通过扩大H型反应器,利用面积超过100 cm 2的铟金属片和锡金属片电极电催化还原二氧化碳制甲酸。从二氧化碳还原反应产物的选择性、电解能力等方面进行了研究,得到了大尺寸金属电极反应器电催化制甲酸的优化方法。结果表明,进气流量40 mL...通过扩大H型反应器,利用面积超过100 cm 2的铟金属片和锡金属片电极电催化还原二氧化碳制甲酸。从二氧化碳还原反应产物的选择性、电解能力等方面进行了研究,得到了大尺寸金属电极反应器电催化制甲酸的优化方法。结果表明,进气流量40 mL/min和电流密度-3.0~-4.5 mA/cm^(2)区间及中性电解质为反应的最佳条件。展开更多
The integration of electrochemical CO_(2)reduction(CO_(2)RR) and photoelectrochemical water oxidation offers a sustainable access to valuable chemicals and fuels. Here, we develop a rapidly annealed hematite photoanod...The integration of electrochemical CO_(2)reduction(CO_(2)RR) and photoelectrochemical water oxidation offers a sustainable access to valuable chemicals and fuels. Here, we develop a rapidly annealed hematite photoanode with a photocurrent density of 2.83 mA cm^(-2)at 1.7 VRHEto drive the full-reaction. We also present Cu-alloys electrocatalysis extended from CuInSnS4, which are superior in both activity and selectivity for CO_(2)RR. Specifically, the screened CuInSn achieves a CO_(2)to HCOOH Faradaic efficiency of 93% at a cell voltage of-2.0 V by assembling into artificial photosynthesis cell. The stability test of IT exhibits less than 3% degradation over 24 h. Furthermore, in-situ Raman spectroscopy reveals that both CO_(3)^(-2)and CO_(2)are involved in CO_(2)RR as reactants. The preferential affinity of C for H in the ^(*)HCO_(2)intermediate enables an improved HCOOH-selectivity, highlighting the role of multifunctional Cu in reducing the cell voltage and enhancing the photocurrent density.展开更多
文摘通过扩大H型反应器,利用面积超过100 cm 2的铟金属片和锡金属片电极电催化还原二氧化碳制甲酸。从二氧化碳还原反应产物的选择性、电解能力等方面进行了研究,得到了大尺寸金属电极反应器电催化制甲酸的优化方法。结果表明,进气流量40 mL/min和电流密度-3.0~-4.5 mA/cm^(2)区间及中性电解质为反应的最佳条件。
基金financially supported by the National Key R&D Program of China (2018YFE0208500)the National Natural Science Foundation of China (Grants No. 22072022)funded by King Abdullah University of Science and Technology (KAUST) through the baseline funding (BAS/1/1413-01-01)。
文摘The integration of electrochemical CO_(2)reduction(CO_(2)RR) and photoelectrochemical water oxidation offers a sustainable access to valuable chemicals and fuels. Here, we develop a rapidly annealed hematite photoanode with a photocurrent density of 2.83 mA cm^(-2)at 1.7 VRHEto drive the full-reaction. We also present Cu-alloys electrocatalysis extended from CuInSnS4, which are superior in both activity and selectivity for CO_(2)RR. Specifically, the screened CuInSn achieves a CO_(2)to HCOOH Faradaic efficiency of 93% at a cell voltage of-2.0 V by assembling into artificial photosynthesis cell. The stability test of IT exhibits less than 3% degradation over 24 h. Furthermore, in-situ Raman spectroscopy reveals that both CO_(3)^(-2)and CO_(2)are involved in CO_(2)RR as reactants. The preferential affinity of C for H in the ^(*)HCO_(2)intermediate enables an improved HCOOH-selectivity, highlighting the role of multifunctional Cu in reducing the cell voltage and enhancing the photocurrent density.
