Here, we report ultrathin porous g-C₃N₄ nanosheets modified by AuCu alloy NPs for photothermalcatalytic CO₂ reduction to ethanol. The positive charge on the Au surface improves the adsorption of CO₂ molecules, and the charge transfer from Au to Cu in the alloy enriches Cu with excessive negative charges, promoting the formation of intermediates CO2·- and *CO on the surface of Cu. The strong interaction between the metal and g-C₃N₄ accelerates the migration of photogenerated charges. The increase of temperature leads to the enhancement of the thermal motion of the molecules, resulting in the synergy of photocatalysis and thermal catalysis, which promotes the formation of C-C coupling by *CO polymerization, so that the yield of CH₃CH₂OH was increased. At 120 ℃, the yield and selectivity of ethanol are 0.89 mmol·g^-1·h^-1 and 93.1% for 1.0 wt% Au-Cu/g-C₃N₄, which are 4.2 times that of photocatalysis and 7.6 times that of thermal catalysis.

在这里，我们报告了由AuCu合金NPs改性的超薄多孔gC ₃ N ₄纳米片，用于将光热催化CO ₂还原为乙醇。Au表面的正电荷改善了CO ₂分子的吸附，并且合金中从Au到Cu的电荷转移使Cu富集了过多的负电荷，从而促进了Cu表面上中间体CO2·-和* CO的形成。金属与gC ₃ N ₄之间的强相互作用加速光生电荷的迁移。温度的升高导致分子热运动的增强，导致光催化和热催化的协同作用，促进了* CO聚合形成CC偶联，从而提高了CH ₃ CH ₂ OH的收率。。在120℃下，乙醇的收率和选择性分别为0.89 mmol·g ^-1 ·h ^-1和1.01％（重量）Au-Cu / gC ₃ N _4的93.1％，是光催化的4.2倍和热催化的7.6倍。催化。