Cu2(OH)3NO3/CaSiO3/g-C3N4 Nanocomposite for Hydrogen Generation
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Solution Overview
Problem
The high cost and rarity of noble metals used in catalysts for hydrogen generation from sodium borohydride hydrolysis hinder practical utilization, and existing transition metal catalysts are inefficient for hydrogen production.
Innovation Solution
A Cu2(OH)3NO3/CaSiO3/g-C3N4 nanocomposite is used to catalyze the hydrolysis of sodium borohydride, generating hydrogen efficiently at ambient or elevated temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If noble metals are used as catalysts for hydrogen generation from sodium borohydride hydrolysis, then hydrogen generation efficiency is improved, but cost and rarity become prohibitive
Solution Approach 1:
The patent replaces expensive noble metals with transition metals (Cu, Ni, Co, Mn, Zn) that are cheaper and more abundant. The catalyst is designed as a disposable or easily replaceable component, with the Cu2(OH)3NO3/CaSiO3/g-C3N4 nanocomposite serving as a cost-effective alternative to noble metal catalysts while maintaining acceptable hydrogen generation efficiency
Solution Approach 2:
The patent employs a composite nanocomposite material consisting of Cu2(OH)3NO3, CaSiO3, and g-C3N4. This composite structure combines multiple materials to achieve catalytic activity comparable to noble metals while using abundant transition metals, thereby resolving the contradiction between efficiency and cost
2Ease of manufacture
If transition metals are used as catalysts instead of noble metals, then cost is reduced, but hydrogen generation efficiency decreases
Solution Approach 1:
The patent uses a composite nanocomposite of Cu2(OH)3NO3, CaSiO3, and g-C3N4 where the synergistic interaction between components enhances the catalytic activity of the transition metal, compensating for the lower intrinsic activity compared to noble metals and achieving acceptable hydrogen generation efficiency at lower cost
Solution Approach 2:
The nanocomposite utilizes porous structures with high surface area to volume ratio, providing numerous active sites for catalysis. The porous architecture of g-C3N4 and CaSiO3 components increases the effective surface area of the transition metal catalyst, thereby enhancing hydrogen generation efficiency despite using cheaper materials
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 nanocomposite achieves hydrogen generation rates several times higher than without the catalyst, demonstrating a cost-effective and efficient method for hydrogen production.
Implementation Method 1
a Cu2(OH)3NO3/CaSiO3/g-C3N4 nanocomposite is used to catalyze the hydrolysis of sodium borohydride
Implementation Method 2
hydrolyzing sodium borohydride in the presence of water catalyzed by the Cu2(OH)3NO3/CaSiO3/g-C3N4 nanocomposite
Data Source
AI summary
A method of generating hydrogen includes reacting sodium borohydride with water in the presence of a Cu2(OH)3NO3/CaSiO3/g-C3N4 nanocomposite to hydrolyze sodium borohydride and generate hydrogen. The nanocomposite used is fabricated by mixing CaSiO3, g-C3N4, and a copper salt in a glycol solvent to form a mixture and further microwaving the mixture to obtain the Cu2(OH)3NO3/CaSiO3/g-C3N4 nanocomposite.