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Electrochemical process

A technology of electrochemical and chemical reactions, applied in the direction of electrodes, electrolytic components, electrolytic processes, etc.

Pending Publication Date: 2020-09-04
REPSOL SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In photocatalysis, electron-hole pairs are used immediately to drive redox reactions, but the problem is that electron-hole pairs undergo rapid recombination

Method used

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  • Electrochemical process
  • Electrochemical process
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] Example 1. On TiO 2 Oxygen evolution reaction (OER). An external random disturbance is intentionally provided following a Gaussian white noise pattern.

[0115] Photoelectric (PEC) measurements were performed in a commercial three-electrode quartz cell (Pine Research Instrumentation) connected to a Bio-Logic SP-300 potentiostat (EC-Lab software) equipped with a linear sweep generator. Using 0.5M NaOH solution (250mL) as the electrolyte, wound Pt as the counter electrode, and double junction Ag / AgCl (10% KNO 3 filling solution) as a reference electrode. To avoid photodegradation of the Ag / AgCl reference electrode, it was covered with Teflon tape during the experiment. The working electrode TiO 2 Base photoanode (5.2~5.3cm 2 ) attached to the spring clips and held in the path of the UV source. Growth of TiO on fluorine-doped tin oxide (FTO) glass substrates by a hydrothermal procedure described elsewhere in this paper 2 Nanorods are used to prepare photoelectrodes ...

Embodiment 2

[0153] Example 2. On TiO 2 Oxidation of methylene blue (MB) on External random disturbances are intentionally provided following different patterns.

[0154] Photoelectric (PEC) measurements were performed in a three-electrode quartz cell connected to a Bio-Logic SP-300 potentiostat equipped with a linear sweep generator. Use 0.1M K 2 SO 4 solution (50mL) as electrolyte, wound Pt as counter electrode, and double junction Ag / AgCl (10% KNO 3 filling solution) as a reference electrode. The working electrode TiO 2 base photoanode (2.2cm 2 ) attached to the spring clips and held in the path of the UV source. To avoid photodegradation of the Ag / AgCl reference electrode, it was covered with Teflon tape during the experiment. Add 0.005 g / L of methylene blue to the electrolyte.

[0155] A mounted UV LED was used as radiation source (385nm, Thorlabs). In all experiments under radiation described below, the output of the UV LED was set to 17~18mA / cm 2 The radiation intensity o...

Embodiment 3

[0171] Example 3. Hydrogen evolution reaction (HER) on Si-based photoelectrodes. External random disturbances are intentionally provided following different patterns.

[0172] Photoelectric (PEC) measurements were performed in a three-electrode quartz cell connected to a Bio-Logic SP-300 potentiostat equipped with a linear sweep generator. Use 0.5M H 2 SO 4 Solution (50 mL) was used as electrolyte, Pt coil was used as counter electrode, and Ag / AgCl (saturated KCl) was used as reference electrode. A silicon-based photoelectrode used as the working electrode was attached to a spring clip and held in the path of the UV source. To avoid photodegradation of the Ag / AgCl reference electrode, it was covered with Teflon tape during the experiment.

[0173] A solar simulator (Solar Light, model 16S-300) fitted with an AM 1.5G filter was used as the radiation source, which was located at an appropriate distance to deliver 100 mW / cm 2 .

[0174] In the present case, the working elec...

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Abstract

The present invention relates to an electrochemical device and a method for operating the electrochemical device for inducing specific behaviours in its chemical kinetics by supplying externally selected random (stochastic) voltage perturbations while the electrochemical system is operating in anon- oscillatory regime.

Description

[0001] This application claims the benefit of European Patent Application EP17382867.4 filed on December 19, 2017. [0002] The present invention relates to a method for operating an electrochemical device to induce or improve a non-linear electrochemical reaction in its non-oscillating form. Background technique [0003] In oscillatory chemical reactions, the concentrations of some reactants and products vary with time in a periodic or quasi-periodic manner. These oscillations are the result of reaction imbalances and their nonlinear dynamics. The prototype of an oscillatory reaction is the Belousov-Zhabotinsky reaction, in which a catalyst exhibits redox (reduction-oxidation) oscillations. In the case of a given reaction, its oscillation characteristics (such as period or amplitude) are controlled by the concentrations of the various reactants. [0004] A remarkable aspect of the kinetic behavior of nonlinear chemical systems is their response to random fluctuations in par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B15/02C25B1/00C25B1/08C25B3/04C25B3/25
CPCC25B15/02Y02E60/36C25B1/04C25B9/73C25B1/55C25B3/25C25B15/025C25B11/051C25B11/031C25B15/08
Inventor M·D·埃尔南德斯·阿隆索V·鲁伊兹·桑塔·奎特里亚J·佩雷兹·梅卡德尔
Owner REPSOL SA
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