Immobilized electrocatalytic surfaces are capable of generating reaction-driven fluid flow by electrochemical energy conversion. A well-known system concerns the gold-platinum bimetallic motor driven by hydrogen peroxide conversion. In this work, we focus on experimental and numerical analyses that provide fundamental insight on the key elements that control the resulting transport characteristics in this system, including the generated electric field, reaction kinetics, and diffusio-electro-osmotic phenomena. The current between the electrodes and the induced potential that governs the reactive fluxes are measured electrochemically, while the fluid flow is analyzed using particle tracking velocimetry. Numerical simulations based on the Poisson-Nernst-Planck and Navier-Stokes equations reveal the interplay of the individual electrode surface reactivity, represented by the dimensionless Damköhler numbers, with the electrokinetic phenomena.

中文翻译：

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电催化反应驱动流

固定的电催化表面能够通过电化学能量转换产生反应驱动的流体流。众所周知的系统涉及由过氧化氢转化驱动的金-铂双金属电动机。在这项工作中，我们专注于实验和数值分析，以提供对控制该系统中所产生的输运特性的关键元素（包括所产生的电场，反应动力学和扩散电渗现象）的基本了解。用电化学方法测量电极之间的电流和控制电抗性通量的感应电势，同时使用粒子跟踪测速仪分析流体流动。