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A low-temperature solid phase interface doped cob catalyst and its preparation method and application

A solid-phase interface, doped technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of easy agglomeration and low hydrogen production efficiency , to achieve the effect of overcoming easy agglomeration, improving specific surface area and uniform particle distribution

Active Publication Date: 2022-04-22
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the problem that existing cobalt-based catalysts are easy to agglomerate, be degraded or even etched during the reaction process, resulting in low hydrogen production efficiency, the present invention provides a low-temperature solid-phase interface-doped CoB catalyst and its preparation method and application. The preparation method of the present invention is simple, and the hydrogen production rate of the obtained catalyst applied in the sodium borohydride hydrolysis reaction is relatively fast

Method used

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  • A low-temperature solid phase interface doped cob catalyst and its preparation method and application
  • A low-temperature solid phase interface doped cob catalyst and its preparation method and application
  • A low-temperature solid phase interface doped cob catalyst and its preparation method and application

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Embodiment 1

[0027] 0.2379g (0.001mol) CoCl 2 ·6H 2 O and 0.0217g (0.00005mol) Ce(NO 3 ) 3 ·6H 2 After O was dissolved in 10ml of distilled water under ultrasonic conditions, it was placed in a flat dish with a diameter of 60mm and frozen into a solid; 4 The solid powder is evenly placed on the ice surface to undergo a solid-solid interface reaction; after 2 hours, a black suspension is obtained, which is filtered, washed with ethanol and water alternately three times, and then placed in a vacuum oven at 60°C. After 12 hours, the CoB / Ce catalyst can be obtained .

[0028] NaBH 4 Hydrogen production experiment in aqueous solution, add 10mg CoB / Ce catalyst to 10ml 1wt% NaBH in a constant temperature water bath at 30°C 4 and 1wt% NaOH aqueous solution for hydrogen production rate test. The hydrogen production rate is 5.57L min -1 g 催化剂 -1 .

Embodiment 2

[0030] 0.2379g (0.001mol) CoCl 2 ·6H 2 O and 0.0434g (0.0001mol) Ce(NO 3 ) 3 ·6H 2 After O was dissolved in 10ml of distilled water under ultrasonic conditions, it was placed in a flat dish with a diameter of 60mm and frozen into a solid; 4 The solid powder is evenly placed on the ice surface to undergo a solid-solid interface reaction; after 2 hours, a black suspension is obtained, which is filtered, washed with ethanol and water alternately three times, and then placed in a vacuum oven at 60°C. After 12 hours, the CoB / Ce catalyst can be obtained .

[0031] NaBH 4 For the hydrogen production experiment in aqueous solution, add 10mg of CoB / Ce catalyst to 10ml of 1wt% NaBH in a constant temperature water bath at 30°C 4 and 1wt% NaOH aqueous solution for hydrogen production rate test. The hydrogen production rate is 4.62L min - 1 g 催化剂 -1 .

Embodiment 3

[0033] 0.2379g (0.001mol) CoCl 2 ·6H 2 O and 0.0217g (0.0001mol) Ce(NO 3 ) 3 ·6H 2 After O was dissolved in 10ml of distilled water under ultrasonic conditions, it was placed in a flat dish with a diameter of 60mm and frozen into a solid at low temperature; 0.3783g (0.01mol) NaBH 4 The solid powder is evenly placed on the ice surface to undergo a solid-solid interface reaction; after 2 hours, a black suspension is obtained, which is filtered by suction, washed alternately with ethanol and water three times, and then placed in a vacuum oven at 100°C. After 12 hours, the CoB / Ce catalyst can be obtained .

[0034] NaBH 4 For the hydrogen production experiment in aqueous solution, add 10mg of CoB / Ce catalyst to 10ml of 5wt% NaBH in a constant temperature water bath at 30°C 4 and 5wt% NaOH aqueous solution for hydrogen production rate test. The hydrogen production rate is 6.12L min - 1 g 催化剂 -1 .

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Abstract

A low-temperature solid-phase interface doped CoB catalyst, which is prepared as follows: cobalt salt and doped metal salt are dissolved in water, frozen into a solid, and then sodium borohydride powder is evenly placed in the freezer at 1-5°C The obtained solid surface undergoes a reduction reaction to obtain a black suspension, which is suction filtered, washed, and vacuum-dried to obtain a doped CoB catalyst; the present invention uses a solid phase interface and a low temperature environment of 1 to 5°C for the reaction, which reduces the reduction of sodium borohydride. rate, and then overcome the problem that the cobalt-based catalyst is easy to agglomerate, be degraded or even etched during the reaction process, resulting in low hydrogen production efficiency; the purpose of doping metal salt in the present invention is to prevent CoB from agglomerating, make the particle distribution uniform, and improve the ratio Surface area, thereby further increasing the hydrogen production rate of sodium borohydride hydrolysis.

Description

(1) Technical field [0001] The invention belongs to the technical field of preparation of functional materials, and relates to a CoB catalyst and its preparation method and application, in particular to a low-temperature solid-phase interface doped CoB catalyst and its preparation method, and its use in catalyzing the hydrolysis of sodium borohydride to produce hydrogen application. (2) Background technology [0002] In recent years, the rapid consumption of natural fossil fuels is an important cause of global warming and environmental pollution, and it is imminent to seek clean and sustainable energy sources. Hydrogen is regarded as a new generation of fuel due to its high energy density, zero pollution and easy availability. In the current research on hydrogen production and hydrogen storage methods, chemical hydrides have become a research hotspot due to their advantages such as a mild hydrogen storage environment and a safe and easy-to-control hydrogen production proces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J23/75B01J35/02B01J35/10C01B3/04B01J35/00
CPCB01J23/83B01J23/75C01B3/042C01B2203/0277B01J35/50B01J35/61Y02E60/36
Inventor 冯勇戴舒洁江华生季山王鹏
Owner JIAXING UNIV