Covalently anchoring cobalt phthalocyanine on zeolitic imidazolate frameworks for efficient carbon dioxide electroreduction

• Published in: CrystEngComm Vol. 22; no. 9; pp. 1619 - 1624
• Main Authors: Yang, Zhongjie, Zhang, Xiaofei, Long, Chang, Yan, Shuhao, Shi, Yanan, Han, Jianyu, Zhang, Jing, An, Pengfei, Chang, Lin, Tang, Zhiyong
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 07.03.2020
• Subjects: Anchoring; Aqueous solutions; Carbon dioxide; Carbon monoxide; Carbon sequestration; Catalysts; Chemical synthesis; Cobalt; Conversion; Coupling (molecular); Efficiency; Imines; Metal-organic frameworks; NMR; Nuclear magnetic resonance; Substrates; Zeolites
• ISSN: 1466-8033; 1466-8033
• DOI: 10.1039/c9ce01517e

Transformation of CO 2 into fuels has drawn great attention due to increasing carbon emission in recent years. Coupling metal-organic frameworks (MOFs) with molecular catalysts is a promising technique for boosting the efficiency of carbon dioxide capture and conversion. Herein, a CoTAPc-ZIF-90 hybrid catalyst is synthesized by decorating cobalt phthalocyanine on the outer surface of ZIF-90 through a Schiff base reaction. We demonstrate that the ZIF-90 substrate can cooperate with the cobalt active center to boost the electrocatalytic CO 2 reduction performance. CoTAPc-ZIF-90 shows a large current density of 13 mA cm −2 for effective conversion of CO 2 into CO in aqueous media at an overpotential of 0.86 V with a faradaic efficiency (FE) of 90%. What's more, the CoTAPc-ZIF-90 hybrid catalyst exhibits significantly higher catalyst stability compared with the free phthalocyanine molecule. Transformation of CO 2 into fuels has drawn great attention due to increasing carbon emission in recent years.