摘要：Electrocatalytic CO_(2) conversion has been considered as a promising way to recycle CO_(2) and produce sustainable fuels and ***,the efficient and highly selective electrochemical reduction of CO_(2) directly into multi‐carbon(C_(2+))products remains a great ***,we synthesized three type catalysts with different morphologies based on Cu_(2)O nanowires,and studied their morphology and crystal facet reconstruction during the pre‐reduction *** from abundant exposure of Cu(100)crystal facet,the nanosheet structure derived Cu catalyst showed a high faradaic efficiency(FE)of 67.5%for C_(2+)***,electrocatalytic CO_(2) reduction studies were carried out on Cu(100),Cu(110),and Cu(111)single crystal electrodes,which verified that Cu(100)crystal facets are favorable for the C_(2+)products in electrocatalytic CO_(2) *** work showed that catalysts would reconstruct during the CO_(2) reduction process and the importance in morphology and crystal facet control to obtain desired products.

摘要：The electrochemical reduction of CO_(2)holds considerable promise in combating global climate change while yielding valuable chemical *** electrode assemblies operating within acidic electrolyte have exhibited noteworthy advancements in CO_(2)utilization efficiency,albeit encountering formidable competition from the hydrogen evolution *** our investigation,we introduced a silicate buffer layer,which yielded exceptional outcomes even using strong acid ***,our approach yielded a CO Faradic efficiency of 90%and reached a substantial current density of 400 mA cm^(-2).Furthermore,our system displayed remarkable stability over a 12-hour duration,and achieved a high single-pass-conversion efficiency of 67%.Leveraging in-situ Raman analysis,we attributed these performance enhancements to the augmented CO_(2)adsorption and localized alkaline environment facilitated by the incorporation of the silicate buffer *** think the addition of buffer layer to adjust the microenvironment is essential to achieve high performance and keep stable in acid condition.

摘要：The Knudsen effusion cell is often used to grow high-quality Cu(In,Ga)Se_(2)(CIGS)thin film in coevaporation ***,the traditional single-heating Knudsen effusion cell cannot deliver complete metal selenides during the whole deposition process,particularly for a low-temperature deposition process,which is probably due to the condensation and droplet ejection at the nozzle of the *** this study,thermodynamics analysis is conducted to decipher the reason for this ***,a new single-heating Knudsen effusion is proposed to solve this difficult problem,which leads to an improvement in the quality of CIGS film and a relative increase in conversion efficiency of 29%at a growth rate of about 230 nm
min1,compared with the traditional efficiency in a lowtemperature rapid-deposition process.