Preparation method of Ru nano-material with different morphologies and application of preparation method
A technology of nanomaterials and morphology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., to achieve the effects of simple and convenient preparation process, good stability, excellent OER performance and stability
Active Publication Date: 2019-12-20
BEIJING UNIV OF CHEM TECH
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Problems solved by technology
However, so far, no one has synthesized different Ru nanomaterials by adjusting the atmosphere. The present invention provides a simple in-situ control synthesis atmosphere to prepare a series of Ru nanomaterials with different shapes, namely nanowires, nano The shapes of flakes and nanoparticles are applied to OER reactions
Method used
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Embodiment 1
[0039] A preparation method for synthesizing Ru nanomaterials with different shapes by controlling the synthesis atmosphere in situ, and the Ru nanomaterials have the shapes of Ru nanowires, nano flakes and nanoparticles.
[0040] The methods include:
[0041] (1) Ruthenium chloride is mixed in ethylene glycol, fully stirred;
[0042] (2) Then feed 0.6Mpa of hydrogen, react at 180°C for 3 hours, cool, wash, and dry to obtain Ru nanowires;
[0043] (3) Mix the obtained catalyst and carbon black evenly, after ultrasonic uniformity, dry, and then heat-treat at 200°C for 1 hour to obtain Ru NWs / C-H 2 .
Embodiment 2
[0045] The rest is the same as in Example 1, except that the reaction atmosphere is changed to oxygen to obtain Ru nano flakes.
Embodiment 3
[0047] The rest is the same as in Example 1, except that the reaction atmosphere is changed to air to obtain Ru nanoparticles.
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The invention provides a preparation method of a Ru nano-material with different morphologies and application of the preparation method. The preparation method of the Ru nano-material with the different morphologies comprises the steps that (1) a Ru source is added into ethylene glycol for sufficient and uniform stirring; (2) then different gas is introduced, and reaction, cooling, washing and drying are carried out under 120-200 DEG C; and (3) an obtained catalyst and carbon black are mixed uniformly, drying is carried out after uniform ultrasound, then thermal treatment is carried out to obtain Ru / C, and the Ru / C is used for an electrochemical performance test. Ru is uniformly distributed on the carbon black, and Ru presents a shape of a nanowire, a nano sheet clip and nano-particles; the OER performance of the Ru nanowire, the nano sheet clip and the nano-particles greatly exceeds industrial RuO2 and industrial IrO2 catalysts under the acidic condition, and voltages corresponding tothe electric current density of 10mA / cm<2> of the OER performance of the Ru nanowire, the nano sheet clip and the nano-particles separately reach 224mV, 286mV and 252mV (vs.RHE) under the acidic condition. The catalyst has good stability under the acidic condition. The preparation method of the Ru nano-material with the different morphologies is simple, the catalyst has higher activity and stability, and a better application prospect is achieved on the aspect of electrolysed water.
Description
technical field [0001] The invention relates to the preparation and application of Ru nanomaterials with different shapes, in particular to a method for preparing Ru nanomaterials with different shapes by in-situ regulation and control of synthesis atmosphere and its application, which belongs to the technical field of catalyst synthesis. Background technique [0002] With the reduction of traditional fossil energy and the aggravation of environmental pollution, people are very urgent to develop sustainable and pollution-free new energy. Among them, hydrogen energy is considered to be one of the most promising new energy sources due to its high energy density and the by-product of the reaction being water. However, the main methods of hydrogen production in industry are methane cracking, water gas shift and electrolysis of water. Among them, methane cracking and water gas shift reaction produce hydrogen with an efficiency of more than 95%, but the raw materials of these met...
Claims
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IPC IPC(8): B01J23/46B01J37/10C25B1/04C25B11/06
CPCB01J23/462B01J37/10C25B1/04C25B11/081B01J35/391B01J35/393B01J35/33Y02E60/36
Inventor 梁鑫陈立刚
Owner BEIJING UNIV OF CHEM TECH
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