Electrochemical promotion of the CO₂ hydrogenation to CH₄ and CO on a nanodispersed Ru-Co catalyst has been achieved via slurry deposition of the nanodispersed catalyst on an interlayer Ru film deposited on a BZY (BaZr_0.85Y_0.15O₃) proton conducting solid electrolyte disc. The effect of current is nonFaradaic, with Faradaic efficiency values as high as 60 and leads to a reversible variation of the selectivity to CH₄ between 16% and 41%. Due to thermal spillover of protons on the Ru-Co catalyst surface, the open circuit selectivity to CO is quite high, i.e. up to 84% and similar values are obtained via negative potential application, i.e. proton supply to the Ru catalyst film deposited on BZY before the deposition of the nanodispersed catalyst. These results underline the similarity between electrochemical promotion and metal support interactions when using proton conducting supports. They also show the usefulness of electrochemical promotion for mechanistic investigations. The electrochemical promotion of nanodispersed catalysts is a promising step for the practical utilization of electrochemical promotion.

通过将纳米分散的催化剂淤浆沉积在沉积在BZY（BaZr _0.85 Y _0.15 O ₃）质子传导固体电解质上的层间Ru膜上，已实现了在纳米分散的Ru-Co催化剂上将CO ₂氢化成CH ₄和CO的电化学促进。光盘。电流的影响是非法拉第的，法拉第效率值高达60，并导致对CH ₄选择性的可逆变化在16％和41％之间。由于质子在Ru-Co催化剂表面上的热溢出，对CO的开路选择性非常高，即高达84％，并且通过负电势获得相似的值，即向沉积在BZY上的Ru催化剂膜提供质子在沉积纳米分散的催化剂之前。这些结果强调了在使用质子传导载体时电化学促进和金属载体相互作用之间的相似性。他们还显示了电化学促进机制研究的有用性。纳米分散催化剂的电化学促进是电化学促进实际应用的有希望的步骤。