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:探讨“互联网+”医院到家庭(hospital to home,H2H)康复模式在脑卒中后偏瘫患者中的应用效果及对睡眠质量的影响。方法:选取2021年7月—2023年7月广东省工伤康复医院收治的98例脑卒中后偏瘫患者。根据随机数表法将其分为研究组和...目的:探讨“互联网+”医院到家庭(hospital to home,H2H)康复模式在脑卒中后偏瘫患者中的应用效果及对睡眠质量的影响。方法:选取2021年7月—2023年7月广东省工伤康复医院收治的98例脑卒中后偏瘫患者。根据随机数表法将其分为研究组和对照组,各49例。对照组给予常规护理,研究组给予“互联网+”H2H康复模式。比较两组护理满意度,护理前后肢体功能及睡眠质量、生活质量、功能锻炼依从性、自我效能感。结果:研究组护理总满意度高于对照组,差异有统计学意义(P<0.05)。护理后,研究组Fugl-Meyer运动功能评定量表(Fugl-Meyer motor function rating scale,FMA)评分高于对照组,匹兹堡睡眠质量指数量表(Pittsburgh sleep quality index,PSQI)评分低于对照组,差异有统计学意义(P<0.05)。护理后,研究组工作情况、生理功能、心理状态及社会功能评分均高于对照组,差异有统计学意义(P<0.05)。护理后,研究组坚持参与锻炼、锻炼时主动学习、保持患肢功能位评分均高于对照组,差异有统计学意义(P<0.05)。护理后,研究组日常活动、自我管理评分及总分均高于对照组,差异有统计学意义(P<0.05)。结论:“互联网+”H2H康复模式应用于脑卒中后偏瘫患者中能够改善肢体功能及睡眠质量,提升满意度。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:探讨“互联网+”医院到家庭(hospital to home,H2H)康复模式在脑卒中后偏瘫患者中的应用效果及对睡眠质量的影响。方法:选取2021年7月—2023年7月广东省工伤康复医院收治的98例脑卒中后偏瘫患者。根据随机数表法将其分为研究组和对照组,各49例。对照组给予常规护理,研究组给予“互联网+”H2H康复模式。比较两组护理满意度,护理前后肢体功能及睡眠质量、生活质量、功能锻炼依从性、自我效能感。结果:研究组护理总满意度高于对照组,差异有统计学意义(P<0.05)。护理后,研究组Fugl-Meyer运动功能评定量表(Fugl-Meyer motor function rating scale,FMA)评分高于对照组,匹兹堡睡眠质量指数量表(Pittsburgh sleep quality index,PSQI)评分低于对照组,差异有统计学意义(P<0.05)。护理后,研究组工作情况、生理功能、心理状态及社会功能评分均高于对照组,差异有统计学意义(P<0.05)。护理后,研究组坚持参与锻炼、锻炼时主动学习、保持患肢功能位评分均高于对照组,差异有统计学意义(P<0.05)。护理后,研究组日常活动、自我管理评分及总分均高于对照组,差异有统计学意义(P<0.05)。结论:“互联网+”H2H康复模式应用于脑卒中后偏瘫患者中能够改善肢体功能及睡眠质量,提升满意度。
