Small-molecular alcohol oxidation electro-catalysis material and preparation method and application therefor

A technology of small molecular alcohol and catalytic material, applied in the field of electrocatalysis, can solve the problems of limited anti-poisoning ability of PtRu alloy, hinder the promotion of PtRu alloy catalyst, rare Ru, etc., and achieve good anti-carbon monoxide poisoning ability, good methanol oxidation catalytic activity, The effect of a reasonable composition of matter

Active Publication Date: 2016-03-16
SUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If you want to take advantage of the oxygen affinity of the Ru surface, you can interact with CO adsorbed on the Pt surface to a certain extent, thereby reactivating the Pt surface; but even so, the anti-poisoning ability of the PtRu alloy is still very limited, and the effect is not good. rarer, more expensive
These factors jointly hinder the further promotion of PtRu alloy catalysts in small molecule alcohol fuel cells

Method used

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  • Small-molecular alcohol oxidation electro-catalysis material and preparation method and application therefor
  • Small-molecular alcohol oxidation electro-catalysis material and preparation method and application therefor
  • Small-molecular alcohol oxidation electro-catalysis material and preparation method and application therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 Pt / Ni(OH) 2 / rGO ternary system catalyst

[0035] Apply the improved hummers method to prepare low-oxidation graphene oxide, specifically, add 30-40 g of sodium chloride to 1 g of graphite flakes, and grind them thoroughly. Add about 1L of water to dissolve and filter to obtain a black solid, which is dried at 100°C to dry the water. After drying, the powder solid was transferred to a three-necked flask, 23 mL of sulfuric acid was added, and magnetically stirred for 24 hours. After stirring for 24 hours, add 0.11 g of sodium nitrate and 0.5 g of potassium permanganate, and stir in an oil bath at 40° C. for 30 minutes. Add 1 ml of deionized water every 2 minutes, add five times, add 5 ml, 40 ml, 140 ml of deionized water successively every 5 minutes, and remove the oil bath. Centrifuge at 5000 rpm to obtain a solid, then wash the solid with 240 ml of 5% hydrochloric acid solution, and then wash it with deionized water to pH 4-6. Use a UV-visible spectroph...

Embodiment 2

[0044] Example 2 Pd / Ni(OH) 2 / Carbon nanotube ternary system catalyst

[0045] Dissolve 12 mg of carbon dioxide tube solid in 16 ml of N,N-dimethylformamide, add 2.5 ml, 1.25 ml, 0.833 ml, 0.5 ml, 0.313 ml, 0.25 ml of nickel acetate in different proportions, and then Add 0.2 ml of concentrated ammonia water, seal, heat in an oil bath at 90°C for 12 hours, wash with deionized water and centrifuge three times at 8,000 rpm to obtain a black solid, which is Pd / Ni(OH) 2 / Ni(OH) of carbon nanotube three-way catalyst 2 / Carbon oxide substrate, Ni(OH) respectively 2 / Carbon nanotube-1, Ni(OH) 2 / Carbon nanotube-2, Ni(OH) 2 / Carbon nanotube-3, Ni(OH) 2 / Carbon nanotube-4, Ni(OH) 2 / carbon nanotube-5.

[0046] The black solid Ni(OH) obtained above 2 Dissolve carbon nanotubes in 6 ml of ethylene glycol solution, mix well, add 20 ml of deionized water, 1.5 ml of 0.05 moles per liter of ammonium chloropalladate ethylene glycol solution, add 0.5mLPMAA, and ultrasonic for 2 minut...

Embodiment 3

[0047] Example 3 Pt / Co(OH) 2 / rGO ternary system catalyst

[0048] Dissolve 6 mg of the graphene oxide solid prepared in Example 1 in 8 ml of N,N-dimethylformamide, and add 1.25 ml, 0.625 ml, 0.415 ml, and 0.313 ml of 0.2 mol / L acetic acid in different proportions Cobalt aqueous solution, add 0.2mL concentrated ammonia water, seal, heat in an oil bath at 85°C for 12 hours, cool to room temperature, wash with deionized water, and centrifuge at 8000rpm three times to obtain a black solid, which is Co(OH) 2 / GO base.

[0049] The above obtained Co(OH) 2 / GO was dissolved in 6 ml of ethylene glycol solution, mixed evenly, respectively added 6 ml of deionized water, 1.2 ml of 0.077 moles per liter of chloroplatinic acid ethylene glycol solution, added 0.24 mL PMAA, ultrasonicated for 2 minutes, mixed evenly, 800W microwave heating for 120 seconds; centrifuge at 12000rpm, three times for 30 minutes, wash with deionized water, then centrifuge at 12000rpm, three times for 10 minute...

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Abstract

The invention discloses a small-molecular alcohol oxidation electro-catalysis material and a preparation method and an application therefor. The small-molecular alcohol oxidation electro-catalysis material is a noble metal-metal hydroxide-carbon material ternary composite system and prepared by two steps; firstly, a carbon material and a metal salt solution are used as the raw materials to be subjected to a first time of reaction to grow metal hydroxide particles on the surface of the carbon material; then, the noble metal salt is taken as the raw material to be subjected to a second time of reaction to grow noble metal particles on the surface of the carbon material loaded with the metal hydroxide particles to obtain the noble metal-metal hydroxide-carbon material ternary composite system. When the small-molecular alcohol oxidation electro-catalysis material is used as the positive electrode catalyst of a direct alcohol fuel cell, efficient and stable alcohol electro-catalysis oxidation is realized, and an outstanding anti-CO-poisoning capability is achieved as well; and in addition, the small-molecular alcohol oxidation electro-catalysis material is lower in cost compared with the commercialized Pt-Ru alloy catalyst.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis, and in particular relates to a small molecule alcohol oxidation electrocatalytic material based on a noble metal-metal hydroxide-carbon material ternary composite system and a preparation method and application thereof. Background technique [0002] The use of small molecule alcohols as liquid fuels in direct alcohol fuel cells has the following characteristics: Compared with hydrogen, alcohols have a higher volumetric energy density; small molecule alcohols are relatively easy to produce; because small molecule alcohols are liquid fuels, it is easier to storage and transport. Currently, metallic platinum (Pt) is the most common electrocatalyst for alcohol oxidation. The specific process of small molecule alcohol oxidation on its surface is as follows: first, alcohol is adsorbed on the surface of the catalyst, and these adsorbed alcohol molecules lose electrons on the surface of the cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M4/92B82Y30/00
CPCB82Y30/00H01M4/8825H01M4/9016H01M4/926Y02E60/50
Inventor 李彦光黄文静
Owner SUZHOU UNIV
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