Electrocatalytic Reaction Driven Flow: Role of pH in Flow Reversal.

ABSTRACT: Immobilized bimetallic structures generate fluid flow during electrocatalytic reactions with hydrogen peroxide, which is typically driven from the anodic metal to the cathodic metal similar to an electroosmotic flow. However, under low reactive regimes, the generated flow becomes fully reversed, which cannot be explained by the classical electroosmotic theory. This work aims at unraveling the origin and dynamics of this flow hysteresis through a combined experimental and numerical approach. The key electrocatalytic parameters that contribute to flow reversal are analyzed experimentally and numerically under low reactive regimes induced by bulk pH variations. The proton gradient that initiates chemomechanical actuation is probed with the use of fluorescence lifetime imaging. The fluid flow

SUBMITTER: Ashaju AA 

PROVIDER: S-EPMC8607504 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature