Electrochemical reduction of carbon dioxide with a molecular polypyridyl nickel complex†,Sustainable Energy & Fuels

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Electrochemical reduction of carbon dioxide with a molecular polypyridyl nickel complex†
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2018-04-11 00:00:00 , DOI: 10.1039/c8se00027a
Lauren E. Lieske _{1,

2,

3,

4} , Arnold L. Rheingold _{4,

5,

6,

7} , Charles W. Machan _{1,

2,

3,

4}

Affiliation

The synthesis and reactivity of a molecular nickel(II) complex 1 with the polypyridyl ligand framework N,N,N′,N′-tetrakis(2-pyridylmethyl)ethylenediamine (TPEN) under electrochemically reducing conditions in the presence of CO₂ is reported. Cyclic voltammetry (CV), infrared spectroelectrochemistry (IR-SEC) and electrolysis experiments suggest this Ni complex is competent at mediating the two-electron reduction of CO₂ to CO and H₂O with phenol as an added proton donor, but is subsequently prone to rapid degradation as Ni(CO)₄. This deleterious pathway was shown to be mitigated by the inclusion of the CO scavenger [Ni(TMC)]²⁺, although this requires stoichiometric inclusion for each catalyst turnover and does not significantly improve the observed catalytic current densities.

中文翻译：

用分子聚吡啶镍配合物电化学还原二氧化碳†

据报道，在电化学还原条件下，在CO ₂存在下，分子镍（II）配合物1与聚吡啶基配体骨架N，N，N '，N'-四（2-吡啶基甲基）乙二胺（TPEN）的合成和反应性。循环伏安法（CV），红外光谱电化学（IR-SEC）和电解实验表明，该Ni配合物能以酚作为添加的质子供体，介导将CO ₂还原为CO ₂和H ₂ O的两电子还原，但随后容易发生迅速降解为Ni（CO）₄。该有害途径显示出通过包含CO清除剂[Ni（TMC）] ²⁺得以缓解，尽管这对于每种催化剂周转量都需要化学计量的加入，并且并不能显着提高所观察到的催化电流密度。

更新日期：2018-04-11

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