Efficient Generation of Hydrogen Peroxide and Formate by an Organic Polymer Dots Photocatalyst in Alkaline Conditions

Overview

Journal Angew Chem Int Ed Engl

Specialty Chemistry

Date 2022 Mar 17

PMID 35299290

Authors

Sicong Wang

Bin Cai

Haining Tian

Affiliations

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Abstract

A photocatalyst comprising binary organic polymer dots (Pdots) was prepared. The Pdots were constructed from poly(9,9-dioctylfluorene-alt-benzothiadiazole), as an electron donor, and 1-[3-(methoxycarbonyl)propyl]-1-phenyl-[6.6]C , as an electron acceptor. The photocatalyst produces H O in alkaline conditions (1 M KOH) with a production rate of up to 188 mmol h g . The external quantum efficiencies were 30 % (5 min) and 14 % (75 min) at 450 nm. Furthermore, photo-oxidation of methanol by Pdots, followed by a disproportionation reaction and an oxidation reaction, produced the high-value chemical formate. On the basis of various spectroscopic and electrochemical measurements, the photophysical processes of the system were studied in detail and a reaction mechanism was proposed.

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