Abstract Carbon-metal hybrid materials have shown promising performance as electrocatalysts for CO2 reduction. Here, a comparative study of how different carbons supports influence this reaction is presented. The tested carbon supports were graphene oxide, multi-walled carbon nanotubes, carbon black and activated carbon while the metal complex selected was copper(II) phthalocyanine (CuPc). The CuPc supported on carbon nanotubes (CNT) and carbon black were found to give higher faradaic efficiencies (FE) for reduced carbon products, i.e. 66.3% and 81.8%, respectively compared to graphene oxide (0.0%) and activated carbon (12.8%). Amongst various sizes of CNT, long and thin tubes (in the range of 10–30 nm diameter size, 10–30 μm length) demonstrated higher FE (66.3%) relative to shorter and thicker ones (7.4%). Additionally, the novel use of CNT synthesized from post-consumer plastic waste was also explored as a potential carbon support material. It demonstrated comparable performance to commercial CNT in terms of FE (70.4%).

中文翻译：

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用于电化学 CO2 还原的碳基铜 (II) 酞菁催化剂：碳载体对电催化活性的影响

摘要 碳-金属杂化材料作为 CO2 还原电催化剂显示出良好的性能。在这里，介绍了不同碳载体如何影响该反应的比较研究。测试的碳载体是氧化石墨烯、多壁碳纳米管、炭黑和活性炭，而选择的金属配合物是铜（II）酞菁（CuPc）。研究发现，与氧化石墨烯 (0.0%) 和活性炭 (12.8%) 相比，碳纳米管 (CNT) 和炭黑上负载的 CuPc 为还原碳产品提供了更高的法拉第效率 (FE)，即分别为 66.3% 和 81.8% . 在各种尺寸的 CNT 中，长管和细管（直径 10-30 纳米，长度 10-30 微米）相对于更短和更厚的管（7.4%）表现出更高的 FE（66.3%）。此外，还探索了从消费后的塑料废物中合成的 CNT 作为潜在碳载体材料的新用途。它在 FE (70.4%) 方面表现出与商业碳纳米管相当的性能。