This work describes the magnifique performance of Ti/TiO₂ nanotubes coated by a complex of copper (II) porphyrin ([Cu(T4H3MPP)]), assigned as (Ti/TiO₂NT-CuP), applied in CO₂ reduction to methanol formation by photoelectrocatalysis technique (PEC). The electrochemical behavior of the Ti/TiO₂NT-CuP indicates that CO₂ is preconcentrated at the electrode surface under the potential of -0.8 V amplify its reduction over the semiconductor in relation to the bare electrode. The system conditions were optimized in order to form methanol and ethanol as products, resulting in 0.35 mmol L⁻¹ of methanol and 0.033 mmol L⁻¹ of ethanol formation after 2 h of PEC under -0.8 V and UV–vis light incidence using 0.1 mol L⁻¹ Na₂SO₄ as supporting electrolyte. That was the first time that methanol formation is identified under porphyrin-based catalysts and PEC system, while ethanol was never reported before using PEC, PC, or even EC techniques. The PEC technique was compared with photocatalysis and electrocatalysis in the same conditions proving that the synergic effect generated by the coupling of light incidence and bias potential on the semiconductor drives to high chemical fuels generation.

这项工作描述了被指定为（Ti / TiO ₂ NT-CuP）的铜（II）卟啉铜（[Cu（T4H3MPP）]的复合物涂覆的Ti / TiO ₂纳米管的放大性能，该复合物用于将CO ₂还原为甲醇通过光电催化技术（PEC）形成。Ti / TiO ₂ NT-CuP的电化学行为表明，CO ₂在-0.8 V的电势下预浓缩在电极表面，从而放大了其相对于裸电极在半导体上的还原度。优化系统条件以形成甲醇和乙醇副产物，得到0.35 mmol L ^-1的甲醇和0.033 mmol L ^-1使用0.1 mol L ^-1 Na ₂ SO ₄作为支持电解质，在-0.8 V和紫外可见光照射下，PEC 2 h后乙醇形成的过程。这是首次在基于卟啉的催化剂和PEC体系下鉴定出甲醇的形成，而在使用PEC，PC甚至EC技术之前从未报道过乙醇。在相同条件下，将PEC技术与光催化和电催化进行了比较，证明了光入射和偏置电势耦合对半导体产生的协同效应驱动了高化学燃料的产生。