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首页> 外文期刊>Advanced functional materials >Bio-inspired Porous Composite Electrode for Enhanced Mass Transfer and Electrochemical Water Purification by Modifying Local Flow Pattern
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Bio-inspired Porous Composite Electrode for Enhanced Mass Transfer and Electrochemical Water Purification by Modifying Local Flow Pattern

机译：Bio-inspired Porous Composite Electrode for Enhanced Mass Transfer and Electrochemical Water Purification by Modifying Local Flow Pattern

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摘要

Porous electrodes offer a new opportunity for flow-through electrochemicalwater purification, but their irregular porous-structure makes the local flowpattern and mass transfer performance inhomogeneous, unpredictable, anduncontrollable. In this study, a bio-inspired design is reported for porouselectrode by learning the micro-scale architectures of the wings of butterflyand owl based on analogy between heterogeneous mass transfer and soundabsorption. Results demonstrate that combining gyroid and perforated platecan produce strong periodic vortex and inertial flow in interpenetrating channelseven at laminar flow region. This enables homogeneous, predictableand controllable flow patterns and enhanced mass transfer, which can beexplained by uniformity analysis and physical field synergy. Based on experimentaltests on Cu electrode fabricated by selective laser melting, the compositegyroid electrode generates the limiting current density of 83% higherthan random porous-structured electrode, accounting for nitrate removal ashigh as 95% by electrochemical denitrification. This study represents a paradigmshift to advance design for porous architectures by learning experiencesof hydrodynamic behaviors from nature. In this way, it is feasible to enhancemass transfer by modifying local flow patterns on pore scale, which may havebroader implications that extend to other heterogeneous reaction systems.

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