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CO2 Reduction Pathways on MnBr(N-C)(CO)3 Electrocatalysts

机译:CO 2 在MNBR(N-C)(CO) 3 电催化剂上的途径

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摘要

MnBr( N -ethyl- N ′-2-pyridylimidazol-2-ylidine)(CO)_(3) reduces CO_(2) to CO in the absence of strong acids. Herein, we employ density functional theory and domain based local pair natural orbital coupled cluster theory to perform the first mapping of the catalytic pathway for this catalyst and various derivatives. The benzimidazole-containing derivative proceeds along the same pathway as its parent complex, but with an increased barrier to H~(+) reduction. The phenolated complex shows barrierless CO_(2) addition to the activated catalyst and facile C–O bond cleavage. All species exhibit a novel pyridine dissociation upon one-electron reduction of the tetracarbonyl species, but the active tricarbonyl catalysts can be regenerated with a small barrier. This novel step in the pathway presents a further consideration in the design of catalysts and provides insight into the potential degradation pathways of this catalyst.
机译:MNBR(N-乙基-2-2-吡啶基咪唑-2- ylidine)(CO)_(3)在不存在强酸的情况下减少CO_(2)。 在此,我们采用密度函数理论和基于结构域的局部对天然轨道耦合簇理论,以进行该催化剂和各种衍生物的催化途径的第一映射。 含苯并咪唑的衍生物作为其亲本复合物沿相同的途径进行,但是对H〜(+)的势垒增加。 酚类复合物显示出活性催化剂的阻隔股(2)除了加强的C-O键裂解。 所有物种在四羰基物种的单电子还原时表现出新的吡啶解离,但是活性三羰基催化剂可以用小屏障再生。 该途径中的这种新颖的步骤在于催化剂的设计进一步考虑,并提供了对该催化剂的潜在降解途径的洞察。

著录项

  • 来源
    《Organometallics》 |2018年第3期|共6页
  • 作者单位

    Center for Computational Quantum Chemistry University of Georgia Athens Georgia 30602 United States;

    Center for Computational Quantum Chemistry University of Georgia Athens Georgia 30602 United States;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 元素有机化合物;
  • 关键词

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