Reaction mechanism of low-temperature catalysis by surface protonics in an electric field
The process combining heterogeneous catalysts and DC electric field can achieve high catalytic activities, even under mild conditions (<500 K) with less 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 have been conducted using IR, Raman, XAFS, electrochemical impedance spectroscopy, and isotopic kinetic analyses to elucidate the reaction mechanism for these reactions at low temperatures. Results show that surface proton hopping by a DC electric field, called surface protonics, is important for these reactions at low temperatures because of higher surface adsorbate concentrations at lower temperatures.
- This article is part of the themed collection: Reaction mechanisms in catalysis