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Method for preparing nano platinum/ruthenium modified titanium dioxide nanotube electrode by utilizing pulse electrodeposition

A pulse electrodeposition, titanium dioxide technology, applied in anodic oxidation, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problems of low current density, hydrogen evolution reaction, etc., achieve improved electrocatalytic performance, high resistance to CO poisoning, and reduce use volume effect

Active Publication Date: 2013-08-21
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The problem to be solved by the present invention is to provide a new technology for preparing nano-platinum / ruthenium-modified titanium dioxide nanotube electrodes by pulse electrodeposition, and to obtain Pt / Ru-TiO with good performance by pulse electrodeposition and a simple and stable process. 2 / Ti nanotube electrode, to overcome the problems of low current density and serious hydrogen evolution reaction during DC deposition

Method used

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  • Method for preparing nano platinum/ruthenium modified titanium dioxide nanotube electrode by utilizing pulse electrodeposition
  • Method for preparing nano platinum/ruthenium modified titanium dioxide nanotube electrode by utilizing pulse electrodeposition
  • Method for preparing nano platinum/ruthenium modified titanium dioxide nanotube electrode by utilizing pulse electrodeposition

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example 1

[0027] Example 1. After surface treatment of 1cm*1cm TA1 titanium sheet (surface treatment is to polish the titanium sheet on sandpaper, use acetone ultrasonic cleaning to remove surface oil, then put it into alcohol for ultrasonic cleaning, and then rinse it with distilled water. Make an electrode after drying. The following examples are the same) put in a solution containing 1g / L NH 4 HF 2 , 50g / L H 2 The ethylene glycol solution of O was subjected to anodic oxidation at a constant voltage of 60V and a temperature of 10°C for 1h, with constant mechanical stirring during the period. Prepared TiO 2 The nanotubes were heat treated at 500°C for 2 hours and cooled with the furnace. TiO after high temperature heat treatment 2 The nanotubes were placed in a mixed aqueous solution containing 4.0mM chloroplatinic acid, 4.0mM ruthenium trichloride and 0.5M sulfuric acid, and the cathode and anode pulse current densities were -250mA / cm and 250mA / cm respectively. 2 , the cathode pu...

example 2

[0028] Example 2. After surface treatment of 1cm*1cm TA1 titanium sheet (surface treatment is to polish the titanium sheet on sandpaper, use acetone ultrasonic cleaning to remove surface oil, then put it in alcohol for ultrasonic cleaning, and then rinse it with distilled water. Make an electrode after drying. The following examples are all the same) put in 3g / L NH 4 HF 2 , 100g / L H 2 The ethylene glycol solution of O was anodized at a constant voltage of 30V and a temperature of 20°C for 4h, with constant mechanical stirring. Prepared TiO 2 The nanotubes were heat treated at 450°C for 4 hours and cooled with the furnace. TiO after high temperature heat treatment 2 The nanotubes were placed in a mixed aqueous solution containing 4.0mM chloroplatinic acid, 1.0mM ruthenium trichloride, and 0.5M sulfuric acid, and the pulse current densities of the cathode and anode were -350mA / cm and 350mA / cm respectively. 2 , the on-time of cathode and anode pulses is 2ms, the off-time is ...

example 3

[0029] Example 3. After surface treatment of 1cm*1cm TA1 titanium sheet (surface treatment is to polish the titanium sheet on sandpaper, use acetone ultrasonic cleaning to remove surface oil, then put it into alcohol for ultrasonic cleaning, and then rinse it with distilled water. Make an electrode after drying. The following examples are all the same) put in 5g / L NH 4 HF 2 , 200g / L H 2 The ethylene glycol solution of O was subjected to anodic oxidation at a constant voltage of 10V and a temperature of 30°C for 6h, with constant mechanical stirring during the period. Prepared TiO 2 The nanotubes were heat treated at 350°C for 4 hours and cooled with the furnace. TiO after high temperature heat treatment 2 The nanotubes were placed in a mixed aqueous solution containing 1.0mM chloroplatinic acid, 0.5mM ruthenium trichloride, and 0.5M sulfuric acid, and the pulse current densities of the cathode and anode were -350mA / cm and 350mA / cm respectively. 2 , the cathode and anode p...

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Abstract

The invention discloses a method for preparing a nano platinum / ruthenium modified titanium dioxide nanotube electrode by utilizing pulse electrodeposition, and is applied to the technical field of photoelectrocatalysis. At present, most of the defects of a precious metal platinum modified titanium dioxide nanotube electrode include low current density, severe poisoning and low catalytic performance. The method for preparing the nano platinum / ruthenium modified titanium dioxide nanotube electrode provided by the invention comprises the following steps of: firstly preparing titanium dioxide nanotube arrays which are ranked in order and are oriented vertically on a titanium sheet by adopting an anodic oxidation method, and then preparing the nano platinum / ruthenium modified titanium dioxide nanotube electrode by adopting a pulse electrodeposition method. CO adsorbed on the surface of precious metal can be eliminated by the synergistic effect of platinum and ruthenium; catalyst damage is lowered; meanwhile, the catalytic initial potential moves negatively obviously, and the electro-catalytic property of the electrode is improved; and the method for preparing the nano platinum / ruthenium modified titanium dioxide nanotube electrode by utilizing pulse electrodeposition has an important research value and wide application prospects.

Description

technical field [0001] The invention discloses a method for preparing nano-platinum / ruthenium-modified titanium dioxide nanotube electrodes by pulse electrodeposition, which belongs to the technical field of photoelectric catalysis. Background technique [0002] TiO 2 Due to its special structure, the nanotube array produces surface effects, quantum size effects, etc., and has the characteristics of large specific surface area, high stability, strong acid and alkali resistance, and good photoelectric catalytic performance. It is the most ideal electrode material for catalyst carriers. The field has very broad application prospects. Combining noble metal nanoparticles with high catalytic activity with TiO 2 The combination of nanotubes can obtain a new type of electrode with high catalytic activity and stable performance, which has attracted widespread attention. [0003] At present, the nano-platinum modified titania nanotube electrode has been studied more, which has the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/02C25D11/18C25D11/20C25D3/50
Inventor 李洪义王金淑刘曼
Owner BEIJING UNIV OF TECH
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