Local microenvironments of the ECO₂RR play an important role in tuning the adsorption energy of crucial intermediates, which helps enhance ECO₂RR selectivity. Different types of organic polymers were used in this work to modify porous Cu NSs to regulate the local microenvironment and enhance the selectivity of the ECO₂RR to C₂H₄. It is found that when porous Cu NSs are modified with anionic polystyrene vinylbenzyl methylimidazolium chloride (PSMIM), the selectivity of C₂H₄ reaches (62.34 ± 1.48)%, while the selectivity of C₂H₄ on the cationic perfluorosulfonic acid polymer Nafion-modified electrode is only (25.41 ± 1.80)%. CO-DRIFTS, in situ ATR-SEIRAS, and molecular dynamics simulation prove that the presence of PSMIM facilitates the adsorption of CO gas and *CO intermediates on the electrode. High *CO coverage is advantageous for the dimerization of *CO, leading to an enhanced selectivity of C₂H₄. Developing PSMIM-Cu NS electrodes is expected to further accelerate the practical application of porous Cu NSs for the ECO₂RR to produce C₂H₄.

中文翻译：

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调节多孔铜纳米片上的局部微环境以提高电催化二氧化碳还原乙烯的选择性

ECO ₂ RR 的局部微环境在调节关键中间体的吸附能方面发挥着重要作用，这有助于提高 ECO ₂ RR 的选择性。这项工作中使用不同类型的有机聚合物来修饰多孔Cu NSs，以调节局部微环境并增强ECO ₂ RR对C ₂ H ₄的选择性。结果表明，用阴离子聚苯乙烯乙烯基苄基甲基咪唑氯化物（PSMIM）修饰多孔Cu NSs时，C ₂ H _{4选择性达到（62.34±1.48）%，而C 2} H ₄对阳离子全氟磺酸聚合物Nafion的选择性达到（62.34±1.48）%。-修饰电极仅为(25.41±1.80)%。 CO-DRIFTS、原位ATR-SEIRAS和分子动力学模拟证明PSMIM的存在有利于CO气体和*CO中间体在电极上的吸附。高*CO覆盖率有利于*CO的二聚化，从而提高C ₂ H ₄的选择性。开发PSMIM-Cu NS电极有望进一步加速多孔Cu NS在ECO ₂ RR生产C ₂ H ₄中的实际应用。