Details

Autor(en) / Beteiligte

• Hisai, Yudai
• Ma, Quanbao
• Qureishy, Thomas
• Watanabe, Takeshi
• Higo, Takuma
• Norby, Truls
• Sekine, Yasushi

Titel

Enhanced activity of catalysts on substrates with surface protonic current in an electrical field - a review

Ist Teil von

• Chemical communications (Cambridge, England), 2021-06, Vol.57 (47), p.5737-5749

Ort / Verlag

Cambridge: Royal Society of Chemistry

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• It has over the last few years been reported that the application of a DC electric field and resulting current over a bed of certain catalyst-support systems enhances catalytic activity for several reactions involving hydrogen-containing reactants, and the effect has been attributed to surface protonic conductivity on the porous ceramic support (typically ZrO 2 , CeO 2 , SrZrO 3 ). Models for the nature of the interaction between the protonic current, the catalyst particle (typically Ru, Ni, Co, Fe), and adsorbed reactants such as NH 3 and CH 4 have developed as experimental evidence has emerged. Here, we summarize the electrical enhancement and how it enhances yield and lowers reaction temperatures of industrially important chemical processes. We also review the nature of the relevant catalysts, support materials, as well as essentials and recent progress in surface protonics. It is easily suspected that the effect is merely an increase in local vs. nominal set temperature due to the ohmic heating of the electrical field and current. We address this and add data from recent studies of ours that indicate that the heating effect is minor, and that the novel catalytic effect of a surface protonic current must have additional causes. Schematic reaction mechanisms; (A) without an applied electric field, (B) with an applied electric field.