Working Electrode Charge Control to Lower Electrochemical Overpotential
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Solution Overview
Problem
Conventional electrochemical processes are inefficient due to the formation of a charge layer on the working electrode, which increases binding energy and requires higher over-potential, leading to high energy consumption without significant performance improvement.
Innovation Solution
Independent control of the charge on the working electrode through the application of an electric field, using a gate electrode or capacitor arrangement, to reduce over-potential and enhance reaction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional electrochemical processes are used with a working electrode, then the electrochemical reaction can proceed, but a charge layer forms on the electrode which increases binding energy and requires higher over-potential, leading to high energy consumption
Solution Approach 1:
The invention separates the control of electrode charge from the electrochemical reaction process by introducing a gate electrode that is electrically isolated from the working electrode. This segmentation allows independent control of charge state and reaction conditions, enabling optimization of both energy consumption and reaction efficiency without the traditional trade-off.
Solution Approach 2:
The gate electrode acts as an intermediary that indirectly controls the charge state of the working electrode through electric field effects without direct electrical connection. This intermediary mechanism allows precise charge modulation while maintaining electrical isolation, reducing energy consumption without compromising reaction reliability.
2Productivity
If expensive catalyst materials are used for the working electrode, then electrocatalytic reaction efficiency is improved, but the cost and difficulty of working with the materials increases
Solution Approach 1:
The invention changes the key parameter of electrode charge state independently of the electrode material composition. By controlling the charge state through the gate electrode, the system can achieve high electrocatalytic efficiency with inexpensive materials, eliminating the need for expensive catalysts while maintaining productivity and improving ease of manufacture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for improved efficiency in electrochemical reactions by reducing the over-potential required, enabling the use of cheaper materials and achieving performance comparable to industry standards with less energy consumption.
Implementation Method 1
the step of controlling the charge on the electrode comprises the step of applying an electric field to the electrode
Implementation Method 2
the electric field may be applied via a further electrode positioned proximate to the electrode. The further electrode may be a gate electrode, to which a voltage is applied to regulate the charge on the electrode
Implementation Method 3
The capacitor arrangement may comprise a further electrode and the electrode positioned relative to each other to form a capacitor
Implementation Method 4
In electrocatalytic reactions, the Working Electrode may be of a material which facilitates (catalyses) the electrochemical reaction
Implementation Method 5
Electrochemical and electrocatalytic reactions are widely used for applications such as Hydrogen Evolution Reaction (HER), formation of oxygen from water (Oxygen Evolution Reaction, OER), reduction of oxygen to water (Oxygen Reduction Reaction, ORR) and many other Redox reactions
Data Source
AI summary
The present disclosure provides a method and apparatus to perform an electrochemical process by manipulating the charge on an electrode involved in the primary circuit of the electrochemical reaction. The amount of charge on the electrode can be manipulated independent of the bias voltage of the primary circuit and is accomplished by coupling the electrode with various different configurations.