Artificial photosynthesis emerges as feasible solution to diminish CO₂ content in the atmosphere. Photoelectrocatalysis can diminish CO₂ concentration while generating useful resources such as methanol. Here an alternative multilayer photoelectrode of FTO/Cu/Bi₂Se₃-Se/Cu₂O is developed to enhance selective reduction of CO₂ towards methanol. A novel electrosynthetic approach is described as strategy to modulate the atomic composition of p-type bismuth selenide chalcogenide intralayer. This method enhanced performance and selectivity of n-type Cu₂O photoelectrocatalysts. Alkaline pH conditions favored yield and selectivity towards methanol production from CO₂. The formation of an n-p heterojunction affects the Cu₂O performance on CO₂ reduction. The novel engineered FTO/Cu/Bi₂Se₃-Se/Cu₂O multilayer photoelectrodes allowed obtaining up to 4.5 mM of methanol, which correspond to 3-fold higher concentration than conventional FTO/Cu₂O electrodes reported in literature. Photoelectrodes of FTO/ Cu/Bi₂Se₃-Se/Cu₂O overperform conventional Cu₂O in terms of kinetics and selectivity towards methanol production.

人工光合作用是减少大气中CO ₂含量的可行解决方案。光电催化可减少CO ₂浓度，同时产生有用的资源，例如甲醇。在此，开发了FTO / Cu / Bi ₂ Se ₃ -Se / Cu ₂ O的另一种多层光电极，以增强CO ₂向甲醇的选择性还原。一种新型的电合成方法被描述为调节p型硒化铋硫属元素化物内层原子组成的策略。该方法增强了n型Cu _2的性能和选择性O光电子催化剂。碱性pH条件有利于从CO ₂生产甲醇的产率和选择性。np异质结的形成会影响Cu ₂ O还原CO _2的性能。新颖设计的FTO / Cu / Bi ₂ Se ₃ -Se / Cu ₂ O多层光电极可获取高达4.5 mM的甲醇，这相当于文献中报道的传统FTO / Cu ₂ O电极的3倍高浓度。FTO / Cu / Bi ₂ Se ₃ -Se / Cu ₂ O的光电电极性能优于传统的Cu ₂在动力学和对甲醇生产的选择性方面为O。