Plasmonic nanocatalysis provides a unique approach of improving catalyst stability and catalytic activity for the photocatalytic CO₂ conversion into valuable fuels. Herein, among many metals, pristine Cu nanoparticles (Cu NPs) driven through the localized surface plasmon resonance (LSPR) exhibit enhanced photocatalytic activity. Interestingly, different numbers of phenothiazine units bonded to the benzene ring and combined with Cu NPs show significantly different photocatalytic activities. Among them, Cu NPs embedded into triphenothiazine benzene (TPB) furnishes an improved photocatalytic activity of reducing CO₂ to CO, yielding a CO evolution rate of 1308.8 µmol g^-1h⁻¹ without cocatalyst. The H₂ and CH₄ evolution rate of TPB-Cu nanosheet are not significantly different from that of pristine Cu NPs. This result was ascribed to the efficient separation of photoinduced hot charges derived from the unique concave structure and suitable conjugate system in the TPB nanosheet. This work reveals that plasmon assisted catalysis presents a new avenue for energy storage and carbon cycle processes.

等离子体纳米催化提供了一种独特的方法来提高催化剂的稳定性和催化活性，以将光催化CO ₂转化为有价值的燃料。在本文中，在许多金属中，通过局部表面等离振子共振（LSPR）驱动的原始Cu纳米颗粒（Cu NPs）表现出增强的光催化活性。有趣的是，结合到苯环上并与铜纳米颗粒结合的吩噻嗪单元的数量不同，它们显示出显着不同的光催化活性。其中，铜纳米颗粒嵌入到triphenothiazine苯（TPB）提交减少CO的一种改进的光催化活性₂到CO，得到1308.8微摩尔g的CO释放速率^{- 1个}H ^ ^{- 1}无助催化剂。HTPB-Cu纳米片的₂和CH ₄释放速率与原始Cu NPs的释放速率没有显着差异。该结果归因于在TPB纳米片中有效分离了源自独特凹形结构和合适的共轭体系的光诱导热电荷。这项工作表明，等离激元辅助催化为能量存储和碳循环过程提供了新途径。