In addition to its remarkable performance, KGF-9 is easier to synthesize and use compared to other photocatalysts. “Our work could shed light on the potential of nonporous CPs as building units for photocatalytic CO 2 conversion systems.” “These values are the highest yet reported for a precious metal-free, single-component photocatalyst-driven reduction of CO 2 to HCOO −,” highlights Maeda. Under visible-light irradiation at 400 nm, KGF-9 demonstrated an apparent quantum yield (product yield per photon absorbed) of 2.6 percent and a selectivity of over 99 percent in the reduction of CO 2 to formate (HCOO −). Despite this, however, it achieved a spectacular photoreduction performance. Known as KGF-9, the novel CP consists of an infinite (–Pb–S–) n structure with properties unlike any other known photocatalyst.įor instance, KGF-9 has no pores or voids, meaning that it has a low surface area. Led by Specially Appointed Assistant Professor Yoshinobu Kamakura and Professor Kazuhiko Maeda from Tokyo Institute of Technology (Tokyo Tech), the team developed a new kind of photocatalyst for CO 2 reduction based on a CP containing lead–sulfur (Pb–S) bonds. In a recent study published in ACS Catalysis, a research team from Japan found a way to overcome these challenges. Unfortunately, most of them either require complex post-synthesis treatment and modifications or are made from precious metals. Over the past few years, scientists have reported many sophisticated photocatalysts based on metal-organic frameworks and coordination polymers (CPs). In particular, photocatalytic CO 2 reduction systems use visible or ultraviolet light to drive CO 2 reduction, much like how plants use sunlight to conduct photosynthesis. One way to address this growing threat is to develop CO 2 reduction technologies, which convert CO 2 into useful chemicals, such as CO and formic acid (HCOOH). The carbon dioxide (CO 2) released into the atmosphere during fossil fuel burning is a leading cause of global warming.
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