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  • Publicaion | ACS Catal. (Maeda, et al.) “Selective CO₂-to-Formate Conversion Driven by Visible Light over a Precious-Metal-Free Nonporous Coordination Polymer”
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Publicaion | ACS Catal. (Maeda, et al.) “Selective CO₂-to-Formate Conversion Driven by Visible Light over a Precious-Metal-Free Nonporous Coordination Polymer”

Selective CO-to-Formate Conversion Driven by Visible Light over a Precious-Metal-Free Nonporous Coordination Polymer

Yoshinobu Kamakura, Shuhei Yasuda, Naoki Hosokawa, Shunta Nishioka, Sawa Hongo, Toshiyuki Yokoi, Daisuke Tanaka*, Kazuhiko Maeda*

Metal–organic frameworks (MOFs) and coordination polymers (CPs) are potential candidates for high-performance photocatalysts because of their high tunability of electronic and structural properties. For example, MOFs and CPs having a high specific surface area (∼1000 m2 g–1) have been applied as visible-light-driven photocatalysts for CO reduction and water splitting. Herein, we show a unique CP possessing a metal–sulfur bond with Pb2+, an earth-abundant metal ion. Different from ordinary high-surface-area MOFs and CPs, this CP is nonporous and has just 0.7 m2 g–1 surface area. Nevertheless, owing to its capability of absorbing visible light up to ∼500 nm, it efficiently photocatalyzes CO reduction to formate (HCOO) under visible-light irradiation with >99% selectivity and an apparent quantum yield of 2.6% at 400 nm, even without postmodification treatment such as cocatalyst loading. These values are the highest yet reported for a precious-metal-free single-component photocatalyst for the visible-light-driven reduction of CO to HCOO. This work may thus shed light on the great potential of nonporous CPs as building units of photocatalytic CO conversion systems.

ACS Catal. 2022,12, 10172-10178.
https://pubs.acs.org/doi/10.1021/acscatal.2c02177

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