groups. The catalyst is prepared by a one-step rapid reduction method at room temperature, is short in synthesis time and simple and convenient to operate, and still has extremely high catalytic activity, 100% formic acid conversion rate, 100% hydrogen selectivity and relatively good cycling stability in absence of any additive, and can realize complete decomposition of formic acid within 0.75 min. The initial TOF value of the AuPdIr / NH2-N-rGO is 10224.9h<-1> and is far higher than the TOF value 4639.2 h <-1 > of the AuPdIr / NH2-N-rGO which is reported in the prior art.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a high-efficiency nanometer catalyst for hydrogen production by hydrolysis of formic acid and a preparation method thereof. Background technique [0002] Hydrogen is considered to be a very potential energy carrier for transportation / mobility applications and will play an important role in the sustainable development of future renewable energy technologies. However, the extremely low critical point and very low density of hydrogen make it difficult to break through the effective storage of hydrogen, which brings great inconvenience to the application of hydrogen-based fuel cells, so finding alternative materials is the current research focus. At present, chemical hydrogen storage materials, such as formic acid, have received extensive attention due to various advantageous properties at room temperature. Formic acid (HC00H, FA) is the main product of biological proce...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/12B01J37/34B01J37/16C01B3/22B82Y30/00B82Y40/00
CPCB01J27/24B01J37/12B01J37/16B01J37/343B82Y30/00B82Y40/00C01B3/22C01B2203/0277C01B2203/1064C01B2203/1082
Inventor 鄢俊敏刘冬雪康霞张野段焱鑫姚佳欣李弘睿高蕊俞珍王达年蒋青
Owner JILIN UNIV
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