A series of Ce-promoted nickel supported activated carbon (NiCe_xC) catalysts with different molar contents of Ce (0, 0.5 %, 1 %, 3 % and 5 %) were synthesized via a wetness co-impregnation method. Catalytic activity of CO₂ dry reforming of methane (DRM) was evaluated in a non-thermal plasma (NTP)-catalytic reactor. Experimental results showed that the introduction of CeO₂ could promote the NTP-catalytic DRM reaction. Specifically, NiCe₁C catalyst was regarded as the best one due to its excellent conversion of CO₂ (53.7 %) and CH₄ (55.6 %), as well as a prominent selectivity of H₂ (50.0 %) and CO (53.2 %). Moreover, it was also found that NiCe₁C could achieve the highest energy efficiency (0.59 mmol kJ⁻¹) compared with NiCe₀C (0.52 mmol kJ⁻¹). A strong dual-metals interaction between Ni and CeO₂ was found to inhibit the growth of Ni particle, and improve the dispersion of Ni nanoparticles (NPs), thereby the activation energy of CH₄ was reduced due to the size effect. The addition of CeO₂ created more basic sites with stronger basicity of the catalyst, which was beneficial to increase the adsorption capacity of the reactants, especially the acidic gas CO₂. Thus, the conversion of CO₂ and CH₄ were further improved. Besides, the formation of coke deposition and the participation of carbon support in the reaction could be avoided by controlling CH₄/CO₂ ratio in the feed gases.

通过湿法共浸渍法合成了一系列不同铈含量（0、0.5 ％，1％，3％和5％）的铈促进的镍负载活性炭（NiCe _x C）催化剂。在非热等离子体（NTP）催化反应器中评估了CO ₂甲烷干重整（DRM）的催化活性。实验结果表明，加入CeO ₂可以促进NTP催化DRM反应。具体而言，NiCe ₁ C催化剂因其出色的CO ₂（53.7％）和CH ₄（55.6％）的转化率以及H ₂的出色选择性而被认为是最好的催化剂。（50.0％）和一氧化碳（53.2％）。此外，还发现，尼斯₁ C可达到最高的能效（0.59毫摩尔千焦耳^-1）与漂亮相比₀ C（0.52毫摩尔千焦^-1）。发现Ni和CeO ₂之间的强双金属相互作用抑制Ni颗粒的生长，并改善Ni纳米颗粒（NP）的分散，从而由于尺寸效应而降低了CH ₄的活化能。CeO ₂的添加产生了更多的碱性位点，催化剂的碱性更强，这有利于增加反应物特别是酸性气体CO ₂的吸附能力。因此，CO ₂的转化和CH ₄进一步改善。此外，通过控制进料气中的CH ₄ / CO ₂比，可以避免焦炭沉积的形成和碳载体参与反应。