Cobalt Nanosphere Catalyst Structure to Prevent Active Component Loss
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Solution Overview
Problem
Cobalt-based catalysts face issues with active component loss and deactivation during use, leading to difficulties in product separation and increased production costs due to their susceptibility to losing catalytic activity.
Innovation Solution
A cobalt catalyst is prepared by growing catalytically active hydrangea-like nanospheres on a cobalt-based substrate, utilizing a method that includes heating a sulfur source with the carrier in a protective gas atmosphere and subjecting the precursor to electrical activation in an electrolyte to form cobalt oxyhydroxide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cobalt-based catalysts are used as supported catalysts, then catalytic activity is achieved, but active components are lost during use causing deactivation
Solution Approach 1:
The patent merges the carrier and active substance into a single integrated structure where cobalt oxyhydroxide nanospheres are grown directly on the cobalt-based carrier surface. This combination ensures the active substance cannot separate from the carrier, solving the problem of active component loss while maintaining catalytic activity.
Solution Approach 2:
The carrier serves dual functions: it acts as both the structural support and the source of active components. The cobalt-based carrier provides cobalt ions that form the active cobalt oxyhydroxide substance during the preparation process, eliminating the need for separate active substance addition and preventing subsequent loss.
2Ease of manufacture
If cobalt-based catalysts are used, then cost reduction is achieved compared to precious metals, but catalyst deactivation occurs reducing service life
Solution Approach 1:
The integrated structure where active cobalt oxyhydroxide nanospheres are grown on the cobalt-based carrier prevents active component detachment and catalyst deactivation. This design extends catalyst service life while maintaining the cost advantage of using cobalt instead of precious metals.
Solution Approach 2:
The patent changes the physical and chemical parameters of the catalyst structure by controlling the growth of nanospheres with specific size ranges (100-500 nm diameter) and sheet layer thickness (1-10 nm), optimizing both performance and stability to extend service life.
3Adaptability or versatility
If traditional supported catalysts are used, then catalytic function is provided, but product separation becomes difficult increasing operational steps
Solution Approach 1:
By combining the active substance and carrier into an integrated structure, the catalyst maintains its catalytic function while becoming easier to separate from products. The monolithic structure prevents fragmentation and simplifies filtration and purification steps.
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 catalyst exhibits strong catalytic performance with stable active components, easy separation, and a longer service life, offering high specific surface area and effective mass transfer channels, while being cost-effective and efficient to produce.
Implementation Method 1
heating the carrier and a sulfur source in a protective gas atmosphere for conducting a reaction to obtain a precursor
Implementation Method 2
subjecting the precursor in an electrolyte for electrical activation to obtain the cobalt catalyst
Data Source
AI summary
A cobalt catalyst and a preparation method thereof are provided. The cobalt catalyst includes a carrier and a catalytically active substance; the carrier is a cobalt-based substrate material; the catalytically active substance is grown on the surface of the carrier, and the catalytically active substance has a morphology of hydrangea-shaped nanospheres. The cobalt catalyst is an autogenously grown monolithic nanosphere catalyst with a three-dimensional structure assembled by nano-sheets on the catalyst surface. The cobalt catalyst has a high specific surface area and can fully expose the catalytically active sites to enhance the catalytic efficiency. Compared to a nanowire catalyst, the cobalt catalyst has better self-supporting properties, and the active components are not easily aggregated nor fall off during a use process. Therefore, the cobalt catalyst has a longer service life.