The electrochemical reduction of carbon dioxide (CO₂RR) has attracted enormous interest because of the energy crisis and climate change; however, more efficient catalysts are required for practical applications. Herein, we present electrospinning as a facile strategy to synthesize a three-dimensional network of carbon nanofibers embedded with Cu and CeO₂ nanoparticles (Cu/CeO_x@CNFs) as a CO₂RR catalyst. The Cu–CeO_x interface produced using this method offers synergistic geometric and electronic effects which optimize the adsorption strength of reaction intermediates for the electroreduction of CO₂ to CO. In a flow cell configuration, a current density of 100 mA cm^-2 and a CO faradaic efficiency of 59.2% can be obtained at -0.60 V vs. RHE.

由于能源危机和气候变化，二氧化碳的电化学还原（CO ₂ RR）引起了极大的兴趣。然而，实际应用中需要更有效的催化剂。在这里，我们提出静电纺丝作为一种简便的策略，以合成嵌入有作为CO ₂ RR催化剂的Cu和CeO ₂纳米颗粒（Cu / CeO _x @CNFs）的碳纳米纤维的三维网络。使用此方法生产的Cu–CeO _x界面提供了协同的几何和电子效应，可优化用于将CO ₂电还原为CO的反应中间体的吸附强度。在流通池配置中，电流密度为100 mA cm ^-2 在-0.60 V vs. RHE的条件下，CO法拉第效率为59.2％。