Experimental and Theoretical Investigation of the Mechanism of the Reduction of O<sub>2</sub> from Air to O<sub>2</sub><sup>2–</sup> by V<sup>IV</sup>O<sup>2+</sup>–<i>N</i>,<i>N</i>,<i>N</i>-Amidate Compounds and Their Potential Use in Fuel Cells
作者:Michael Papanikolaou、Sofia Hadjithoma、Odysseas Keramidas、Chryssoula Drouza、Angelos Amoiridis、Alexandros Themistokleous、Sofia C. Hayes、Haralampos N. Miras、Panagiotis Lianos、Athanassios C. Tsipis、Themistoklis A. Kabanos、Anastasios D. Keramidas
DOI:10.1021/acs.inorgchem.3c03272
日期:2024.2.19
the great importance of vanadium(IV) species to activate the two-electron reductive activation of O2, the mechanism is still unclear. Reaction of VIVO2+ species with the tridentate-planar N,N,N-carboxamide (ΗL) ligands in solution (CH3OH:H2O) under atmospheric O2, at room temperature, resulted in the quick formation of [VV(═O)(η2-O2)(κ3-L)(H2O)] and cis-[VV(═O)2(κ3-L)] compounds. Oxidation of the VIVO2+
O 2到 O 2 2–的双电子还原活化引起了科学界的特别关注,这主要是由于过氧化物作为绿色氧化剂和在强大的燃料电池中的使用。尽管钒(IV)物质对于激活O 2的双电子还原活化非常重要,但其机制仍不清楚。 V IV O 2+物质与三齿平面N,N,N-甲酰胺 (HL) 配体在溶液 (CH 3 OH:H 2 O) 中在大气 O 2下在室温下反应,导致快速形成[V V (=O)(η 2 -O 2 )(κ 3 -L)(H 2 O)]和顺式-[V V (=O) 2 (κ 3 -L)]化合物。 V IV O 2+配合物与空间位阻三齿平面N,N,N-甲酰胺配体被大气O 2氧化仅得到顺式-[V V (=O) 2 (κ 3 -L)]化合物。 [V V (=O)(η 2 -O 2 )(κ 3 -L)(H 2 O)] (I) 和顺式-[V V (=O) 2 (κ 3 -L) 的形成机制)] (II) 配合物与时间的关系,通过