Abstract
Metal phthalocyanines molecular catalysts exhibit the unique ability of CO 2 electrochemical reduction reaction (CO 2ERR) thanks to their well-defined macrocycle structure. In this work, we introduced different substituting functional groups at the phthalocyanine ring of cobalt phthalocyanine to study the relationship of molecular structure optimization and CO 2ERR activity. An optimal nitro-substituted cobalt phthalocyanine catalyst can mediate CO 2 to CO in a H-cell with maximum selectivity of ∼94% together with a current density of 12.6 mA cm −2 at −0.877 V vs. RHE. The insights of this work on designing and optimizing of the molecular catalysts contribute to lower energy as well as cost-effective CO 2ERR.
Original language | English |
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Article number | 131482 |
Journal | Materials Letters |
Volume | 310 |
Early online date | 16 Dec 2021 |
DOIs | |
Publication status | Published - 1 Mar 2022 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2021 Elsevier B.V.
Funding
This work was supported by the National Natural Science Foundation of China (62004155, 12002271, and 11872302); Scientific Research Project of Shaanxi Provincial Department of Education (20JK0714); Xi'an Science and Technology Plan Project, China (2019220914SYS024CG046).
Keywords
- CO reduction reaction
- Cobalt phthalocyanine
- Electronic effect
- Molecular catalyst