Tunable Catalyst Support via Metal Ion Intercalation
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Solution Overview
Problem
Current heterogeneous catalysis lacks strategies for continuous control of activity and selectivity, with the support material primarily serving as a high surface area dispersant, rather than being actively tuned to optimize catalytic performance.
Innovation Solution
The method involves providing a catalyst support precursor, intercalating it with a metal ion, and altering its charge state to form a tuned catalyst material, specifically using ternary oxides like NiyLixMn2O4, where y is between 0.40 and 0.6, to modulate the catalytic activity by modifying the support's electronic structure and redox properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the support material is used as a high surface area dispersant for catalytic metal, then the catalyst loading and dispersion are improved, but the ability to continuously control activity and selectivity is limited
Solution Approach 1:
The patent applies parameter changes by modifying the oxidation state of the support material (e.g., changing Mn4+ to Mn3+ ratios in spinel oxides) to continuously tune catalytic activity and selectivity. This allows the support to serve as an active tuning element rather than just a passive dispersant, resolving the contradiction between maintaining high catalyst loading and achieving continuous control over catalytic performance.
Solution Approach 2:
The invention creates composite materials by combining catalytic metals with tunable metal oxide supports (such as NiyLixMn2O4 spinels) where the support composition can be varied to achieve desired catalytic properties. This composite approach enables both high catalyst dispersion and continuous adjustment of activity/selectivity through support composition modification.
2Productivity
If the support material is modified to tune catalytic activity, then the catalytic performance is improved, but the complexity of catalyst preparation increases
Solution Approach 1:
The patent employs preliminary action by pre-synthesizing metal oxide supports with controlled oxidation states (e.g., preparing NiyLixMn2O4 spinels with specific Li content) before catalyst deposition. This pre-tuning of the support allows for simplified subsequent catalyst preparation while maintaining the ability to control catalytic activity through the pre-established support properties.
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 approach allows for the fine-tuning of catalytic activity and selectivity by altering the charge state of the support, enhancing reaction rates and maintaining the oxidation state of the metal, thereby optimizing catalytic performance.
Implementation Method 1
intercalating the catalyst support with a metal ion
Implementation Method 2
altering the catalytic support precursor by addition of a charge... altering a charge state of the untuned catalyst material forming a tuned catalyst material... modulate the catalytic activity by modifying the support's electronic structure and redox properties
Data Source
AI summary
A method of turning a catalytic material by altering the charge state of a catalyst support. The catalyst support is intercalated with a metal ion, altering the charge state to alter and/or augment the catalytic activity of the catalyst material.