Synergistic Interaction of Nitrogen-Doped Carbon Nanorod Array Anchored with Cobalt Phthalocyanine for Electrochemical Reduction of CO2,ACS Applied Energy Materials

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Synergistic Interaction of Nitrogen-Doped Carbon Nanorod Array Anchored with Cobalt Phthalocyanine for Electrochemical Reduction of CO2
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-04-14 00:00:00 , DOI: 10.1021/acsaem.0c00306
Hong-Lin Zhu ₁ , Yue-Qing Zheng ₁ , Miao Shui _{1,

2}

Affiliation

Electrochemical conversion of CO₂ into valuable product is regarded as an attractive approach to fix and utilize atmospheric CO₂, but it has been hampered due to small current density, poor selectivity, and poor durability of catalyst. Herein, a 3D nanoarrays, cobalt phthalocyanine anchored by a N-doped porous carbon nanorod (N–C–CoPc NR), is designed as an excellent electrocatalyst for efficient electrochemical reduction of CO₂ into CO. The prepared N–C–CoPc NR structure not only strengthens the electron transfer rate but also exposes more active sites, which could be greatly improve the stability and activity for electrochemical CO₂ reduction. The N–C–CoPc NR exhibits an excellent overall current density of 30 mA/cm² and a lower overpotential of 180 mV for CO₂ reduction to CO in 0.1 M KHCO₃ electrolyte, and the maximal faradaic efficiency for CO at −0.7 V vs RHE is 85.3% with an excellent stability. The theoretical calculations confirm that cobalt phthalocyanine is the dominating active center for intermediate *COOH formation as well as the CO desorption.

中文翻译：

酞菁钴锚固氮掺杂碳纳米棒阵列的协同相互作用，电化学还原CO ₂

CO ₂电化学转化为有价值的产品被认为是固定和利用大气中CO _2的一种有吸引力的方法，但是由于电流密度小，选择性差和催化剂的耐久性差而受到阻碍。在此，设计了一种3D纳米阵列，即用N掺杂的多孔碳纳米棒（NC-CoPc NR）锚固的酞菁钴，它是将CO ₂有效电化学还原为CO的极佳电催化剂。结构不仅增强了电子传递速率，而且暴露了更多的活性位，可以大大提高电化学还原CO ₂的稳定性和活性。N–C–CoPc NR表现出出色的总电流密度，为30 mA / cm ²在0.1 M KHCO ₃电解液中，CO ₂还原为CO的过电位较低，为180 mV ，-0.7 V vs RHE时，CO的最大法拉第效率为85.3％，具有出色的稳定性。理论计算证实，酞菁钴是中间体* COOH形成以及CO解吸的主要活性中心。

更新日期：2020-04-14

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