Enhanced methane activation on diluted metal–metal ensembles under an electric field: breakthrough in alloy catalysis

Abstract

Synergy between an electric field and Pd–Zn alloy allows improved catalytic activities in the steam reforming of methane.

Effects of metal cation doping in CeO2 support on catalytic methane steam reforming at low temperature in an electric field

“…The surface electronic/ionic conductivity plays an important role in the reaction in the electric eld. [15][16][17][18] The electronic/ionic conductivity was assessed under dry (Ar) and wet (reaction condition i.e. CH 4 : H 2 O : Ar ¼ 1 : 2 : 7) atmospheres to evaluate the surface proton conduction.…”

“…Our earlier studies [12][13][14][15][16][17][18][19] revealed that application of an electric eld (EF) to Pd, Pt, or Rh catalyst supported on CeO 2 enabled MSR to proceed even at low temperature such as 473 K. Especially in a lower temperature region (T < 600 K), CH 4 conversion exceeded the thermodynamic equilibrium. 15 Furthermore, various experiments were conducted to investigate the reaction mechanism with EF, and the following results were obtained.…”

Recent progress in use and observation of surface hydrogen migration over metal oxides

“…[39][40][41] This active migration is called surface protonics. It has been revealed that surface protonics plays a key role in activating the cleavage of strong bonds, as in the NRN bond in N 2 , [13][14][15][16][17]42,43 and the C-H bond in hydrocarbons, as in CH 4 [42][43][44][45][46] and methylcyclohexane (MCH). 4,5 Those activations make it possible to catalyze hydrogen production and formation of the hydrogen carrier, even at low temperatures (o500 K).…”

Support effects on catalysis of low temperature methane steam reforming

“…In this system, applying a few milliamperes of weak direct current to the catalyst bed can achieve high degrees of methane conversion at considerably lower temperatures (below 500 K), at which conventional MSR proceeds only slightly. [6][7][8][9][10][11][12][13] To elucidate the mechanism of MSR in an electric eld, kinetic analyses were conducted. Manabe et al 7 found that the water pressure dependency on the reaction rate increased from 0.25 to 0.79 and the apparent activation energy decreased from 54.4 kJ mol À1 to 14.3 kJ mol À1 by applying an electric eld.…”