Iridium-based multi-component nano-porous catalyst as well as preparation method and application thereof

A multi-component composite and nanoporous technology, applied in nanotechnology, electrolytic components, electrolytic process, etc., can solve the problems of low anode electrolysis efficiency, large amount of precious metals used in the catalyst, and high cost, and achieve multiple surface active sites and low overpotential , the effect of reducing the dosage

Active Publication Date: 2022-05-27
CHINA THREE GORGES CORPORATION
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  • Description
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Problems solved by technology

[0004] Therefore, the technical problem to be solved in the present invention is to overcome the defects of low anode electrolysis efficiency, large amount of noble metal in the catalyst, and high cost of the electrolytic water hydrogen production catalyst in the prior art, thereby providing an iridium-based multi-component composite nanoporous catalyst and its preparation method

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  • Iridium-based multi-component nano-porous catalyst as well as preparation method and application thereof
  • Iridium-based multi-component nano-porous catalyst as well as preparation method and application thereof
  • Iridium-based multi-component nano-porous catalyst as well as preparation method and application thereof

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preparation example Construction

[0061] The present invention provides a method for preparing a iridium-based multi-composite nanoporous catalyst, comprising the following steps:

[0062] 1) Weigh iridium acetylacetonate (Ir(acac)) 3 ), mixed with 10 ~ 15 ml of oleylamine ultrasound, ultrasonic frequency of 20 ~ 40KHz, ultrasound time of 5 ~ 10 minutes, to obtain liquid 1, liquid 1 in Ir (acac) 3 The content is 4 to 7mg / ml; called methane tert-butylamine complex (BTB), mixed with 2 ~ 4ml of oleylamine, to give liquid 2, liquid 2 BTB content of 50 ~ 100mg / ml. Ir(acac) 3 The mass ratio of BTB is 1: (2 to 5). In a protective gas atmosphere, the liquid 1 is raised to 60 ° C ~ 90 ° C in a three-mouth flask, and the protective gas is nitrogen, argon or helium, and the temperature is maintained for 5 to 10 minutes to remove the low boiling point substance. Continue to heat the liquid 1 to 220 °C ~ 250 °C, after injecting liquid 2 into a three-mouth flask, continue to maintain a constant temperature of 0.5 ~ 1.5h at 22...

Embodiment 1

[0067] The present embodiment provides a method for preparing an iridium-based multi-component composite nanoporous catalyst, comprising the following steps:

[0068] (01) Dissolve 70mg of acetylacetone iridium in 10ml of oleylamine, sonicate evenly disperse, ultrasonic frequency 40kHz, ultrasound time 5 min, to obtain a light yellow solution.

[0069] (02) Weigh 200mg of methylborane tert-butylamine complex (BTB) dissolved in 4ml of oleylamine, ultrasonically dispersed uniformly to obtain a colorless solution.

[0070] (03) In a nitrogen atmosphere, transfer the light yellow solution of step (01) to a three-mouth flask, heat up to 60 °C, vacuum for 10 min to remove the low boiling point substance, and then heat up to 240 °C.

[0071] (04) After heating up to 240 °C in step (03), the colorless solution of step (02) is quickly injected into a three-mouth flask with a syringe and maintained at 240 °C for 1 h. In addition to evacuation, the gas atmosphere is nitrogen, and the gas vel...

Embodiment 2

[0080] The present embodiment provides a method for preparing an iridium-based multi-component composite nanoporous catalyst, comprising the following steps:

[0081] (01) Dissolve 60mg of acetylacetone iridium in 12ml of oleylamine, ultrasonically disperse evenly, ultrasonic frequency 30kHz, ultrasound time 8 min, to obtain a light yellow solution.

[0082] (02) Weigh 225mg of meborane tert-butylamine complex (BTB) dissolved in 3ml of oleylamine, ultrasonically dispersed uniformly to obtain a colorless solution.

[0083] (03) In a nitrogen atmosphere, transfer the light yellow solution of step (01) to a three-mouth flask, heat up to 80 °C, vacuum for 8 min to remove the low boiling point substance, and then heat up to 230 °C.

[0084] (04) After heating up to 230 °C in step (03), the colorless solution of step (02) is quickly injected into a three-mouth flask with a syringe and maintained at 230 °C for 0.5 h. In addition to evacuation, the gas atmosphere is nitrogen, and the gas ...

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Abstract

The invention provides an iridium-based multi-component nano-porous catalyst as well as a preparation method and application thereof, belongs to the technical field of catalytic materials, and solves the defects of low anode electrolysis efficiency, large use amount of noble metal in the catalyst and relatively high cost of a water electrolysis hydrogen production catalyst in the prior art. The iridium-based multi-element composite nano-porous catalyst comprises iridium and/or iridium oxide and further comprises an oxide compounded with the iridium and/or iridium oxide, the oxide has conductivity, and the dielectric constant of the oxide is smaller than 80 F/m. The catalyst provided by the invention has low overpotential and high mass activity, the use amount of precious metal iridium can be reduced, and the energy consumed by oxygen evolution reaction is less.

Description

Technical field [0001] The present invention belongs to the field of catalytic materials technology, specifically relates to a iridium-based multi-composite nanoporous catalyst and preparation method and application thereof. Background [0002] Energy and environmental issues are two major issues facing human development today. The current fossil fuel energy mix faces a double crisis of resource shortage and environmental sustainability, and oil and coal reserves have been a concern for many years, and the storage capacity for long-term use in the future is very low. With the improvement of people's living standards, and because the use of fossil energy poses environmental threats, damages the human living environment and personal health, and is inconsistent with the sustainable development strategy, people have begun to actively pay attention to environmental protection, energy use and the development of new clean energy, and the problem of developing new available clean energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/075C25B11/081C25B11/091B22F9/24B82Y40/00
CPCC25B1/04C25B11/075C25B11/081C25B11/091B22F9/24B82Y40/00Y02E60/36
Inventor 王新宇王勇胜尹立坤朱威
Owner CHINA THREE GORGES CORPORATION
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