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Linkage Effect in the Heterogenization of Cobalt Complexes by Doped Graphene for Electrocatalytic CO 2 Reduction

Linkage Effect in the Heterogenization of Cobalt Complexes by Doped Graphene for Electrocatalytic CO 2 Reduction

Jiong Wang, Xiang Huang, Shibo Xi, Jong-Min Lee, Cheng Wang, Yonghua Du, Xin Wang

Angew Chem Int Ed Engl. 2019 Sep 16;58(38):13532-13539.

PMID: 31317633

Abstract:

Immobilization of planar CoII -2,3-naphthalocyanine (NapCo) complexes onto doped graphene resulted in a heterogeneous molecular Co electrocatalyst that was active and selective to reduce CO2 into CO in aqueous solution. A systematic study revealed that graphitic sulfoxide and carboxyl dopants of graphene were the efficient binding sites for the immobilization of NapCo through axial coordination and resulted in active Co sites for CO2 reduction. Compared to carboxyl dopants, the sulfoxide dopants further improved the electron communication between NapCo and graphene, which led to the increase of turnover frequency of the Co sites by about 3 times for CO production with a Faradic efficiency up to 97 %. Pristine NapCo in the absence of a graphene support did not display efficient electron communication with the electrode and thus failed to serve as the electrochemical active site for CO2 reduction under the identical conditions.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP26603203	Cobalt(II) 2,3-naphthalocyanine		26603-20-3	Price

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