Volume 229, 2021

Reaction mechanism of low-temperature catalysis by surface protonics in an electric field

Abstract

The process of combining heterogeneous catalysts and direct current (DC) electric fields can achieve high catalytic activities, even under mild conditions (<500 K) with relatively low electrical energy consumption. Hydrogen production by steam reforming of methane, aromatics and alcohol, dehydrogenation of methylcyclohexane, dry reforming of methane, and ammonia synthesis are known to proceed at low temperatures in an electric field. In situ/operando analyses are conducted using IR, Raman, X-ray absorption fine structure, electrochemical impedance spectroscopy, and isotopic kinetic analyses to elucidate the reaction mechanism for these reactions at low temperatures. The results show that surface proton hopping by a DC electric field, called surface protonics, is important for these reactions at low temperatures because of the higher surface adsorbate concentrations at lower temperatures.

Graphical abstract: Reaction mechanism of low-temperature catalysis by surface protonics in an electric field

Associated articles

Article information

Article type
Paper
Submitted
08 dic. 2019
Accepted
14 ene. 2020
First published
26 mar. 2020

Faraday Discuss., 2021,229, 341-358

Author version available

Reaction mechanism of low-temperature catalysis by surface protonics in an electric field

Y. Sekine and R. Manabe, Faraday Discuss., 2021, 229, 341 DOI: 10.1039/C9FD00129H

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