A new electrochemical cell with a uniformly accessible electrode to study fast catalytic reactions

Abstract

The electrochemical study of fast catalytic reactions is limited by mass transport using the conventional electrochemical cell with a rotating disk electrode (RDE).

Optimizing the mass transport of wall-tube electrodes for protein film electrochemistry

“…Figure 1 represents a schematic view of the experimental setup, similar to the one we have used in our previous work [21]. The fluid comes through the inlet in the center of the scheme (orange downward arrow), impinges on the working electrode (the gray area at the bottom) and is evacuated via symmetric outlets that are initially inclined with respect to the vertical axis (blue upward arrows).…”

“…in which j is the flux of species at the electrode, c(∞) the concentration of species in the upstream flow and c(0) the concentration of species at the electrode (in our case, c(0) = 0). In contrast to our previous work [21], we simplified the 3D design into a 2D design with a rotational invariance, which provided both finer grained results, less discretization artifacts, and faster computation time. We show in supplementary section S2 (and figure S3) that the two models predict the same flux within less than 10% for values of r between 0 and at least the value of the inlet radius.…”

“…After an initial screening of a number of geometries using computational fluid dynamics, we have recently proposed a design based on wall-tube electrodes [21], which provides a factorof-three improvement with respect to the classical RDE setup (assuming a rotation rate of 5000 rpm). However, in our previous work, we relied only on computational fluid dynamics simulations to predict the mass transport in given conditions.…”

“…In this work, we have developed semi-empirical formulas suitable to predict the mass-transport properties and the shear stress for wall-tube cells such as the one we have previously proposed [21]. We have used an approach based on computational fluid dynamics, using first a systematic sensitivity study to determine the most influencing parameters, and then focusing on them to propose an analytical formula that reproduces our data within 10%.…”

Oriented external electric fields regulating the oxidation reaction of CH4 catalyzed by Mn‐corrolazine

“…Searching for novel and efficient catalysts has always been the most important subject in chemical research. Traditionally, the common catalysts are molecules and the surfaces or interface in homogeneous and heterogeneous systems, [ 1–6 ] respectively. However, in recent years, many new technologies, such as ultrasound, [ 7 ] microwaves, [ 8 ] mechanical stress, [ 9 ] and nanoreactors, [ 10 ] have been used to control various reaction processes as novel catalysts.…”