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A kind of oxygen evolution Fe-doped cobalt diselenide@n-ct composite catalyst and its preparation method and application

A composite catalyst and catalyst technology, applied in the field of electrocatalysis, can solve the problems of low activity and electrical conductivity, and achieve the effects of enhanced catalytic performance, high catalytic activity and stability, and high catalytic activity

Active Publication Date: 2019-10-22
CENT SOUTH UNIV
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Problems solved by technology

[0003] For a single CoSe in the prior art 2 As an OER electrocatalyst, there are defects in activity and low conductivity. One of the purposes of the present invention is to provide a catalyst with high catalytic activity and good stability, and its comprehensive catalytic performance is close to or even exceeds that of commercial precious metal RuO. 2 FCS@N-CT Composite Catalyst

Method used

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  • A kind of oxygen evolution Fe-doped cobalt diselenide@n-ct composite catalyst and its preparation method and application
  • A kind of oxygen evolution Fe-doped cobalt diselenide@n-ct composite catalyst and its preparation method and application
  • A kind of oxygen evolution Fe-doped cobalt diselenide@n-ct composite catalyst and its preparation method and application

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Embodiment 1

[0028] Preparation of Co@N-CT (denoted as C@N-CT):

[0029] A synthetic method using two-step heat treatment, the specific process is as follows: 0.5g Co(Ac) 2 4H 2 O and 10 g of urea were dissolved in 5 mL of deionized water at 80 °C, and evaporated under stirring for about 40 min; then the solid mixture was transferred to a 100 mL porcelain crucible, and the temperature was raised to 450 °C at a heating rate of 5 °C / min in a muffle furnace. ℃, keep warm for 1h, and cool naturally; grind the product evenly and put it in high-purity N 2 Heated to 800°C at a rate of 10°C / min in the atmosphere, kept for 1 hour, and obtained after natural cooling.

[0030] Preparation of Fe-doped Co nanoparticles coated with N-doped carbon nanotubes (referred to as FC@N-CT):

[0031] 0.45g Co(Ac) 2 4H 2 O, 0.081g Fe(NO 3 ) 3 9H 2 O and 10 g of urea were dissolved in 5 mL of deionized water at 80 °C, and the remaining steps were the same as those for the synthesis of C@N-CT above.

[0032...

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Abstract

The invention discloses an oxygen evolution Fe-doped cobalt diselenide@N-CT compound catalyst and a preparation method and application thereof. The compound catalyst comprises Fe-doped CoSe2 nano particles coated by an N-doped carbon nanotube. The preparation method includes: evaporating and drying the solution of cobalt acetate, iron nitrate and urea, and performing high-temperature treatment to obtain the Fe-doped CoSe2 nano particles coated by the N-doped carbon nanotube; mixing the Fe-doped CoSe2 nano particles coated by the N-doped carbon nanotube with Se powder to obtain a mixture, and performing selenylation on the mixture under protective atmosphere to obtain the compound catalyst. The preparation method has the advantages that the method is simple, low in cost and beneficial to industrial production; the prepared Fe-doped CoSe2@N-CT (recorded as FCS@N-CT) compound catalyst is applicable to electrocatalytic water decomposition, and the compound catalyst is good in comprehensive performance as compared with a commercial RuO2 catalyst and is promising in application prospect.

Description

technical field [0001] The invention relates to an oxygen evolution (OER) catalyst and its preparation and application method, in particular to an oxygen evolution N-doped carbon nanotube coated Fe-doped CoSe for electrocatalytic water splitting 2 Nanoparticle composite catalyst (Fe-doped CoSe 2 @N-CT, denoted as FCS@N-CT) and its preparation method belong to the field of electrocatalysis technology. Background technique [0002] Energy is one of the three pillars of the development of modern society. With the development of modern society, the depletion of non-renewable fossil energy, hydrogen (H 2 ), as a renewable new energy source, has attracted extensive attention from researchers due to its advantages such as high energy density, wide range of sources, and environmental friendliness. At present, the industry generally uses natural gas or water gas to produce hydrogen, but electrolyzed water is not used because of high energy consumption. However, more than 71% of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J31/18C25B1/04C25B11/06
CPCB01J27/24B01J31/1805B01J35/0033C25B1/04C25B11/04Y02E60/36
Inventor 钱东李军闵紫嫣刘贝贝刘桂雨
Owner CENT SOUTH UNIV
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