Metals and their alloy-based electrocatalysts continue to attract considerable attention for electrochemical carbon dioxide reduction reactions (CO₂RRs). In this work, cuprous oxide (Cu₂O) was supported on N-doped flexible roughed graphite paper (NGP) to fabricate Cu₂O/NGP self-supporting electrocatalysts for CO₂RRs by electrodeposition and heat treatment. In the Cu₂O/NGP electrocatalyst, NGP acted as a current collector and conducting channel, which can effectively transfer electrons from the active sites of Cu₂O to NGP, and thus, enhance the catalytic performance of Cu₂O/NGP for CO₂RRs. The overall Faradaic efficiency of Cu₂O/NGP for CO₂RRs reached 96% at −0.9 V vs. reversible hydrogen electrode, of which 35% originated from yielding ethylene (C₂H₄), suggesting its high activity and C₂H₄ selectivity. Furthermore, the excellent stability of Cu₂O/NGP over 10 h made it preferable as an effective electrocatalyst for CO₂RRs. The good electrocatalytic performance could be attributed to the unique self-supporting structure and the synergetic effect between Cu₂O and NGP.

中文翻译：

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在粗化石墨纸上原位生长具有蜂窝结构的 Cu2O 以将 CO2 有效电还原为 C2H4

金属及其合金基电催化剂在电化学二氧化碳还原反应 (CO ₂ RR) 方面继续引起相当大的关注。在这项工作中，氧化亚铜 (Cu ₂ O) 负载在 N 掺杂的柔性粗石墨纸 (NGP) 上，通过电沉积和热处理制备了用于 CO ₂ RRs 的Cu ₂ O/NGP 自支撑电催化剂。在 Cu ₂ O/NGP 电催化剂中，NGP 作为集流体和导电通道，可以有效地将电子从 Cu ₂ O的活性位点转移到 NGP，从而提高 Cu ₂ O/NGP 对 CO的催化性能_{2 个}RR。Cu的整体法拉第效率与可逆氢电极相比，CO ₂ RRs 的₂ O/NGP在 -0.9 V 时达到 96%，其中 35% 来自产生乙烯 (C ₂ H ₄ )，表明其高活性和 C ₂ H ₄选择性。此外，Cu ₂ O/NGP 在 10 小时内的优异稳定性使其成为 CO ₂ RRs的有效电催化剂。良好的电催化性能归因于独特的自支撑结构以及Cu ₂ O与NGP之间的协同作用。