李正名院士是我国著名的教育家、化学家和农药学家。在李先生逝世3周年之际，李正名奖学金捐赠暨首届颁奖仪式在南开大学举行。本文结合一部分典型的具体事例，对李正名先生的教育家精神和科学家精神进行了介绍，从中折射出他始终如一的坚定爱国信念和无私奉献精神。青年学子通过学习李先生的光辉事迹，可以深入了解老一辈科学家浓厚的家国情怀。本文有助于激励当代大学生厚植爱国主义理想与信念，增强自主创新意识和能力，立志为中华民族的伟大复兴贡献自己的全部力量。

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.

To develop highly stable and active Ru complex catalysts for CO₂ hydrogenation, we synthesized Ru complexes bearing rigid pincer-type tridentate NNN (pyrazole-pyridine-pyrazole) ligands and weakly coordinated triphenylphosphine (PPh₃) ligands. The NNN ligands can strongly chelate with the Ru metal center, contributing to the overall robustness of the catalytic system. Meanwhile, PPh₃ can easily dissociate to form vacant coordination sites, thereby enhancing catalytic activity. As a result, the Ru(Ⅱ)-NNN complex [Ru(L-NNN)Cl(PPh₃)₂]Cl (1, L-NNN=2,6-bis(5-methyl-1H-pyrazol-3-yl)pyridine) was not only quite stable, but also showed high activity for CO₂ hydrogenation to formate, achieving a TON of up to 150 000. In the mechanism study, based on the results of in-situ NMR, in-situ HPLC-HRMS spectra, and density functional theory calculations, it is speculated that the active intermediates with empty coordination sites are highly active species in CO₂ hydrogenation.