Electrocatalytic reduction of CO_(2)(CO_(2)RR)to multicarbon products is an efficient approach for ad-dressing the energy crisis and achieving carbon neutrality.In H-cells,achieving high-current C_(2)products is chall...Electrocatalytic reduction of CO_(2)(CO_(2)RR)to multicarbon products is an efficient approach for ad-dressing the energy crisis and achieving carbon neutrality.In H-cells,achieving high-current C_(2)products is challenging because of the inefficient mass transfer of the catalyst and the presence of the hydrogen evolution reaction(HER).In this study,dendritic Cu/Cu_(2)O with abundant Cu^(0)/Cu^(+)interfaces and numerous dendritic curves was synthesized in a CO_(2)atmosphere,resulting in the high selectivity and current density of the C_(2)products.Dendritic Cu/Cu_(2)O achieved a C_(2)Faradaic efficiency of 69.8%and a C_(2)partial current density of 129.5 mA cm^(-2)in an H-cell.Finite element simulations showed that a dendritic structure with a high curvature generates a strong electric field,leading to a localized CO_(2)concentration.Additionally,DRT analysis showed that a dendritic struc-ture with a high curvature actively adsorbed the surrounding high concentration of CO_(2),enhancing the mass transfer rate and achieving a high current density.During the experiment,the impact of the electronic structure on the performance of the catalyst was investigated by varying the atomic ratio of Cu^(0)/Cu^(+) on the catalyst surface,which resulted in improved ethylene selectivity.Under the optimal atomic ratio of Cu^(0)/Cu^(+),the charge transfer resistance was minimized,and the desorption rate of the intermediates was low,favoring C_(2) generation.Density functional theory calculations indicated that the Cu^(0)/Cu^(+) interfaces exhibited a lower Gibbs free energy for the rate-determining step,enhancing C_(2)H_(4) formation.The Cu/Cu_(2)O catalyst also exhibited a low Cu d-band center,which enhanced the adsorption stability of *CO on the surface and facilitated C_(2)formation.This observa-tion explained the higher yield of C_(2) products at the Cu^(0)/Cu^(+) interface than that of H_(2) under rapid mass transfer.The results of the net present value model showed that the H-cell holds promising industrial prospects,contingent upon it being a catalyst with both high selectivity and high current density.This approach of integrating the structure and composition provides new insights for ad-vancing the CO_(2)RR towards high-current C_(2) products.展开更多
目的基于美国癌症肿瘤基因图谱(the cancer genome atlas,TCGA)数据库分析铜调节的细胞死亡相关基因与前列腺癌患者预后和免疫细胞浸润的关系。方法从TCGA数据库下载所有前列腺癌患者的基因数据,其中包括前列腺癌组织501例,正常组织52...目的基于美国癌症肿瘤基因图谱(the cancer genome atlas,TCGA)数据库分析铜调节的细胞死亡相关基因与前列腺癌患者预后和免疫细胞浸润的关系。方法从TCGA数据库下载所有前列腺癌患者的基因数据,其中包括前列腺癌组织501例,正常组织52例。运用R软件提取前列腺癌患者中铜调节的细胞死亡相关基因表达矩阵,进行差异分析、多因素回归分析筛选出预后基因,对预后基因进行生存分析,同时探讨预后相关基因与免疫细胞之间的相关性。结果甘氨酸裂解系统蛋白H(GCSH)与前列腺癌患者的预后显著相关,同时发现其与前列腺癌患者中的树突细胞、CD8^(+)T细胞、浆细胞也显著相关(P<0.05)。结论GCSH基因在前列腺癌的发生、发展中起重要作用,有望成为前列腺癌预后的标志物。展开更多
文摘Electrocatalytic reduction of CO_(2)(CO_(2)RR)to multicarbon products is an efficient approach for ad-dressing the energy crisis and achieving carbon neutrality.In H-cells,achieving high-current C_(2)products is challenging because of the inefficient mass transfer of the catalyst and the presence of the hydrogen evolution reaction(HER).In this study,dendritic Cu/Cu_(2)O with abundant Cu^(0)/Cu^(+)interfaces and numerous dendritic curves was synthesized in a CO_(2)atmosphere,resulting in the high selectivity and current density of the C_(2)products.Dendritic Cu/Cu_(2)O achieved a C_(2)Faradaic efficiency of 69.8%and a C_(2)partial current density of 129.5 mA cm^(-2)in an H-cell.Finite element simulations showed that a dendritic structure with a high curvature generates a strong electric field,leading to a localized CO_(2)concentration.Additionally,DRT analysis showed that a dendritic struc-ture with a high curvature actively adsorbed the surrounding high concentration of CO_(2),enhancing the mass transfer rate and achieving a high current density.During the experiment,the impact of the electronic structure on the performance of the catalyst was investigated by varying the atomic ratio of Cu^(0)/Cu^(+) on the catalyst surface,which resulted in improved ethylene selectivity.Under the optimal atomic ratio of Cu^(0)/Cu^(+),the charge transfer resistance was minimized,and the desorption rate of the intermediates was low,favoring C_(2) generation.Density functional theory calculations indicated that the Cu^(0)/Cu^(+) interfaces exhibited a lower Gibbs free energy for the rate-determining step,enhancing C_(2)H_(4) formation.The Cu/Cu_(2)O catalyst also exhibited a low Cu d-band center,which enhanced the adsorption stability of *CO on the surface and facilitated C_(2)formation.This observa-tion explained the higher yield of C_(2) products at the Cu^(0)/Cu^(+) interface than that of H_(2) under rapid mass transfer.The results of the net present value model showed that the H-cell holds promising industrial prospects,contingent upon it being a catalyst with both high selectivity and high current density.This approach of integrating the structure and composition provides new insights for ad-vancing the CO_(2)RR towards high-current C_(2) products.
文摘目的基于美国癌症肿瘤基因图谱(the cancer genome atlas,TCGA)数据库分析铜调节的细胞死亡相关基因与前列腺癌患者预后和免疫细胞浸润的关系。方法从TCGA数据库下载所有前列腺癌患者的基因数据,其中包括前列腺癌组织501例,正常组织52例。运用R软件提取前列腺癌患者中铜调节的细胞死亡相关基因表达矩阵,进行差异分析、多因素回归分析筛选出预后基因,对预后基因进行生存分析,同时探讨预后相关基因与免疫细胞之间的相关性。结果甘氨酸裂解系统蛋白H(GCSH)与前列腺癌患者的预后显著相关,同时发现其与前列腺癌患者中的树突细胞、CD8^(+)T细胞、浆细胞也显著相关(P<0.05)。结论GCSH基因在前列腺癌的发生、发展中起重要作用,有望成为前列腺癌预后的标志物。
