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

Angew Chem Int Ed Engl 2019 Sep 13;58(38):13532-13539. Epub 2019 Aug 13.

School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.

Immobilization of planar Co -2,3-naphthalocyanine (NapCo) complexes onto doped graphene resulted in a heterogeneous molecular Co electrocatalyst that was active and selective to reduce CO 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 CO 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 CO reduction under the identical conditions.

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http://dx.doi.org/10.1002/anie.201906475DOI Listing
September 2019
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References

(Supplied by CrossRef)

Hori et al.
2008

Centi et al.
Catal. Today 2009

Mikkelsen et al.
Energy Environ. Sci. 2010

Qiao et al.
Chem. Soc. Rev. 2014

Seifitokaldani et al.
J. Am. Chem. Soc. 2018

Garza et al.
ACS Catal. 2018

Zheng et al.
J. Am. Chem. Soc. 2019

Jouny et al.
Ind. Eng. Chem. Res. 2018

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