The challenge of synergistically optimizing different mechanisms limits the further improvement of plasmon-mediated photocatalytic activities. In this work, the CdS/Au-Ag/B-TiO₂ photocatalyst, combining a heterojunction structure with localized surface plasmon resonance (LSPR), is prepared by a high-temperature hydrogen reduction and hot solvent method. The novel synergistic interaction at the interface between the electric field and the plasmon electromagnetic field drives effective charge separation with improved photocatalytic efficiency. The Cd3Ti2 catalyst exhibits the highest photocatalytic activity, and the H₂ generation efficiency under the full solar spectrum is 15.97 mmol⋅h⁻¹⋅g⁻¹ with good stability as high as 81.3% in 24 h cycles. The CH₄ and CO precipitation performances are achieved at 14.2 μmol⋅h⁻¹⋅g⁻¹ and 113.9 μmol⋅h⁻¹⋅g⁻¹, respectively, in the CO₂RR process. The design of the synergistic mechanism of the dual electric field offers an important development in the field of plasma-mediated photoredox catalysis.

协同优化不同机制的挑战限制了等离子体介导的光催化活性的进一步提高。在这项工作中，CdS/Au-Ag/B-TiO ₂光催化剂结合了异质结结构和局部表面等离子体共振（LSPR），通过高温氢还原和热溶剂法制备。电场和等离子体电磁场之间界面处的新型协同相互作用驱动有效的电荷分离，提高光催化效率。Cd3Ti2催化剂表现出最高的光催化活性，全太阳光谱下的H _{2生成效率为15.97 mmol·h} ^-1 ·g ^-1具有良好的稳定性，在 24 小时循环中高达 81.3%。在 CO ₂ RR 过程中， CH _{4和 CO 沉淀性能分别在 14.2 μmol} ^{·h -1} ·g ^-1和 113.9 μmol ^{·h -1} ·g ^-1下实现。双电场协同机制的设计为等离子体介导的光氧化还原催化领域提供了重要的发展。