Issue 18, 2024

A metal-free perylene–porphyrin based covalent organic framework for electrocatalytic hydrogen evolution

Abstract

A crystalline perylene–porphyrin based covalent organic framework is synthesized via Schiff base [2 + 2] type condensation between 4,4′,4′′,4′′′-(perylene-2,5,8,11-tetrayl) tetrabenzaldehyde (PETA) and 5,10,15,20-tetrakis(4-aminophenyl)porphyrin (PAM) under solvothermal conditions. The porphyrin and perylene units occupy the vertex of a three-dimensional triclinic crystal in an alternate manner. PETA-PAM-COF exhibits permanent microporosity, a reasonably high surface area (about 1400 m2 g−1), and promising chemical stability. A conducting perylene bridged channel is created by AA stacking. PETA-PAM-COF has been utilized for the metal-free hydrogen evolution reaction with a low charge-transfer resistance (Rct) value of 62.22 Ω and a Tafel slope of 122 mV dec−1, demonstrating its potential for practical utilization. PETA-PAM COF showed a current density of 10 mA cm−2 at an overpotential of 261 mV. Remarkable HER activities are demonstrated by the PETA-PAM-COF catalyst as indicated by its faradaic efficiency (96%) and durability (which retained 93% of its original current density after 1000 cycles). We anticipate that the imine-based COF will not only enhance the structural variety but also the electrochemical behavior of these classes of materials.

Graphical abstract: A metal-free perylene–porphyrin based covalent organic framework for electrocatalytic hydrogen evolution

Supplementary files

Article information

Article type
Paper
Submitted
21 جوٗن 2024
Accepted
20 جوٗلایی 2024
First published
22 جوٗلایی 2024

Sustainable Energy Fuels, 2024,8, 4183-4191

A metal-free perylene–porphyrin based covalent organic framework for electrocatalytic hydrogen evolution

S. Samanta, S. Khatun, I. Mukherjee, S. Maity, M. A. Addicoat and A. Pradhan, Sustainable Energy Fuels, 2024, 8, 4183 DOI: 10.1039/D4SE00829D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements