Artificial photocatalytic conversion of CO₂ into value-added and renewable fuels has been recognized as a promising approach for solving environmental problems and energy crisis. Achieving this goal, developing a photocatalyst to simultaneously manifest high efficiency, selectivity, and durability is urgent need. Herein, one of all-inorganic cesium lead halide perovskite (viz. Cs₄PbBr₆) with hole-in-microdisk structure hybridized with reduced graphene oxide (rGO) is reported as an effective photocatalyst for reducing of CO₂. Our results show that Cs₄PbBr₆/rGO exhibited high efficiency, selectivity, and durability of CO₂ reduction capacity to CO, catalyzing at a rate of 11.4 μmol g^-1h^-1 with a maintaining stability of 60 h. Residual oxygen impurities as defects in the rGO sheets are demonstrated for facilitating CO₂ activation and reduction capacity to CO. This finding provides a facile pathway for designing high performance perovskite photocatalyst with high selectivity and durability with the aid of defects engineering.

人工光催化将CO ₂转化为增值燃料和可再生燃料已被认为是解决环境问题和能源危机的有前途的方法。为了实现该目标，迫切需要开发同时表现出高效率，选择性和耐久性的光催化剂。在本文中，据报道具有与还原的氧化石墨烯（rGO ）杂交的微孔结构的全无机卤化铯铅钙钛矿（即Cs ₄ PbBr ₆）是一种有效的还原CO _2的光催化剂。我们的结果表明，Cs ₄ PbBr ₆ / rGO表现出高效率，选择性和CO ₂耐久性还原能力为CO，催化速率为11.4μmolg ^-1 h ^-1，保持60 h的稳定性。已证明在rGO片材中作为缺陷的残余氧杂质有助于CO ₂活化和还原为CO的能力。这一发现为通过缺陷工程设计具有高选择性和耐久性的高性能钙钛矿光催化剂提供了一条简便的途径。