Photo-Enhanced Electrocatalysis for Low-Overpotential Molecule Breakdown
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing catalytic systems face challenges with high overpotential barriers and kinetic barriers, relying on scarce and expensive platinum group metals (PGMs) for efficient breakdown of aqueous and gaseous molecules, and there is a need for more cost-effective and efficient catalytic processes.
Innovation Solution
A photo-enhanced electro-catalytic (PEEC) system using a combination of electro-catalytic and photo-catalytic processes with high energy photon sources like ultraviolet, vacuum ultraviolet, soft X-rays, and gamma rays to enhance the catalytic effect by increasing surface energy and collision frequency, reducing the energy required for molecular breakdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If platinum group metals are used as catalytic agents, then catalytic efficiency and durability are improved, but cost and availability worsen due to scarcity and high price
Solution Approach 1:
The patent applies parameter changes by modifying the electronic structure of transition metal catalysts through photon irradiation. High-energy photons (UV, VUV, X-ray, or gamma ray) alter the electron distribution and energy states of the catalyst surface, thereby changing its catalytic properties to achieve PGM-level efficiency with cheaper metals
Solution Approach 2:
The patent substitutes the mechanical/chemical approach of using expensive PGMs with a field-based approach using high-energy photon irradiation. This replaces the material-dependent catalytic mechanism with a energy-field-enhanced mechanism that works on abundant transition metals
2Productivity
If conventional electro-catalytic processes are used, then molecular breakdown is achieved, but high overpotential barriers and kinetic barriers increase energy consumption
Solution Approach 1:
The patent applies preliminary action by irradiating the catalyst with high-energy photons before the main catalytic reaction occurs. This pre-energizes the catalyst surface and reactants, creating favorable conditions for the subsequent reaction to proceed with lower activation energy and reduced overpotential
Solution Approach 2:
The patent employs periodic action through pulsed photon irradiation during the electro-catalytic process. The intermittent high-energy photon input periodically resets and re-energizes the catalyst surface, maintaining high activity and reducing cumulative energy consumption compared to continuous high overpotential application
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
The PEEC system significantly lowers the energy needed for molecular breakdown, offering a cost-effective and efficient method for dissociating gaseous and aqueous molecules, particularly in applications like hydrogen production and carbon dioxide conversion.
Implementation Method 1
photo-enhanced electro-catalytic (PEEC) system using a combination of electro-catalytic and photo-catalytic processes with high energy photon sources
Implementation Method 2
photo-enhanced electro-catalytic (PEEC) system using a combination of electro-catalytic and photo-catalytic processes
Implementation Method 3
enhance the catalytic effect by increasing surface energy and collision frequency
Implementation Method 4
the dissociation of water molecules into hydrogen and oxygen requires a bipolar catalytic medium
Implementation Method 5
electro-catalytic medium... DC power source creates a cathode side of the electro-catalytic medium and an anode side
Implementation Method 6
Pt also exerts a catalytic effect on the cooperative carbon-NO2—O2 oxidation reaction. An overall mechanism involving the formation of atomic oxygen over Pt sites followed by its transfer to the carbon surface
Implementation Method 7
high energy photon emission source emits photons having a wavelength less than 100 nm
Implementation Method 8
high energy photon source is configured to be adjacent the electro-catalytic medium
Data Source
AI summary
A photo-catalyst (EP) is regarded as an alternate method to replace the plasma chemical process and as an additional catalytic processing scheme on top of a micro- or nano-structured catalyst (EC) and electro-catalyst (EV). The potential energy reduction that results from the effect of photo-enhanced electro-catalyst (PEEC) is significant.