Volume 58, Issue 31 pp. 10677-10682
Communication

A Phthalocyanine-Based Layered Two-Dimensional Conjugated Metal–Organic Framework as a Highly Efficient Electrocatalyst for the Oxygen Reduction Reaction

Dr. Haixia Zhong

Dr. Haixia Zhong

Faculty of Chemistry and Food Chemistry & Center for Advancing Electronics Dresden, Technische Universität Dresden, 01062 Dresden, Germany

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Dr. Khoa Hoang Ly

Dr. Khoa Hoang Ly

Faculty of Chemistry and Food Chemistry & Center for Advancing Electronics Dresden, Technische Universität Dresden, 01062 Dresden, Germany

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Mingchao Wang

Mingchao Wang

Faculty of Chemistry and Food Chemistry & Center for Advancing Electronics Dresden, Technische Universität Dresden, 01062 Dresden, Germany

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Dr. Yulia Krupskaya

Dr. Yulia Krupskaya

Leibnitz Institute for Solid State and Materials Research, IFW, Helmholtzstraße 20, 01069 Dresden, Germany

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Xiaocang Han

Xiaocang Han

State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240 China

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Dr. Jichao Zhang

Dr. Jichao Zhang

Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204 China

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Dr. Jian Zhang

Dr. Jian Zhang

Faculty of Chemistry and Food Chemistry & Center for Advancing Electronics Dresden, Technische Universität Dresden, 01062 Dresden, Germany

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Dr. Vladislav Kataev

Dr. Vladislav Kataev

Leibnitz Institute for Solid State and Materials Research, IFW, Helmholtzstraße 20, 01069 Dresden, Germany

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Prof. Bernd Büchner

Prof. Bernd Büchner

Leibnitz Institute for Solid State and Materials Research, IFW, Helmholtzstraße 20, 01069 Dresden, Germany

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Prof. Inez M. Weidinger

Prof. Inez M. Weidinger

Faculty of Chemistry and Food Chemistry & Center for Advancing Electronics Dresden, Technische Universität Dresden, 01062 Dresden, Germany

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Prof. Stefan Kaskel

Prof. Stefan Kaskel

Faculty of Chemistry and Food Chemistry & Center for Advancing Electronics Dresden, Technische Universität Dresden, 01062 Dresden, Germany

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Prof. Pan Liu

Prof. Pan Liu

State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240 China

Shanghai Key Laboratory of Advanced High-Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240 China

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Prof. Mingwei Chen

Prof. Mingwei Chen

State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240 China

Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, 21214 USA

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Dr. Renhao Dong

Corresponding Author

Dr. Renhao Dong

Faculty of Chemistry and Food Chemistry & Center for Advancing Electronics Dresden, Technische Universität Dresden, 01062 Dresden, Germany

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Prof. Xinliang Feng

Corresponding Author

Prof. Xinliang Feng

Faculty of Chemistry and Food Chemistry & Center for Advancing Electronics Dresden, Technische Universität Dresden, 01062 Dresden, Germany

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First published: 06 June 2019
Citations: 361

Graphical Abstract

Thanks to the links: A copper phthalocyanine-based 2D conjugated MOF with square-planar cobalt bis(dihydroxy) units (Co-O4) as linkages serves as an electrocatalyst for the oxygen reduction reaction with high catalytic activity (E1/2=0.83 V vs. RHE). The linking Co centers with optimized electronic structure (eg=1) are identified as the active sites.

Abstract

Layered two-dimensional (2D) conjugated metal–organic frameworks (MOFs) represent a family of rising electrocatalysts for the oxygen reduction reaction (ORR), due to the controllable architectures, excellent electrical conductivity, and highly exposed well-defined molecular active sites. Herein, we report a copper phthalocyanine based 2D conjugated MOF with square-planar cobalt bis(dihydroxy) complexes (Co-O4) as linkages (PcCu-O8-Co) and layer-stacked structures prepared via solvothermal synthesis. PcCu-O8-Co 2D MOF mixed with carbon nanotubes exhibits excellent electrocatalytic ORR activity (E1/2=0.83 V vs. RHE, n=3.93, and jL=5.3 mA cm−2) in alkaline media, which is the record value among the reported intrinsic MOF electrocatalysts. Supported by in situ Raman spectro-electrochemistry and theoretical modeling as well as contrast catalytic tests, we identified the cobalt nodes as ORR active sites. Furthermore, when employed as a cathode electrocatalyst for zinc–air batteries, PcCu-O8-Co delivers a maximum power density of 94 mW cm−2, outperforming the state-of-the-art Pt/C electrocatalysts (78.3 mW cm−2).

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