Publications by authors named "Diankai Qiu"
Article Synopsis
- - The proton exchange membrane water electrolyzer (PEMWE) has potential for hydrogen production but faces challenges at high current densities due to inadequate understanding of oxygen transport processes.
- - In situ x-ray imaging was used in a special mini-cell to observe how bubbles behave during oxygen evolution, revealing that the process involves bubble nucleation, growth, and detachment.
- - Research identified critical current densities for different porous transport layers, where exceeding these limits leads to unstable cell voltage and increased oxygen overpotential, introducing the concept of an interfacial separation zone (ISZ) that facilitates bubble dynamics.
Comprehensive Analysis of the Gradient Porous Transport Layer for the Proton-Exchange Membrane Electrolyzer.
ACS Appl Mater Interfaces
September 2024
A reasonable porous transport layer (PTL) is crucial to decreasing the mass-transfer loss in proton-exchange membrane water electrolyzers (PEMWEs). In this study, it was experimentally demonstrated that the gradient porosity PTL is beneficial in improving the performance of electrolyzers. The research comprehensively investigates the impact of gradient porosity PTL structures on the performance of the PEMWE, considering mass transfer and interfacial contact.
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