Preparing method of novel Ce-La co-doped high-catalytic-activity Ti/Ce-Lanano-TiO2 modified electrode and method for electrocatalytic reduction of L-cystine through modified electrode

A ce-lanano-tio2, high catalytic activity technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of poor corrosion resistance of electrodes, heavy metal pollution of products, poor catalytic activity of electrodes, etc. Enhanced catalytic activity and stability, the effect of increased electrocatalytic sites

Inactive Publication Date: 2016-01-27
HUAINAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the L-cysteine ​​electrosynthesis industry, pure Pb plates are widely used as cathode materials, and the current efficiency is generally not high. Deactivation, poor corrosion resistance of the electrode, poor selectivity, resulting in many side reactions, which cannot be realized in industrial production, and the economic benefits are not high
After retrieval, it was published in the Journal of Electrochemistry, Volume

Method used

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Comparison scheme
Effect test

Embodiment 1

[0050] A kind of novel Ce-La co-doped high catalytic activity Ti / Ce-Lanano-TiO of the present embodiment The method for the electrocatalytic reduction of L-cystine of modified electrode, its steps are:

[0051] Step 1. Preparation of highly active Ti / Ce-Lanano-TiO modified by rare earth Ce and La co-doping 2 modified electrode

[0052] 1) Using pure titanium metal as the substrate, the pure titanium metal mentioned here refers to titanium metal with a purity of 99.5-99.7%.

[0053] Use 800-mesh and 2000-mesh corundum paper to polish the titanium substrate sequentially. After the grinding is completed, wash and remove oil with acetone and absolute ethanol in turn, and then put the titanium substrate after degreasing into a mixed solution of HF and ethylene glycol for ultrasonic corrosion for 20 minutes. The volume ratio of hydrofluoric acid and ethylene glycol is 1:4. Finally, it was ultrasonically washed with secondary water, acetone, and absolute ethanol for 20 minutes, and...

Embodiment 2

[0063] A kind of novel Ce-La co-doped high catalytic activity Ti / Ce-Lanano-TiO of the present embodiment The method for the electrocatalytic reduction of L-cystine of modified electrode, its steps are:

[0064] Step 1. Preparation of highly active Ti / Ce-Lanano-TiO modified by rare earth Ce and La co-doping 2 modified electrode

[0065] 1) Using pure titanium metal as the substrate, the pure titanium metal mentioned here refers to titanium metal with a purity of 99.5-99.7%.

[0066] Use 800-mesh and 2000-mesh corundum paper to polish the titanium substrate sequentially. After the grinding is completed, wash and remove oil with acetone and absolute ethanol in turn, and then put the titanium substrate after degreasing into a mixed solution of HF and ethylene glycol for ultrasonic corrosion for 20 minutes. The volume ratio of HF and ethylene glycol is 1:4. Finally, it was ultrasonically washed with secondary water, acetone, and absolute ethanol for 20 minutes, and dried in vacuu...

Embodiment 3

[0076] A kind of novel Ce-La co-doped high catalytic activity Ti / Ce-Lanano-TiO of the present embodiment The method for the electrocatalytic reduction of L-cystine of modified electrode, its steps are:

[0077] Step 1. Preparation of highly active Ti / Ce-Lanano-TiO modified by rare earth Ce and La co-doping 2 modified electrode

[0078]1) Using pure titanium metal as the substrate, the pure titanium metal mentioned here refers to titanium metal with a purity of 99.5-99.7%.

[0079] Use 800-mesh and 2000-mesh emery paper to polish the titanium substrate sequentially. After the grinding is completed, wash and remove oil with acetone and absolute ethanol in sequence, and then put the titanium substrate after degreasing into a mixed solution of HF and ethylene glycol for ultrasonic corrosion for 15 minutes. The volume ratio of HF and ethylene glycol is 1:4. Finally, it was ultrasonically washed with secondary water, acetone, and absolute ethanol for 15 minutes, and dried in vacuu...

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Abstract

The invention discloses a preparing method of a novel Ce-La co-doped high-catalytic-activity Ti/Ce-Lanano-TiO2 modified electrode and a method for electrocatalytic reduction of L-cystine through the modified electrode, and belongs to the technical field of organic electricity synthesis. The method comprises the specific steps that the rare earth Ce-La co-doped Ti/Ce-Lanano-TiO2 modified electrode is prepared; organic electricity synthesis is carried out, electrocatalytic reduction of L-cystine is carried out, L-cysteine is prepared, a self-assembled diaphragm plate frame type electrolytic cell is included, an electrolyte is prepared, and electrolysis operation is carried out; and product extraction is carried out, the electrolyzed electrolyte is extracted and purified, and then the L-cysteine product is obtained. The high-catalytic-activity Ti/Ce-Lanano-TiO2 modified electrode prepared through co-doped modification of rare earth Ce and rare earth La serves as a cathode, electrode crystal particles are fine and even, and the catalytic activity and stability of a TiO2 electrode are improved; and the electro-catalytic property, the corrosion resistance and selectivity of the electrode are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of organic electrosynthesis, more specifically, relates to a novel Ce-La co-doped high catalytic activity Ti / Ce-Lanano-TiO 2 The preparation of the modified electrode and its electrocatalytic reduction of L-cystine to synthesize L-cysteine. Background technique [0002] L-cysteine ​​(L-cysteine) is one of the 20 amino acids that make up protein and belongs to the aliphatic amino acid. In proteins, L-cysteine ​​often exists in the form of its oxidized L-cystine, which is oxidized by the -SH groups on the two L-cysteine ​​side chains to form a covalent disulfide bridge (disulfidebridge) connected. L-cysteine ​​was first discovered in the form of cystine from bladder stones in 1810, and its chemical name is L-α-amino-β-mercaptopropionic acid (C 3 h 7 NO 2 S), the molecular mass is 121.12, L-cysteine ​​is a white crystalline powder, peculiar smell, sour taste, soluble in water, slightly soluble in ethanol, ...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B3/04C25B3/25
Inventor 徐迈宋文良王凤武朱传高方文彦魏亦军
Owner HUAINAN NORMAL UNIV
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