Harvesting solar energy to convert CO₂ into chemical fuels is a promising technology to curtail the growing atmospheric CO₂ levels and alleviate the global dependence on fossil fuels; however, the assembly of efficient and robust systems for the selective photoconversion of CO₂ without sacrificial reagents and external bias remains a challenge. Here we present a photocatalyst sheet that converts CO₂ and H₂O into formate and O₂ as a potentially scalable technology for CO₂ utilization. This technology integrates lanthanum- and rhodium-doped SrTiO₃ (SrTiO₃:La,Rh) and molybdenum-doped BiVO₄ (BiVO₄:Mo) light absorbers modified by phosphonated Co(ii) bis(terpyridine) and RuO₂ catalysts onto a gold layer. The monolithic device provides a solar-to-formate conversion efficiency of 0.08 ± 0.01% with a selectivity for formate of 97 ± 3%. As the device operates wirelessly and uses water as an electron donor, it offers a versatile strategy toward scalable and sustainable CO₂ reduction using molecular-based hybrid photocatalysts.

收集太阳能以将CO ₂转化为化学燃料是一种有前途的技术，可以减少大气中CO ₂含量的增长并减轻全球对化石燃料的依赖。然而，如何在不使用牺牲试剂和外部偏压的情况下组装高效，鲁棒的系统来进行选择性的CO ₂选择性光转化仍然是一个挑战。在这里，我们介绍一种将CO ₂和H ₂ O转化为甲酸酯和O ₂的光催化剂片材，作为一种潜在的可扩展的CO ₂利用技术。该技术集成了掺镧和铑的SrTiO ₃（SrTiO ₃：La，Rh）和掺钼的BiVO ₄通过将Co（ii）双（叔吡啶）和RuO ₂催化剂磷酸化的（BiVO ₄：Mo）光吸收剂到金层上。该单片器件提供了0.08±0.01％的太阳能转化率，甲酸的选择性为97±3％。由于该设备以无线方式运行并使用水作为电子供体，因此它提供了使用基于分子的混合光催化剂实现可扩展且可持续的CO ₂还原的通用策略。