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

Abstract

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...

Quantifiable models for surface protonic conductivity in porous oxides – case of monoclinic ZrO2

“…2 Surface protonic conduction in water adsorbed in porous nano-grained ceramics has more recently received renewed interest as potential electrolytes for fuel cells, [3][4][5] while it is also realised that it plays significant roles in kinetics of catalysts, photocatalysts, and electrocatalysts. 6,7 Surface protonics is particularly well studied for pure and doped dioxides of tetravalent cations. Much of our present knowledge on the adsorption of water and surface protonics in porous nano-grained ceramic oxides stems from studies of undoped monoclinic and cubic ZrO 2 , [8][9][10][11] and cubic Y-stabilised ZrO 2 (YSZ).…”

“…2 Surface protonic conduction in water adsorbed in porous nano-grained ceramics has more recently received renewed interest as potential electrolytes for fuel cells, 3–5 while it is also realised that it plays significant roles in kinetics of catalysts, photocatalysts, and electrocatalysts. 6,7…”

Evaluating the effects of OH-groups on the Ni surface on low-temperature steam reforming in an electric field

“…Therefore, it is clear that ER activity can occur irrespective of the electronic state of Ni, supporting the conventional low-temperature catalytic reaction mechanism by the surface protonics. [15][16][17] Because YSZ is also a proton conductor, it is useful as an interface between the support and the active metal irrespective of its electronic state. The ER activity of Ni-doped YSZ was regarded as occurring in the presence of an interface between the catalyst support and the active metal.…”

Bimetallic Iron–Cobalt Nanoparticles Coated with Amorphous Carbon for Oxygen Evolution

“…10 Therein, iron (Fe)-, cobalt (Co)-, and nickel (Ni)-based nanocatalysts have been extensively researched for OER because of their high abundance and relatively low cost. 11 Especially, bimetallic Fe−Co-based and Fe−Ni-based nanocatalysts exhibit enhanced OER activity compared with monometallic counterparts, which are promising candidates used in alkaline electrolysis of water. 12 However, the controllable fabrication of bimetallic electrocatalysts with the uniform dispersion of different metal ions is still challenging.…”

“…Transition-metal-based catalysts are active for OER, such as transition-metallic carbides, chalcogenides, nitrides, phosphides, and (oxy)­hydroxides . Therein, iron (Fe)-, cobalt (Co)-, and nickel (Ni)-based nanocatalysts have been extensively researched for OER because of their high abundance and relatively low cost . Especially, bimetallic Fe–Co-based and Fe–Ni-based nanocatalysts exhibit enhanced OER activity compared with monometallic counterparts, which are promising candidates used in alkaline electrolysis of water .…”