@article{Li2026, 
author = {Waner Li and Tingting Zhang and Chunyuan Feng and Mantao Chen and Zhaodi Sun and Eric Storr Sage Handberg and Bo Wang and Lixiang Zhong and Chunhui Dai},
title = {Highly Efficient Simultaneous Photocatalytic Reduction of CO2 and O2 from Air Using Conjugated Microporous Polymers with Ionic Imidazolium Sites},
year = {2026},
journal = {Energy & Environmental Materials},
volume = {9},
number = {1},
keywords = {air, hydrogen peroxide generation, imidazolium sites, ionic-conjugated microporous polymers, photocatalytic CO2 reduction},
url = {https://www.sciopen.com/article/10.1002/eem2.70114},
doi = {10.1002/eem2.70114},
abstract = {Efficient photocatalytic reduction of CO2 is crucial to decrease the atmospheric concentration of CO2. Pairing this process with H2O2 production is of considerable importance for simultaneously producing value-added chemicals. However, the photocatalysts reported for such a process suffer from a high recombination rate of the surface/bulk charges, as well as inefficient enrichment and activation toward CO2 and O2, resulting in low conversion efficiency even in the presence of organic sacrificial agents and expensive metal co-catalysts. Herein, two 1,3,5-triphenylbenzene-based organic polymers with high ionic density and porosity are prepared through a facile Sonogashira polymerization. The ionic imidazolium sites embedded in the polymeric skeleton provide the two polymers (iCMP-1 and iCMP-2) with adsorptive selectivity for CO2/N2 up to 98–102 at 273 K, facilitating the enrichment of CO2 and O2 molecules around the catalytic centers, thus boosting their catalytic conversion directly from air under solar light (100 mW cm−2). Benefiting from the improved charge separation and broad light absorption, along with high CO2 and O2 uptake, iCMP-2 can deliver excellent CO and H2O2 yields (611.8 and 810.6 μmol h−1 g−1, respectively) under an atmosphere composed of water vapor and air without any co-catalysts.}
}