Surface modification of glassy carbon electrodes (GCEs) with molecular electrocatalysts is an important step towards developing more efficient heterogeneous CO₂ reduction materials. Here, we report direct anodic electrografting of [Ni(alkynyl-cyclam)]²⁺ catalysts to the surface of GCEs in one simple step using inexpensive earth-abundant chemicals. When modified, these electrodes show reversible electrochemistry in organic solvents with zero peak-to-peak separations (ΔE = 0) and non-diffusive I (V) profiles that are typical for heterogeneous redox materials. CPE of these electrodes showed enhanced formation of H₂ gas relative to CO compared to homogeneous catalysts.

中文翻译：

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[Ni（炔基-环酰胺）] ²⁺催化剂与玻璃碳电极的共价结合†

用分子电催化剂对玻璃碳电极（GCE）进行表面改性是开发更有效的异质CO ₂还原材料的重要步骤。在这里，我们报告了使用便宜的地球化学物质在一个简单的步骤中将[Ni（炔基-环酰胺）] ²⁺催化剂直接阳极电接枝到GCE的表面。修改后，这些电极在有机溶剂中显示出可逆的电化学性质，其峰峰间距为零（ΔE = 0），且非扩散性I（V）曲线对于异质氧化还原材料而言是典型的。与均相催化剂相比，这些电极的CPE显示出相对于CO增强了H ₂气体的形成。