FeNiMoO Anode Catalyst for Water Electrolysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current water electrolysis for hydrogen production faces high energy consumption due to high overpotential, primarily attributed to the expensive noble metal electrodes, necessitating a cost-effective non-noble metal catalyst for the oxygen evolution reaction (OER) to enhance efficiency and reduce costs.
Innovation Solution
Development of an anode catalyst material with the chemical formula FeaNibMcNdOe, where M is Mo, W, Sn, Si, Nb, V, Cr, or Ta, optimized within specific elemental ratios to achieve low overpotential and high current activity for the OER, replacing expensive noble metals like Pt or IrO2.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If noble metal electrodes (Pt or IrO2) are used for the oxygen evolution reaction, then catalytic activity is improved, but cost increases significantly
Solution Approach 1:
The patent replaces expensive noble metal catalysts (Pt, IrO2) with a cost-effective non-noble metal catalyst composed of Fe, Ni, Mo, N, and O in specific ratios. This substitution maintains adequate catalytic activity for the oxygen evolution reaction while dramatically reducing material cost, aligning with the principle of using cheaper alternative materials to replace expensive ones.
Solution Approach 2:
The patent optimizes the catalyst composition by precisely controlling the atomic ratios of Fe, Ni, Mo, N, and O elements. By adjusting these compositional parameters within specific ranges, the catalyst achieves optimal balance between cost and catalytic performance, demonstrating parameter changes to resolve the contradiction between cost and activity.
2Productivity
If traditional electrolysis methods are used, then hydrogen production is achieved, but energy consumption is excessively high due to high overpotential
Solution Approach 1:
The patent employs a non-noble metal catalyst that reduces overpotential compared to conventional electrodes, thereby lowering the energy input required for water electrolysis. This enables hydrogen production with reduced energy consumption while maintaining productivity.
Solution Approach 2:
By optimizing the catalyst's elemental composition (Fe, Ni, Mo, N, O ratios), the patent modifies the electrochemical parameters of the oxygen evolution reaction, specifically reducing overpotential. This parameter optimization directly addresses the high energy consumption issue while preserving hydrogen production efficiency.
3Ease of manufacture
If non-noble metal catalysts are used to replace noble metals, then cost is reduced, but catalytic activity and current density decrease
Solution Approach 1:
The patent creates a composite catalyst system combining multiple non-noble metal elements (Fe, Ni, Mo) with nitrogen and oxygen in a specific ratio. This composite structure synergistically enhances catalytic activity compared to single-element catalysts, while maintaining cost advantages over noble metals. The composite material approach resolves the contradiction by achieving adequate activity through material composition rather than relying on expensive noble metals.
Solution Approach 2:
The patent systematically optimizes the atomic ratios of Fe, Ni, Mo, N, and O to achieve peak catalytic performance. By adjusting these compositional parameters, the catalyst reaches an optimal balance where cost is reduced compared to noble metals while catalytic activity remains sufficient for practical hydrogen production applications.
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 proposed catalyst material significantly reduces the onset potential and increases current density during hydrogen evolution, offering a cost-effective and efficient alternative for water electrolysis, thereby addressing the energy consumption and cost issues associated with traditional methods.
Implementation Method 1
The activation energy can be decreased by the catalysis of the electrode surface, which is determined by the inherent catalytic properties of the electrode material
Implementation Method 2
electrolysis of water is the easiest way to generate hydrogen and oxygen
Data Source
AI summary
An anode catalyst material has a chemical formula of FeaNibMcNdOe, wherein M is Mo, W, Sn, Si, Nb, V, Cr, Ta or a combination thereof. a+b+c+d+e=1, a>0, b>0, c>0, d≥0, and e≥0. The anode catalyst material can be used in a water electrolysis device for hydrogen evolution, which includes an anode and a cathode disposed in an alkaline aqueous solution, and the anode includes the described anode catalyst material.