Publication date: 27th March 2025
Revolutionizing Water Electrolysis: A Membraneless Approach for Hydrogen
Abstract
Electrochemical hydrogen production from water and renewable energy is promising for decarbonization, but traditional alkaline electrolyzers face efficiency issues, while proton exchange membrane electrolyzers have high material and operating costs. Herein, we design a membraneless electrolyzer leveraging Tesla valve geometry and fluidic forces for efficient hydrogen generation, offering a cost-effective alternative to traditional membrane-based electrolyzers. The Tesla valve-based electrolyzer operates at a 30 mL h⁻¹ flow rate and 300 mA cm⁻² current density. this is the lowest pumping power reported in the literature for the mentioned current density. Computational fluid dynamics (CFD) simulation validates its design, indicating how diodicty optimizes bubble separation and minimizes gas crossover. Notably, by utilizing the diodicity effect, the hydrogen production frequency increases by an average of 13% when the cathode is positioned in the lower channel. This work highlights the potential of integrating electrolyzer geometries and fluidic forces to enhance water splitting, paving the way for sustainable hydrogen production.
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