钴酞菁/多孔碳气凝胶复合结构用于高效电催化CO2还原

doi:10.19286/j.cnki.cci.2023.11.031

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Abstract Electrocatalytic CO2 reduction into high value-added fuels or chemicals by renewable energy to achieve the “carbon neutrality and peak” is attractive, but still challenged by developing high-performance electrocatalytic catalysts for electrocatalytic CO2 reduction reaction (CO2RR). Herein, porous nitrogen-doped carbon aerogels (N-CA) with “coral-like” structure was designed as the substrate to optimize gas mass transfer, and cobalt phthalocyanine (CoPc) was stabilized on N-CA surface by non-covalent immobilization technology to obtain CoPc@N-CA, realizing the stable combination of active sites and conductive carbon skeleton. As a result, CoPc@N-CA exhibits excellent CO2RR activity, CO Faradaic efficiency (FECO) 80% at the wide potential window of -0.5 to -1.0 V vs. RHE, and the maximal FECO of 99.05%. Meanwhile, CoPc@N-CA reaches a high CO partial current density (jCO) of 14.40 mA·cm-2 at -0.85 V vs. RHE, which is close to 4 times of that of CoPc@CB (3.66 mA·cm-2), where carbon black (CB) was chosen as substrate to obtain CoPc@CB. Intrinsic activity analysis illustrates that the excellent activity of CoPc@N-CA can be attributed to the unique porous structure of N-CA, which not only promotes the mass transfer of CO2 molecules, but also facilitates the reaction kinetics of CO2RR, and exposes the active sites of Co, promoting the activity CO2RR.

Key words： electrocatalytic CO2 reduction carbon aerogel heterogeneous molecular catalyst CO product

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	Articles by authors
	Zhou Tun1
	Gong Shanhe2
	Lv Xiaomeng3
	Feng Yuxiang1
	Huang Chunxia4
	Zhu Guisheng4

Cite this article:

Zhou Tun1,Gong Shanhe2,Lv Xiaomeng3等. Cobalt phthalocyanine/porous carbon aerogel composite for efficient electrocatalytic CO2 reduction[J]. CCI, 2023, 46(11): 132-140，156..

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http://www.mtyhg.com.cn/EN/10.19286/j.cnki.cci.2023.11.031 OR http://www.mtyhg.com.cn/EN/Y2023/V46/I11/132

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