Temperature Effects on CO2 Electroreduction Pathways in an Imidazolium-Based Ionic Liquid on Pt Electrode,The Journal of Physical Chemistry C

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Temperature Effects on CO2 Electroreduction Pathways in an Imidazolium-Based Ionic Liquid on Pt Electrode
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-11-23 , DOI: 10.1021/acs.jpcc.0c06065
Tianrong Zhan _{1,

2} , Anil Kumar ₁ , Michael Sevilla ₁ , Arun Sridhar ₁ , Xiangqun Zeng ₁

Affiliation

Ionic liquids (ILs) are thermally stable at both high and low temperatures, making them excellent solvents and electrolytes in extreme ambient conditions. In this work, we systematically studied the temperature effects on the various pathways of electrochemical reduction of CO₂ in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([Emim][NTf₂]) and compared them with those in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([Bmpy][NTf₂]) by electrochemical methods and density functional calculations. We summarize the crucial factors determining the reaction pathways for electroreduction of CO₂ in [Emim][NTf₂]. Our results show that temperature can be used to modulate the reaction pathway of electrochemical reduction of carbon dioxide in this imidazolium-based IL via the effects on (i) the mass transport of the reactant and intermediates, (ii) the adsorption and solubility of the intermediates species, and (iii) the IL–electrode interface structure and properties.

中文翻译：

Pt电极上咪唑基离子液体对CO ₂电还原途径的温度影响

离子液体（IL）在高温和低温下均具有热稳定性，使其在极端环境条件下成为出色的溶剂和电解质。在这项工作中，我们系统地研究了温度对1-乙基-3-甲基咪唑双（三氟甲基磺酰基）酰亚胺（[Emim] [NTf ₂ ]）中CO ₂电化学还原的各种途径的影响，并将它们与1-丁基-1-甲基吡咯烷鎓双（三氟甲基磺酰基）酰亚胺（[Bmpy] [NTf ₂ ]）的电化学方法和密度泛函计算。我们总结了决定[Emim] [NTf ₂ ]中CO ₂电还原反应途径的关键因素]。我们的结果表明，温度可通过以下方式调节该咪唑基IL中二氧化碳的电化学还原反应途径：（i）反应物和中间体的传质，（ii）吸附和溶解度。中间体种类，以及（iii）IL-电极界面的结构和性质。

更新日期：2020-12-03

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