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Two-dimensional graphdiyne analogues porphyrin covalent organic framework nanosheets as stable electrocatalyst for oxygen evolution reaction

Abstract

As a rising-star 2D carbon material, graphdiyne (GDY) has received wide attention for its promising applications in many fields due to its unique butadiyne structure. However, owing to lack of active sites, GDY just serves as catalyst supports in electrocatalytic process, especially OER. Developing a new monomer with highly active centers for GDY is an effective strategy to overcome its unfavorable factor. Herein, a metalloporphyrin-based GDY analogue (Co-PDY) with a unique π-conjugated structure is innovatively designed and prepared through Glaser-Hay coupling reaction on copper foam. Cobalt centers of metalloporphyrin moieties can provide numerous electrocatalytic sites for OER; The electrons can be transferred rapidly through the butadiyne linkages in electrocatalytic process; The expanded pores structure (2.34 nm) of Co-PDY also serves as effective transmission channel for small molecule diffusion to maintain the following catalytic process. The three factors altogether endow Co-PDY an excellent OER catalytic performance, including a small overpotential of 270 mV at 10 mA cm-2, low Tafel slope of (99 mV dec-1) and promising long-term stability and durability. Meanwhile, the Co-PDY/CF electrode also displays an acceptable electrocatalytic performance for HER in alkaline. Profiting from the above characteristics, Co-PDY can be regarded as a promising electrocatalyst for new energy devices.

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Publication details

The article was received on 02 Jan 2019, accepted on 04 Feb 2019 and first published on 06 Feb 2019


Article type: Paper
DOI: 10.1039/C9TA00040B
Citation: J. Mater. Chem. A, 2019, Accepted Manuscript

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    Two-dimensional graphdiyne analogues porphyrin covalent organic framework nanosheets as stable electrocatalyst for oxygen evolution reaction

    H. Huang, F. Li, Y. Zhang and Y. Chen, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C9TA00040B

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