通过循环伏安法(CV)处理泡沫镍(NF)得到羟基氧化镍(NiOOH)，并以此为前体构建了金纳米聚集体/NF复合催化剂(Au/RF100-NF，RF表示CV处理后表面粗糙化的NF)。NiOOH前体和金纳米聚集体的生成不仅增大了电极的电化学活性面积，同时又增强了电极界面的电荷转移，有利于电催化氧化甘油反应的进行。金纳米聚集体也促进了甘油C—C键的断裂，并显著降低了乳酸盐等C₃产物的法拉第效率(FE)，同时提高了乙醇酸盐和甲酸盐等C₂与C₁产物的FE。最终，通过脉冲电解方式抑制乙醇酸盐进一步转化为甲酸盐。在此条件下，Au/RF100-NF催化乙醇酸盐的FE高达约49.1%，较未预处理直接在NF上沉积金纳米颗粒制备的催化剂(Au/NF)提高了1.67倍。

To achieve efficient catalytic hydrogenation of CO₂ to formate, we employed a transmetallation strategy to develop three novel iridium(Ⅰ) complexes, which feature N-heterocyclic carbene-nitrogen-phosphine ligands (CNP) and a 1, 5-cyclooctadiene (cod) molecule: [Ir(cod)(κ³-CN^imP)]Cl (1-Cl), [Ir(cod)(κ³-CN^imP)]PF₆ (1-PF₆), and [Ir(cod)(κ³-CN^HP)]Cl (2). The ¹H NMR spectra, ³¹P NMR spectra, and high-resolution mass spectra verify the successful synthesis of these three Ir(Ⅰ)-CNP complexes. Furthermore, single-crystal X-ray diffraction analysis confirms the coordination geometry of 1-PF₆. The strong Ir—C(NHC) bond suggests that the carbene carbon plays an enhanced anchoring role to iridium due to its strong σ-donating ability, which helps stabilize the active metal species during CO₂ hydrogenation. As a result, the Ir(Ⅰ)-CNP complex exhibits remarkable activity and long catalytic lifetime for the hydrogenation of CO₂ to formate, reaching a turnover number (TON) of 1.16×10⁶ after 150 h at a high temperature of 170 ℃, which was a relatively high value among all the Ir complexes.