Revealing the structure evolution of interfacial active species during a dynamic catalytic process is a challenging but pivotal issue for the rational design of high-performance catalysts.Here,we successfully prepare ...Revealing the structure evolution of interfacial active species during a dynamic catalytic process is a challenging but pivotal issue for the rational design of high-performance catalysts.Here,we successfully prepare sub-nanometric Pt clusters(~0.8 nm)encapsulated within the defects of CeO_(2)nanorods via an in-situ defect engineering methodology.The as-prepared Pt@d-CeO_(2)catalyst significantly boosts the activity and stability in the water-gas shift(WGS)reaction compared to other analogs.Based on controlled experiments and complementary(in-situ)spectroscopic studies,a reversible encapsulation induced by active site transformation between the Pt^(2+)-terminal hydroxyl and Pt^(δ+)-O vacancy species at the interface is revealed,which enables to evoke the enhanced performance.Our findings not only offer practical guidance for the design of high-efficiency catalysts but also bring a new understanding of the exceptional performance of WGS in a holistic view,which shows a great application potential in materials and catalysis.展开更多
目的:系统评价预立医疗照护计划(ACP)对心力衰竭(HF)患者临终治疗偏好的影响,为相关研究提供参考依据。方法:使用计算机检索Pubmed、Web of Science、Cochrane Library、Embase、中国知网、维普网、万方数据库从建库至2024年10月23日发...目的:系统评价预立医疗照护计划(ACP)对心力衰竭(HF)患者临终治疗偏好的影响,为相关研究提供参考依据。方法:使用计算机检索Pubmed、Web of Science、Cochrane Library、Embase、中国知网、维普网、万方数据库从建库至2024年10月23日发表的比较ACP干预与常规护理对HF患者临终治疗偏好影响的随机对照试验(RCT),研究对象为HF患者,采用RevMan 5.3软件进行Meta分析。结果:共纳入7篇文献,包括1145例HF患者。meta分析结果显示,ACP可以影响HF患者临终治疗偏好,干预后,患者的临终治疗更偏向于追求舒适护理,减少生命延长治疗[SMD=0.49,95%CI(0.44~0.53),Z=19.77,P<0.00001]。结论:ACP能够对HF患者的临终治疗偏好产生影响,使得患者在临终治疗方面更倾向于追求舒适护理,而非一味地进行毫无意义的生命延长治疗。未来的研究应当进一步探究ACP的最佳实施时机与方法,从而最大化其对HF患者临终护理的积极效应。展开更多
文摘Revealing the structure evolution of interfacial active species during a dynamic catalytic process is a challenging but pivotal issue for the rational design of high-performance catalysts.Here,we successfully prepare sub-nanometric Pt clusters(~0.8 nm)encapsulated within the defects of CeO_(2)nanorods via an in-situ defect engineering methodology.The as-prepared Pt@d-CeO_(2)catalyst significantly boosts the activity and stability in the water-gas shift(WGS)reaction compared to other analogs.Based on controlled experiments and complementary(in-situ)spectroscopic studies,a reversible encapsulation induced by active site transformation between the Pt^(2+)-terminal hydroxyl and Pt^(δ+)-O vacancy species at the interface is revealed,which enables to evoke the enhanced performance.Our findings not only offer practical guidance for the design of high-efficiency catalysts but also bring a new understanding of the exceptional performance of WGS in a holistic view,which shows a great application potential in materials and catalysis.
文摘目的:系统评价预立医疗照护计划(ACP)对心力衰竭(HF)患者临终治疗偏好的影响,为相关研究提供参考依据。方法:使用计算机检索Pubmed、Web of Science、Cochrane Library、Embase、中国知网、维普网、万方数据库从建库至2024年10月23日发表的比较ACP干预与常规护理对HF患者临终治疗偏好影响的随机对照试验(RCT),研究对象为HF患者,采用RevMan 5.3软件进行Meta分析。结果:共纳入7篇文献,包括1145例HF患者。meta分析结果显示,ACP可以影响HF患者临终治疗偏好,干预后,患者的临终治疗更偏向于追求舒适护理,减少生命延长治疗[SMD=0.49,95%CI(0.44~0.53),Z=19.77,P<0.00001]。结论:ACP能够对HF患者的临终治疗偏好产生影响,使得患者在临终治疗方面更倾向于追求舒适护理,而非一味地进行毫无意义的生命延长治疗。未来的研究应当进一步探究ACP的最佳实施时机与方法,从而最大化其对HF患者临终护理的积极效应。
