Redox-active and semi-conducting donor–acceptor conjugated microporous polymers as metal-free ORR catalysts

Abstract

Donor–acceptor CMPs showing inherent conductivity and electrochemical oxygen reduction.

Bimodal Heterogeneous Functionality in Redox‐Active Conjugated Microporous Polymer toward Electrocatalytic Oxygen Reduction and Photocatalytic Hydrogen Evolution

“…In electrocatalysis, electrochemical redox reactions operate at a certain potential on the electrode surface. This process has high significance for energy conversion and storage systems such as fuel cells and in metal–air battery applications . On the other hand, photocatalysis processes deal with the conversion of naturally abundant sunlight energy into chemical energy in the form of molecular hydrogen (H 2 ) .…”

“…Owing to their synthetic diversity and permanent microporosity, CMP materials have gained widespread attention in the realms of energy materials, heterogeneous catalysis, and luminescent materials . Recently, the design of redox‐active CMP materials by integrating electron‐donor and ‐acceptor organic struts has drawn immense interest, as they have shown potential for catalyzing the electrochemical oxygen reduction reaction (ORR), which is a half‐cell reaction in fuel cells and metal–air batteries . Moreover, redox‐active CMPs were also found to be capable of in situ generation and stabilization of metal nanoparticles (NPs), and subsequently, such metal nanoparticle stabilized CMP (NP@CMP) materials have shown significantly improved electrocatalytic activities .…”

“…However, there is no straightforward methodology for controlling nanostructuring in CMP materials. In this context, designing redox‐active CMPs by integration of appropriate electron‐donor and ‐acceptor organic moieties will lead to facile charge migration and probable electrocatalytic activity . At the same time, exploiting highly conjugated π‐chromophoric spacers such as oligo‐( p ‐phenyleneethynylenes) (OPEs) as the building blocks for CMPs could lead to excellent light‐harvesting properties of the materials, which is prerequisite for photocatalysis.…”

“…This process has high significance for energyc onversion and storage systems such as fuel cells and in metal-airb attery applications. [6][7][8] On the other hand, photocatalysis processesd eal with the conversion of naturally abundant sunlight energy into chemicale nergy in the form of molecular hydrogen (H 2 ). [9][10][11][12][13] Photochemical water splitting is considered to be one of the most promising sources of clean and sustainable energy to solve the energyc risis.…”

Preparation of magnetic conjugated microporous polymers for highly efficient removal of dye from water

“…Moreover, CMPs offer advantages over several other POPs such as fine‐tuned microporosity, prominent physico‐chemical properties, good stability and high specific surface area. They have emerged as promising useful materials in electrodes, gas sorption and storage, catalysis, light harvesting, superhydrophobic separation and antibacterial applications . CMPs also have been used as efficient adsorbents for ions, dye and iodine …”