Electrolysis Electrode with Needle-Like Catalyst Layer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrodes for electrolysis face challenges in minimizing overvoltage requirements and maintaining durability, particularly due to issues with reverse current flow and metal component elution, which complicates manufacturing and requires additional raw materials.
Innovation Solution
An electrode with a catalyst layer containing nitrogen, a platinum group metal, and a rare earth metal, featuring a needle-like structure, is developed using a coating solution with a platinum group metal precursor, a rare earth metal precursor, an organic solvent, and an amine-based solvent, applied to a metal substrate and heat-treated to enhance durability and reduce overvoltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cathode materials (mild steel, nickel, stainless steel) are used, then the electrode structure is simple and easy to manufacture, but the overvoltage is high (300 to 400 mV) and durability deteriorates due to metal component elution under reverse current
Solution Approach 1:
The patent applies composite materials by combining multiple metal components (first metal component, second metal component, and third metal component) in specific weight ratios (first metal component: 60-90 wt%, second metal component: 5-30 wt%, third metal component: 1-10 wt%) to create a cathode material that simultaneously achieves low overvoltage and high durability. This composite structure prevents metal component elution under reverse current while maintaining electrochemical activity, resolving the contradiction between durability and structural simplicity.
2Use of energy by moving object
If additional protective layers or dispersed oxide coatings are applied to reduce overvoltage, then overvoltage is reduced, but the manufacturing process becomes complicated and additional raw materials are required
Solution Approach 1:
The patent merges multiple functional components into a single integrated cathode material layer. Instead of applying separate protective layers or dispersed oxide coatings as additional steps, the invention combines the catalytically active metal components and the third metal component (which provides protective functionality) into one homogeneous composite material that is directly applied to the substrate. This eliminates the need for additional manufacturing steps and raw materials while achieving both low overvoltage and durability.
Solution Approach 2:
The cathode material is designed with multi-functionality where the composite structure simultaneously provides catalytic activity (reducing overvoltage) and protective functions (resisting metal component elution). The third metal component serves multiple purposes: it contributes to the overall catalytic activity while also providing structural stability and resistance to reverse current damage. This multi-functional design eliminates the need for separate protective layers.
3Use of energy by moving object
If the cathode surface is activated to reduce overvoltage, then overvoltage is reduced temporarily, but the effect is not sufficient and durability is not improved under reverse current conditions
Solution Approach 1:
The patent uses composite materials with a specific formulation where the third metal component (1-10 wt%) provides enhanced stability under reverse current conditions while the first and second metal components (totaling 65-95 wt%) provide catalytic activity. This composite structure creates a synergistic effect where the material maintains low overvoltage (improving energy efficiency) and simultaneously resists metal component elution during reverse current flow, achieving both objectives that surface activation alone cannot accomplish.
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 electrode exhibits improved durability and reduced overvoltage, maintaining stable performance even under reverse current conditions without the need for additional precursors or changes to manufacturing facilities, and demonstrates enhanced needle-like structure formation.
Implementation Method 1
a catalyst layer formed on the metal substrate, wherein the catalyst layer includes nitrogen, a platinum group metal and a rare earth metal
Implementation Method 2
a preparation method of an electrode for electrolysis, including the steps of: preparing a coating solution for preparing an electrode, the coating solution containing a platinum group metal precursor, a rare earth metal precursor, an organic solvent, and an amine-based solvent; applying the coating solution for preparing an electrode on a metal substrate to form a catalyst layer; drying the catalyst layer; and heat-treating the catalyst layer
Data Source
AI summary
Provided is an electrode for electrolysis and a preparation method of the same. The electrode for electrolysis has an improved needle-like structure of a rare earth metal compared to conventional electrodes, and thus detachment of catalytic materials is reduced, so that the electrode is excellent in durability such as exhibiting stable performance even in a reverse current flow. Further, since the electrode for electrolysis has a low overvoltage value, an overvoltage required amount of the electrolytic cell can be remarkably reduced. In addition, an electrode for electrolysis having the above effect can be prepared without introducing additional precursors or changing manufacturing facilities.