Abstract Pyrolyzing Cu(II) precursors absorbed on carbon black gave an eletrocatalytic material for the electroreduction of CO2. Controlled potential electrolysis and GC analysis revealed an unexpected selectivity towards methane even in alkaline media, with a methane Faradaic efficiency as high as 42%, a partial current density of 100 mA/cm2 (at −1 V vs. RHE) and a methane/ethylene ratio of 4:1. XPS, EXAFS, and EDX mapping results indicate a single-site Cu(I) center as the catalytically active site. The limited size of the active sites is believed to be crucial for the preferential formation of methane over ethylene.

中文翻译：

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用于将 CO2 电还原为甲烷的高度分散的单中心铜催化剂

摘要 吸附在炭黑上的热解 Cu(II) 前驱体提供了一种用于电还原 CO2 的电催化材料。可控电位电解和 GC 分析显示，即使在碱性介质中也对甲烷具有意想不到的选择性，甲烷法拉第效率高达 42%，部分电流密度为 100 mA/cm2（在 -1 V vs. RHE）和甲烷/乙烯比例为4:1。XPS、EXAFS 和 EDX 映射结果表明单点 Cu(I) 中心作为催化活性位点。据信，活性位点的有限尺寸对于优先形成甲烷而不是乙烯至关重要。