Porous Electrocatalyst Composition for Rare-Metal-Free Water Splitting
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Solution Overview
Problem
The high cost and scarcity of rare metals like iridium and platinum limit the mass production of electrocatalysts used in water splitting for hydrogen production, necessitating the development of catalysts that reduce dependence on these metals while maintaining electrocatalytic efficiency.
Innovation Solution
The development of cathode and anode electrocatalysts comprising metal carriers with molybdenum, cobalt, nickel, and nitrogen or phosphorus, respectively, doped with aluminum, gallium, or phosphorus, which are manufactured through a series of hydrothermal and calcination processes to achieve a porous structure and improved reaction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rare metals such as iridium and platinum are used for electrocatalytic water splitting, then electrocatalytic efficiency is improved, but cost increases and mass production is limited
Solution Approach 1:
The patent changes the material composition parameters by replacing rare metals (Ir, Pt) with abundant metals (Mo, Co, Ni, Fe) combined with non-metallic elements (N, P). This substitution maintains electrocatalytic efficiency while enabling mass production, directly resolving the contradiction between reliability and ease of manufacture
Solution Approach 2:
The patent creates composite electrocatalyst materials by combining multiple abundant metals (e.g., Mo-Co-Ni, Fe-Co-Ni) with non-metallic elements (N, P). These composite structures achieve catalytic performance comparable to rare metals while being cost-effective and scalable for mass production
2Reliability
If rare metals such as iridium and platinum are used for electrocatalytic water splitting, then electrocatalytic efficiency is improved, but dependence on scarce resources increases
Solution Approach 1:
The patent fundamentally changes the material composition from rare metals to abundant metals combined with non-metallic elements. This parameter change maintains catalytic efficiency while using materials with much higher availability, resolving the contradiction between reliability and quantity of substance
Solution Approach 2:
The patent adopts abundant, inexpensive metals (Mo, Co, Ni, Fe) that can be easily sourced and replaced, eliminating dependence on scarce rare metals. These materials provide sufficient catalytic activity for practical applications while being readily available in large quantities
3Ease of manufacture
If traditional electrocatalysts are used, then rare metal dependence is maintained, but cost-effective alternatives are not achieved
Solution Approach 1:
The patent develops composite materials combining abundant metals (Mo, Co, Ni, Fe) with non-metallic elements (N, P) to achieve catalytic efficiency comparable to rare metals. This composite approach resolves the contradiction by providing both cost effectiveness and high reliability
Solution Approach 2:
The patent optimizes the composition parameters of abundant metals and non-metallic elements to achieve maximum catalytic efficiency. By carefully controlling the ratios and combinations (e.g., Mo-Co-Ni with N, Fe-Co-Ni with P), the patent achieves reliability comparable to rare metals while maintaining cost effectiveness
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 new electrocatalysts demonstrate stable performance for up to 90 days in water splitting reactions, achieving comparable efficiency to platinum-based catalysts and enabling industrial-scale hydrogen production.
Implementation Method 1
by doping the cathode electrocatalyst material with cations and anions, the hydrogen evolution reaction (HER) efficiency of the cathode electrocatalyst can be improved
Implementation Method 2
placing a first metal salt solution and a metal carrier in a reaction bottle to perform a hydrothermal reaction to obtain a first intermediate
Implementation Method 3
placing the first intermediate in a nitrogen gas atmosphere and performing a first calcination to obtain a second intermediate
Data Source
AI summary
An electrocatalyst and a manufacturing method thereof are provided. The electrocatalyst is a cathode electrocatalyst or an anode elctrocatalyst, wherein the cathode electrocatalyst comprises: a metal carrier; and a cathode electrocatalyst material disposed on the metal carrier; wherein the cathode electrocatalyst material comprises molybdenum, cobalt, nickel and nitrogen and further comprises one of aluminum and gallium.