Efficient CO2-to-CO conversion in dye-sensitized photocatalytic systems enabled by electrostatically-driven catalyst binding†

EES catalysis Pub Date : 2024-09-23 DOI:10.1039/D4EY00156G
Vasilis Nikolaou, Palas Baran Pati, Hélène Terrisse, Marc Robert and Fabrice Odobel
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Abstract

The development of noble metal-free dye-sensitized photocatalytic systems (DSPs) for CO2-to-CO conversion remains limited. Current literature primarily focuses on a single strategy: the simultaneous loading of both the photosensitizer (PS) and the catalyst (CAT) onto titanium dioxide nanoparticles (TiO2 NPs) using anchoring groups. Here, we introduce an innovative method through immobilizing a positively-charged molecular CAT onto negatively-charged PS–TiO2 NPs. Our approach yields promising results, including near-complete CO2-to-CO conversion (∼100% CO) and exceptional stability, achieving 1658 turnover numbers versus the CAT and an apparent quantum yield efficiency (AQY) of 16.9%.

Abstract Image

通过静电驱动催化剂结合实现染料敏化光催化系统中 CO2 到 CO 的高效转化†。
用于将 CO2 转化为 CO 的无贵金属染料敏化光催化系统(DSP)的开发仍然有限。目前的文献主要关注单一策略:利用锚定基团将光敏剂(PS)和催化剂(CAT)同时负载到二氧化钛纳米颗粒(TiO2 NPs)上。在这里,我们介绍了一种创新方法,即把带正电荷的分子 CAT 固定到带负电荷的 PS-TiO2 NPs 上。我们的方法取得了可喜的成果,包括近乎完全的 CO2 到 CO 的转化(CO 转化率达 100%)和卓越的稳定性,CAT 的转化率达 1658,表观量子产率效率(AQY)达 16.9%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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