Journal Article

Low Temperature Catalytic Water Gas Shift in an Electric Field

Sekine, Yasushi, Nogami, Yukako, Yamagishi, Kodai, Oshima, Kazumasa, Manabe, Ryo, Ogo, Shuhei

2016

Overview

Catalytic water gas shift for hydrogen production in the temperature range of 423–873 K, was examined imposing an electric field to the catalyst bed. Reaction trends were investigated based on thermodynamic equilibrium and chemical kinetic law. Pt/La–ZrO 2 was chosen as an active catalyst through our screening tests, and the effect of the electric field on the catalytic activity was investigated by changing reaction temperatures and applied electric currents. Although the reaction was ruled by thermodynamic equilibrium at high temperatures, drastic promotion of the reaction by applying the electric field was observed at low temperatures in a kinetic region. Drastic decrease of apparent activation energy for WGS was observed by imposing the electric field to the catalyst bed. Various isotopic transient tests revealed that the reaction mechanism changed by the application of electric field, and redox mechanism using surface lattice oxygen played an important role in case of the catalytic WGS in the electric field. Graphical Abstract

• Publisher: Springer US,Springer,Springer Nature B.V
• Subject: Activation energy / Catalysis / Catalysts / Catalytic activity / Chemical reaction, Rate of / Chemistry / Chemistry and Materials Science / Electric fields / Hydrogen / Hydrogen production / Industrial Chemistry/Chemical Engineering / Low temperature / Organic chemistry / Organometallic Chemistry / Physical Chemistry / Reaction mechanisms / Thermodynamic equilibrium / Thermodynamics / Water gas / Zirconium dioxide