Pt-based nanocatalysts offer excellent prospects for various industries.However,the low loading of Pt with excellent performance for efficient and stable nanocatalysts still presents a considerable challenge.In this s...Pt-based nanocatalysts offer excellent prospects for various industries.However,the low loading of Pt with excellent performance for efficient and stable nanocatalysts still presents a considerable challenge.In this study,nanocatalysts with ultralow Pt content,excellent performance,and carbon black as support were prepared through in-situ synthesis.These~2-nm particles uniformly and stably dispersed on carbon black because of the strong s-p-d orbital hybridizations between carbon black and Pt,which suppressed the agglomeration of Pt ions.This unique structure is beneficial for the hydrogen evolution reaction.The catalysts exhibited remarkable catalytic activity for hydrogen evolution reaction,exhibiting a potential of 100 mV at 100 mA·cm^(-2),which is comparable to those of commercial Pt/C catalysts.Mass activity(1.61 A/mg)was four times that of a commercial Pt/C catalyst(0.37 A/mg).The ultralow Pt loading(6.84wt%)paves the way for the development of next-generation electrocatalysts.展开更多
通过网络药理学和分子对接的方法,对芫花中主要抗炎活性成分及其潜在抗炎作用机制进行探讨。首先,基于中药系统药理学技术平台(Traditional Chinese Medicine Systems Pharmacology,TCMSP)建立小分子数据库,然后,借助Swiss Target Predi...通过网络药理学和分子对接的方法,对芫花中主要抗炎活性成分及其潜在抗炎作用机制进行探讨。首先,基于中药系统药理学技术平台(Traditional Chinese Medicine Systems Pharmacology,TCMSP)建立小分子数据库,然后,借助Swiss Target Prediction在线进行反向靶标预测,再通过KEGG通路富集筛选抗炎通路,采用计算机辅助药物设计(CADD)中的分子对接技术将关键小分子与PI3K-Akt通路中的靶标蛋白进行分子对接,并且通过Cytoscape3.7. 2构建化学成分-靶标网络模型。结果表明,通过数据库共检索出芫花中化学成分57个,初步筛选得到关键化学成分14个,共筛选出95个靶标蛋白,PI3K-Akt通路包括14个潜在靶标。分子对接发现芫花素、木犀草素、槲皮素等为芫花发挥抗炎作用的关键化学成分,EGFR、SYK和KDR为抗炎关键靶标蛋白。通过以上研究初步筛选了芫花抗炎的关键靶点及活性成分,为其抗炎作用机制研究提供了理论依据。展开更多
基金financially supported by the National Natural Science Foundation of China(No.5217042069)the Young Elite Scientist Sponsorship Program by China Association for Science and Technology(CAST)(No.YESS20200103)the Fundamental Research Funds for the Central Universities(No.265QZ2022004)。
文摘Pt-based nanocatalysts offer excellent prospects for various industries.However,the low loading of Pt with excellent performance for efficient and stable nanocatalysts still presents a considerable challenge.In this study,nanocatalysts with ultralow Pt content,excellent performance,and carbon black as support were prepared through in-situ synthesis.These~2-nm particles uniformly and stably dispersed on carbon black because of the strong s-p-d orbital hybridizations between carbon black and Pt,which suppressed the agglomeration of Pt ions.This unique structure is beneficial for the hydrogen evolution reaction.The catalysts exhibited remarkable catalytic activity for hydrogen evolution reaction,exhibiting a potential of 100 mV at 100 mA·cm^(-2),which is comparable to those of commercial Pt/C catalysts.Mass activity(1.61 A/mg)was four times that of a commercial Pt/C catalyst(0.37 A/mg).The ultralow Pt loading(6.84wt%)paves the way for the development of next-generation electrocatalysts.
文摘通过网络药理学和分子对接的方法,对芫花中主要抗炎活性成分及其潜在抗炎作用机制进行探讨。首先,基于中药系统药理学技术平台(Traditional Chinese Medicine Systems Pharmacology,TCMSP)建立小分子数据库,然后,借助Swiss Target Prediction在线进行反向靶标预测,再通过KEGG通路富集筛选抗炎通路,采用计算机辅助药物设计(CADD)中的分子对接技术将关键小分子与PI3K-Akt通路中的靶标蛋白进行分子对接,并且通过Cytoscape3.7. 2构建化学成分-靶标网络模型。结果表明,通过数据库共检索出芫花中化学成分57个,初步筛选得到关键化学成分14个,共筛选出95个靶标蛋白,PI3K-Akt通路包括14个潜在靶标。分子对接发现芫花素、木犀草素、槲皮素等为芫花发挥抗炎作用的关键化学成分,EGFR、SYK和KDR为抗炎关键靶标蛋白。通过以上研究初步筛选了芫花抗炎的关键靶点及活性成分,为其抗炎作用机制研究提供了理论依据。
