Apparatus and methods for electrochemical generation of oxygen and/or hydrogen

An electrochemical and hydrogen technology, applied in the direction of power generation process, electrolytic components, electrolytic process, etc.

Active Publication Date: 2014-09-17
格拉斯哥大学行政评议会
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, despite this awareness, renewable energy sources such as wind and solar power have not yet been fully exploited on a large scale to replace fossil fuels

Method used

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  • Apparatus and methods for electrochemical generation of oxygen and/or hydrogen
  • Apparatus and methods for electrochemical generation of oxygen and/or hydrogen
  • Apparatus and methods for electrochemical generation of oxygen and/or hydrogen

Examples

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Embodiment

[0276] The following examples are provided merely to illustrate the invention and are not intended to limit the scope of the invention as described herein.

[0277] Medium and Examples of Use

[0278] Commercially available polyoxometalates-phosphomolybdic acid (H 3 Mo 12 PO 40 ) was chosen as the medium for the example of the present invention. 0.5M H 3 Mo 12 PO 40 The cyclic voltammetry curve (CV) of aqueous solution (pH=0.3) on platinum (Pt) electrode is shown in figure 2 (All potentials are relative to NHE).

[0279] figure 2 Highlighted in are the reduction and oxidation fluctuations in the reversible 2-electron redox process around the PEB around +0.7V. figure 2 (inset) shows how the peak currents for oxidation and reduction activity are related to this fluctuation as the square root of the scan rate: the observed linear trend suggests that both processes are limited only by diffusion on the Pt electrode (see also image 3 ). Based on the position of the OE...

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Abstract

The invention provides methods for producing hydrogen and oxygen, comprising the steps of:(i) oxidising a mediator at a working electrode to yield an oxidised mediator, and reducing protons at a counter electrode to yield hydrogen; and (ii) reducing an oxidised mediator at a working electrode to yield a mediator, and oxidising water at a counter electrode to yield oxygen, wherein the oxygen generation step is performed non-simultaneously to the hydrogen generation step, and the oxidised mediator of step (i) is used as the oxidised mediator of step (ii), or the mediator of step (ii) is used as the mediator of step (i), and the mediator has a reversible redox wave lying between the onset of the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER).

Description

[0001] related application [0002] This application claims the benefit and priority of GB1119283.8 filed on November 08, 2012 (08 / 11 / 2012), which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to a method for producing hydrogen and / or oxygen using electrochemical methods, and optionally using light as a power source. The invention also relates to the use of redox-active chemical mediators in such methods. Electrochemical cells for generating hydrogen and / or oxygen are also provided. Background technique [0004] The need for sustainable carbon-neutral technologies to meet the world's growing energy demands has become a widely recognized imperative. However, despite this awareness, renewable energy sources such as wind and solar power have not been fully exploited on a large scale to replace fossil fuels. This is mainly due to the intermittent nature of the supply: reliable storage of energy generated from renew...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00C25B1/10C25B15/08
CPCC25B15/08C25B1/003Y02E60/368C25B1/10C25B5/00Y02E60/36C25B1/55C25B1/04C25B9/73Y02P20/133
Inventor 勒罗伊·克罗宁马克·赛姆斯
Owner 格拉斯哥大学行政评议会
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