Fabrication of Conjugated Porous Polymer Catalysts for Oxygen Reduction Reactions: A Bottom-Up Approach

Sujoy Bandyopadhyay,Mohaseen S Tamboli,Bo Ram Lee,Hyosung Choi,Danil W Boukhvalov,Cheongbeom Lee,Hong In Jeong,M Alam Khan,Snehal Lokhandwala,Su Ryong Ha

doi:10.3390/catal10111224

Abstract

The present study demonstrates the fabrication of a conjugated porous polymer (CPP-P2) through a Pd-catalyzed Suzuki–Miyaura poly-condensation reaction. 13C cross-polarization solid-state NMR and Fourier transform infrared (FTIR) spectroscopy were used to characterize CPP-P2. Pristine nitrogen-containing CPP was explored as a catalyst for the oxygen reduction reaction in 0.1 M KOH aqueous alkaline media. In the case of CPP-P2,the polymer oxygen reduction reaction occurs via a four-electron transfer mechanism. An understanding of the oxygen reduction at the molecular level and the role of molecular packing in the three-dimensional structure was proposed based on density functional theory (DFT) modeling.

Highlights

Escalating demand for developing clean and renewable energy sources, next-generation energy conversion, and storage systems is being generated to mitigate an energy crisis in the 21st century
The monomer was synthesized via a Schiff base reaction using pyridine-3,4-diamine and
Aschematic illustration of the fabrication of a conjugated porous polymer (CPP-P2) from 2,3-bis(4-bromophenyl)pyrido(3,4-b)pyrazine and benzene-1,3,5-triboronic acid is shown in Scheme 1

Summary

Introduction

Escalating demand for developing clean and renewable energy sources, next-generation energy conversion, and storage systems is being generated to mitigate an energy crisis in the 21st century. Nitrogen-doped carbon materials, as metal-free catalysts, have high electrocatalytic activity for the ORR and good tolerance in methanol, even under acidic conditions [11], carbon-based materials such as heteroatom-doped porous carbon, functionalized carbon nanotubes (CNTs), and nitrogen-doped graphene have frequently been used for the platinum-free electrocatalysis of the ORR [12]. Among these catalysts, conjugated porous organic polymer (CPP) materials play a crucial role in the design of efficient and promising ORR electrocatalysts due to their highly cross-linked porous

Methods

Results

Conclusion