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Binary and ternary transition metal hydrides as well as preparation method and application thereof

A transition metal and hydride technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as low conductivity of phosphides and poor catalyst stability

Inactive Publication Date: 2017-12-29
WUHAN HYNERTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Rodriguez's research group on Ni 2 The electrocatalytic hydrogen evolution activity of P was calculated by DFT theory, and it was found that Ni 2 The (001) crystal surface of P has a certain hydrogen adsorption capacity, and has the potential to replace platinum as an efficient hydrogen evolution catalyst. However, this type of phosphide has extremely low conductivity, and carbon black needs to be added as a conductor to transfer electrons and run for a long time. lead to poor catalyst stability

Method used

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  • Binary and ternary transition metal hydrides as well as preparation method and application thereof
  • Binary and ternary transition metal hydrides as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Weigh 10 g of cobalt nitrate and 10 g of nickel nitrate, then stir and mix with 40 g of polyethylene glycol, and stir at 60° C. for 48 h; after stirring, add dropwise dilute nitric acid with a mass ratio of 10% to adjust the pH of the solution to 2;

[0025] (2) Put the mixed solution into a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 200°C for 48 hours;

[0026] (3) After the hydrothermal reaction is completed, suction filter and wash the reactant with ultrapure water and ethanol to neutrality, and fully dry at 60°C;

[0027] (4) calcining the dry matter at high temperature for 2 hours to obtain a double metal oxide product;

[0028] (5) The product is loaded into a high-temperature and high-pressure reactor, 150° C., 3 MPa hydrogen pressure, and heated for 2 hours to obtain H 0.3 co 0.5 Ni 0.5 o 3 .

Embodiment 2

[0030] 1.H 0.3 Fe 0.33 co 0.33 Ni 0.33 o 3 preparation of

[0031] (1) Weigh 10g of cobalt nitrate, 10g of nickel nitrate and 13.2g of iron nitrate, then stir and mix with polyethylene glycol, and stir at 60°C for 48h; after stirring, add dropwise dilute nitric acid with a mass ratio of 10% to adjust the pH of the solution to 2;

[0032] (2) Put the mixed solution into a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 200°C for 48 hours;

[0033] (3) After the hydrothermal reaction is completed, suction filter and wash the reactant with ultrapure water and ethanol to neutrality, and fully dry at 60°C;

[0034] (4) calcining the dry matter at high temperature for 2 hours to obtain a trimetallic oxide product;

[0035] (5) The product is loaded into a high-temperature and high-pressure reactor, 150° C., 3 MPa hydrogen pressure, and heated for 2 hours to obtain H 0.3 Fe 0.33 co 0.33 Ni 0.33 o 3 .

[0036] 2. H 0.3 Fe 0.33 co 0.33 Ni 0.33 o 3 ...

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Abstract

The invention discloses binary and ternary transition metal hydrides, a preparation method and an application of the binary and ternary transition metal hydrides as an efficient and stable electro-catalytic hydrogen evolution catalyst. The catalyst has the molecular formula being HxMaRbYcO3, wherein M, R and Y are two or three different transition metals, the value of x ranges from 0.01 to 1, and the sum of a, b and c is equal to 1. M, R and Y are any two or three elements of scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, niobium, molybdenum, rhodium, osmium, tungsten, tantalum and iridium. HxMaRbYcO3 as a water electrolysis catalyst has electrochemical performance in an acidic electrolyte equivalent to the performance of a commercial carbon-supported platinum catalyst, has very high stability and is prepared with a simple preparation process and easy to amplify. Therefore, HxMaRbYcO3 can serve as a substitute of the carbon-supported platinum catalyst, and the hydrogen production cost is effectively reduced.

Description

technical field [0001] The invention belongs to the field of catalysts, in particular to binary and ternary transition metal hydrides and their preparation methods and their application in electrocatalytic hydrogen evolution. Background technique [0002] Hydrogen energy is the most ideal green energy in the 21st century, with the characteristics of cleanness, high efficiency and high quality. At present, there are three main technologies for the preparation of hydrogen energy, namely hydrogen production from fossil fuels, hydrogen production from water splitting and hydrogen production from biomass raw materials. Among them, the technology of hydrogen production by electrolysis of water has become the research focus of countries all over the world because of its technical characteristics of simple process, no pollution, high product purity and strong applicability. Using renewable energy water as the most basic raw material to produce hydrogen by electrolysis of water, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J23/755B01J35/33Y02E60/36
Inventor 程寒松杨泽惠杨明
Owner WUHAN HYNERTECH CO LTD
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