Hydrogen Storage Metal Hydride Formation via Plasma-Activated Ni Nanoclusters
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Solution Overview
Problem
Current hydrogen storage methods using metal hydrides are inefficient and costly due to reliance on expensive catalysts and impure chemical processes, limiting the scalability and affordability of hydrogen energy technologies.
Innovation Solution
A new hydrogenation method combining surface activation with high hydrogen pressure and plasma treatment to form metal and alloy hydrides, eliminating the need for expensive catalysts like Pt and Pd, and enhancing the hydrogenation process by forming Ni nanoclusters on the surface for improved hydrogen absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If expensive catalysts (Pt, Pd, Ni) are used to improve hydrogen adsorption and desorption kinetics, then hydrogen storage efficiency is improved, but manufacturing cost increases
Solution Approach 1:
The invention replaces expensive catalysts (Pt, Pd) with a cheaper alternative system using Ni nanoclusters embedded in an amorphous metal matrix. The amorphous matrix provides a cost-effective substrate that maintains catalytic activity while reducing material costs significantly compared to noble metal catalysts.
Solution Approach 2:
The invention creates a composite structure where Ni nanoclusters are embedded within an amorphous metal matrix. This composite approach combines the high catalytic activity of nickel nanoclusters with the structural benefits and cost advantages of the amorphous matrix, achieving both performance and cost improvements.
2Productivity
If high hydrogen pressure (up to thousands of bars) and high temperature (up to several hundred degree Celsius) are applied, then metal hydride formation is achieved, but energy consumption and equipment complexity increase
Solution Approach 1:
The invention changes the physical and chemical parameters of the metal surface by creating an amorphous matrix structure and embedding Ni nanoclusters. This structural transformation lowers the activation energy for hydrogen absorption, enabling the process to proceed at lower temperatures and pressures compared to conventional crystalline metal surfaces.
Solution Approach 2:
The invention performs preliminary surface modification by forming the amorphous matrix and embedding Ni nanoclusters before hydrogenation. This pre-prepared catalytic structure is designed to facilitate hydrogen absorption under milder conditions, eliminating the need for extreme temperature and pressure conditions required by conventional methods.
3Ease of operation
If conventional catalysts are used, then hydrogenation process is enabled, but the process speed is slow compared to the new method
Solution Approach 1:
The invention replaces conventional bulk catalyst particles with nanoscale Ni nanoclusters embedded in an amorphous matrix. This nanoscale configuration provides dramatically increased surface area and more active sites for hydrogen absorption, accelerating the reaction kinetics by up to ten times compared to conventional catalyst systems.
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 method significantly accelerates the formation of hydrides by up to ten times compared to conventional methods, reducing costs and improving efficiency, while avoiding the use of expensive catalysts and impure chemical treatments.
Implementation Method 1
metals are immersed into hydrogen containing plasma and by applying electrical potential hydrogen ions are 'extracted' from plasma and implanted into sub-surface layers
Implementation Method 2
surface activation and high hydrogen pressure at the single instrument leads towards considerably higher overall efficiency of the hydrogenation process. By using the proposed method it is possible to form hydrides up to ten times faster than using conventional methods
Implementation Method 3
high hydrogen pressure at the single instrument leads towards considerably higher overall efficiency of the hydrogenation process
Implementation Method 4
Method of hydrogenation of metals and their alloys
Data Source
AI summary
The present invention relates to hydrogen energy technologies and particularly to methods of hydrogen storage in metal hydrides. This invention proposes to cover hydrogen storage material with 10-100 nm thickness Ni film and then to place it inside an activation/hydrogenation chamber which is evacuated down to 10 -2 Pa or better vacuum. Then Ar or Ar+H 2 gas mixture (possible hydrogen concentration 0-99%) is supplied and Ar+H 2 plasma is initiated. During the plasma treatment on the surface of hydrogen storage material small Ni nanocatalyst clusters are formed. After plasma activation, the hydrogen pressure is increase up to several tens or few hundred bars and the temperature inside the chamber is risen up to several hundreds degree Celsius. Hydrogen molecules interact with Ni nanocatalysts and split into atoms which move through the grain boundaries to the sites between single nanocrystals where they accumulate and then due to interaction between neighbouring hydrogen atoms a metal hydride is formed.