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Method for making photoelectric hydrogen production electrode and photoelectric hydrogen production electrode

A photoelectric hydrogen production and electrode technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of high resistance, poor crystallinity, and poor conductivity of conductive glass, and achieve improved photoresponse current, good electrode stability, good crystallinity

Inactive Publication Date: 2010-12-08
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent application involves sintering a layer of oxide film on conductive glass. Since the conductive glass and the oxide film on the conductive glass are two different types of substances, the bonding between the conductive glass and the oxide film is not high, thus The electrical conductivity is poor, and because the sintering temperature of the conductive glass cannot be too high, if the conductive glass is formed of WO 3 film, its crystallinity is not good
[0005] Clara Santato, Martine Ulmann, and Jan Augustynski also proposed the preparation of WO on conductive glass in J.Phys.Chem.B2001, 105, 936-940 3 electrode, its disadvantage is that the resistance of the conductive glass is larger than that of the metal tungsten sheet, resulting in a drop in current; in addition, WO 3 There is a problem of poor interface contact between nanomaterials and conductive glass

Method used

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  • Method for making photoelectric hydrogen production electrode and photoelectric hydrogen production electrode
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  • Method for making photoelectric hydrogen production electrode and photoelectric hydrogen production electrode

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preparation example Construction

[0044] In the method for preparing the photoelectric hydrogen production electrode of the present invention provided by the present invention, the method includes the following steps: the first step, providing an anodized substrate; the second step, preparing a slurry for forming an oxide nanoporous film , wherein the oxide contained in the slurry is the oxide of the precursor metal of the anodized substrate; the third step is to apply the slurry to the anodized substrate so that the slurry is on the anodized substrate forming a film on the anodized substrate; and, in the fourth step, sintering the anodized substrate on which the film has been formed.

[0045] First, an anodized substrate suitable for use as a substrate for photoelectric hydrogen production electrodes is selected as the substrate. The precursor of the anodized substrate may be a metal selected from W, Ti, Fe, Ta, Zr and the like. Ta, Fe, Ti, and W are preferred, Fe, Ti, and W are more preferred, and W is part...

Embodiment 1

[0075] Example 1 Anodized substrate-WO 3 Preparation of nanoporous electrodes

[0076] 1. Preparation of anodized substrate

[0077] (1) Use 10mm×30mm×0.2mm metal tungsten sheet with a purity of 99.9% (provided by Beijing General Research Institute for Nonferrous Metals), and use 360-mesh, 600-mesh and 1000-mesh sandpaper to polish, and each kind of sandpaper to polish for 1min.

[0078] (2) Sonicate the polished tungsten sheet in ethanol for 30 minutes with an ultrasonic cleaner, and then dry it at 90°C.

[0079] (3) Place the cleaned two tungsten sheets in parallel in an anodic oxidation pool equipped with 2.0M nitric acid electrolyte, respectively as the anode and cathode of anodic oxidation, and the distance between the two is 2cm; The nitric acid electrolyte is heated to make its temperature reach 40°C; a constant voltage of 30V is applied between the cathode and the anode; the anodic oxidation time is 2 hours.

[0080] (4) Put the anodized tungsten sheet into a tube f...

Embodiment 2

[0085] Example 2 Anodized substrate-WO 3 Preparation of nanoporous electrodes

[0086] 1. Preparation of anodized substrate

[0087] (1) Use 10mm×30mm×0.2mm metal tungsten sheet with a purity of 99.9% (Beijing General Research Institute for Nonferrous Metals), and polish it with 360 mesh, 600 mesh and 1000 mesh sandpaper, and polish each kind of sandpaper for 1 min.

[0088] (2) Sonicate the polished tungsten sheet in ethanol for 30 minutes with an ultrasonic cleaner, and then dry it at 90°C.

[0089] (3) Place the cleaned two tungsten sheets in parallel in an anodic oxidation pool equipped with 2.0M nitric acid electrolyte, respectively as the anode and cathode of anodic oxidation, and the distance between the two is 2cm; The nitric acid electrolyte is heated to 40°C; a constant voltage of 30V is applied between the cathode and the anode; the anodic oxidation time is 2 hours, and the anodized substrate is obtained.

[0090] 2. Add 1g WO 3 The nanopowder was mixed with 3g ...

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Abstract

The invention discloses a method for making a photoelectric hydrogen production electrode and the photoelectric hydrogen production electrode made by the same. The method for making the photoelectric hydrogen production electrode comprises the following steps of: 1, providing an anodic oxidation substrate; 2, preparing pulp used for forming an oxide nanoporous membrane, wherein the oxide contained in the pulp is the oxide of the precursor metal of the anodic oxidation substrate; 3, coating the pulp on the anodic oxidation substrate to make the pulp form a membrane on the anodic oxidation substrate; and 4, sintering the anodic oxidation substrate on which the membrane is formed. In the method, a low-cost oxide nanoporous membrane, such as a WO3 (tungsten trioxide) film structure, is made on a anodic oxidation substrate, such as an anodic oxidation WO3 substrate by a simple blade coating method. The electrode made by the method has the advantages of high stability, tight combination, high photo current response and high degree of crystallization of the WO3.

Description

technical field [0001] The invention relates to a method for preparing an electrode and an electrode prepared by the method, in particular to a method for preparing a photoelectric hydrogen production electrode and the photoelectric hydrogen production electrode prepared by the method. Background technique [0002] Photocatalytic water splitting for hydrogen production uses solar energy and water to produce hydrogen without by-products, and can obtain hydrogen and oxygen at the two poles without pollution, showing strong advantages and development potential. But the efficiency is still low. In order to improve the efficiency of hydrogen production, it is necessary to optimize various factors of the photocatalytic hydrogen production system, especially the photocatalytic electrode materials. WO 3 Due to its high discoloration efficiency and low price, it has always been the first choice of electrochromic compounds, so it has also attracted people's attention as a photocatal...

Claims

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Application Information

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IPC IPC(8): C25B11/00C25B9/04C25B1/04
CPCY02E60/366Y02E60/36
Inventor 丁天朋赵伟赵云峰沈晓彦
Owner ENN SCI & TECH DEV
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