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Preparation method for efficiently plaining noble metal and improving electro-catalytic performance thereof

A noble metal and electrocatalytic technology, which is applied in the field of nanomaterials and electrochemical catalysis, can solve the problems of violating the development trend of materialization and the inability to realize the amount of precious metal platinum, so as to improve catalytic performance and catalytic efficiency, facilitate dispersion and adhesion, and reduce effect of size

Active Publication Date: 2018-01-09
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although some effects are obvious, the amount of precious metal platinum cannot be effectively reduced only through the adjustment of the morphology, and the introduction of other alloying elements not only causes the dependence on alloying elements, but also violates the development trend of plain materials.

Method used

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  • Preparation method for efficiently plaining noble metal and improving electro-catalytic performance thereof
  • Preparation method for efficiently plaining noble metal and improving electro-catalytic performance thereof
  • Preparation method for efficiently plaining noble metal and improving electro-catalytic performance thereof

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Experimental program
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Effect test

Embodiment 1

[0035] Platinum acetylacetonate (Pt(acac) 2 ), nickel acetylacetonate (Ni(acac) 2 ), ascorbic acid, N'N-dimethylformamide (DMF), and porous carbon as raw materials, the molar ratio of nickel to platinum is 1:4, and the amount of carbon added is 10wt. % calculation, excess ascorbic acid and DMF, and then use ultrasound to disperse for 0.5 hours, then carry out magnetic stirring treatment for 5 hours, the amount of DMF is 20mL, after the dispersion treatment, the mixed solution is placed in a 40mL reactor, and an oven is used at 2°C / min The heating rate was heated to 170°C, and the temperature was kept for 10 hours. After the heat preservation was completed, it was naturally cooled to room temperature, and then the product was collected by centrifugation at 5000 rpm for 15 minutes. The mixed solution of 4:1:1 was washed three times with liquid, and vacuum-dried at 50°C to obtain a powdered platinum-nickel alloy.

[0036] The obtained powdered platinum-nickel alloy was placed i...

Embodiment 2

[0039] Platinum acetylacetonate (Pt(acac) 2 ), cobalt acetylacetonate (Co(acac) 2 ), ascorbic acid, N'N-dimethylformamide (DMF), and porous carbon as raw materials, the molar ratio of cobalt to platinum is 1:3.5, and the amount of carbon added is 20wt. % calculation, excess ascorbic acid and DMF, and then use ultrasound to disperse for 1 hour, then carry out magnetic stirring treatment for 8 hours, the amount of DMF is 20mL, after the dispersion treatment, the mixed solution is placed in a 40mL reaction kettle, and an oven is used. The heating rate was heated to 200°C, and the temperature was kept for 7 hours. After the heat preservation was completed, it was naturally cooled to room temperature, and then the product was collected by centrifugation at 8000 rpm for 10 minutes. The mixed solution of 5:1:1 was washed 4 times, and vacuum-dried at 60° C. to obtain a powdered platinum-cobalt alloy.

[0040] The obtained powdery platinum-cobalt alloy was placed in a mixed solution ...

Embodiment 3

[0043] Platinum acetylacetonate (Pt(acac) 2 ), iron acetylacetonate (Fe(acac) 3 ), ascorbic acid, N'N-dimethylformamide (DMF), and porous carbon were mixed as raw materials, the molar ratio of iron to platinum was 1:3, and the amount of carbon added was 30wt. % calculation, excess ascorbic acid and DMF, and then use ultrasound to disperse for 2 hours, then carry out magnetic stirring treatment for 10 hours, the amount of DMF is 20mL, after the dispersion treatment, the mixed solution is placed in a 40mL reactor, heated to 220 °C in an oven, and kept For 4 hours, the heating rate was 8°C / min. After the heat preservation was completed, it was naturally cooled to room temperature, and then the product was collected by centrifugation at 10,000 rpm for 5 minutes. The mixed solution of 4:1:1 was washed three times, and vacuum-dried at 70°C to obtain a powdered platinum-iron alloy.

[0044] The obtained powdered platinum-iron alloy was placed in a mixed solution of 35% formic acid ...

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Abstract

The invention belongs to the technical field of nano materials and electro-chemical catalysis, and particularly relates to a preparation method for efficiently plaining a noble metal and improving electro-catalytic performance thereof. The preparation method comprises the following steps: uniformly mixing raw materials in a certain element molar ratio, placing into a closed reaction kettle to perform in-situ reduction and loading growth reaction on platinum-based alloy to obtain platinum-based alloy nanoparticles which are uniformly loaded on porous carbon; plaining platinum alloy nano-crystalto obtain a platinum nano-crystalline catalyst which only contains platinum element and is rich in hole and lattice imperfection. The plained platinum nano-particles have the catalytic effect remarkably superior to that of a carbon-loaded platinum catalyst in current commercial application. The nano-crystalline noble metal platinum has the advantages of simple process steps, short flow, adjustable platinum nano-crystalline appearance structure and the like, is easy for large-scale production, and has an important value in the fields of industrial catalyst or other subjects.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials and electrochemical catalysis, and in particular relates to a preparation method for effectively oxidizing noble metals and improving their electrocatalytic performance. Background technique [0002] Material priming is a new concept proposed under the comprehensive research and analysis of the development trend of material science and technology in recent years. Over the years, the development of materials, especially metal materials, has relied on alloying to adjust material properties, but the development potential of alloying in many systems has been exhausted, and alloying has also increased the dependence on natural resources. Material priming refers to the manufacture of "plain" materials with little alloying through cross-scale construction and organizational structure regulation, which greatly improves the comprehensive performance of materials, and achieves the ultimate high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42C25B11/08
Inventor 梁汉璞王西龙陈国栋杜健
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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