【摘 要】
：
Ag@Ag-Pdx core-shell nanocomposites with various Ag/Pd ratio were deposited on Ag nanoplates using a seed growth method.When physically loaded on C3N4,Ag@Ag-Pd0.077/C3N4 with optimized Ag/Pd ratio could accomplish high catalytic performance for the semi-h
【机 构】
：
Tianjin Key Laboratory of Advanced Functional Porous Materials,Institute for New Energy Materials an
论文部分内容阅读
Ag@Ag-Pdx core-shell nanocomposites with various Ag/Pd ratio were deposited on Ag nanoplates using a seed growth method.When physically loaded on C3N4,Ag@Ag-Pd0.077/C3N4 with optimized Ag/Pd ratio could accomplish high catalytic performance for the semi-hydrogenation of phenylacetylene as well as other aliphatic (both terminal and internal alkynes) alkynes and phenylcycloalkynes containing functional groups (such as ester,hydroxyl,ethyl groups) under room temperature and 1 atm H2.The alloying and ensemble effects are used to interpret such catalytic performance.
其他文献
为有效进行城市空气质量预测、推进城市空气污染防治,弥补传统统计学模型在大数据时代背景下对城市空气质量预测准确率低、容错能力差等问题,提出利用随机森林回归构建城市空气质量预测模型;综合考量污染物浓度、气象参数、时间参数等多方面影响因素,通过网格搜索法调整参数的最优组合,构建基于随机森林回归算法的城市空气质量预测模型;基于重庆市2017-01-01-2020-07-31的指标数据,对重庆市空气质量进行预测分析,结果表明:在模型下训练集与测试集的确定性系数R2均在99％以上,均方误差DMSE和平均绝对误差DMA
Some 4-hydroxy-picolinic acid derived amides were revealed as more efficient ligands for Cu-catalyzed coupling of (hetero)aryl halides with secondary phosphine oxides and phosphites.Only 3-5 mol％ Cul and ligands were required to ensure coupling with a num
Amines are among the most fundamental motifs in chemical synthesis,and the introduction of amine building blocks via selective C—C bond cleavage allows the construction of nitrogen compounds from simple hydrocarbons through direct skeleton modification.He
The diastereoselective photoreactions of Ir(Ⅲ)-amine and Ir(Ⅲ)-diamine complexes are observed in the presence of O2.The∧-[Ir(pq)2(R-mapy)](PF6) (pq is 2-phenylquinoline and mapy is 2-(1-aminoethyl)pyridine) diastereomer is dehydrogenatively oxidized into
The EtOAc fraction of Alpinia katsumadai seeds showed significant inhibition on glycogen phosphorylase a (GPa) with inhibitory ratios of 97.9％ and 64.6％ at concentrations of 200 and 100 μg/mL,respectively.Bioactivity-guided isolation afforded 15 new diary
As a common electrocatalytic system,Au-Pt alloy particles are often prepared as Au-core-Pt-shell (Au@Pt) to make full use of plati-num.However,Au has a strong tendency to segregate to the outer surface,leading to the redistribution of the active sites.Unf
Thermoresponsive polymers with simultaneous biodegradability and signal “self-reporting” outputs that meet for advanced applica-tions are hard to obtain.To address this issue,we developed fluorescence signal “self-reporting” biodegradable thermoresponsive
Dimethyl sulfide-mediated electrochemical synthetic strategy for esterification of amino acids has been reported.A series of amino acids could react smoothly with alcohols,affording the desired esterification products with good efficiency.Importantly,the
We report an exclusively tandem C—O and C—C bond forming beyond the esterification and cyclization reaction of 2-acylbenzoic acids with alcohols to regio-and stereoselective synthesis of the (Z)-3-ylidenephthalides.The reaction uses the nontoxic,inexpensi
3D printing has been developing rapidly in recent years owing to its application in academic and industry areas,but the poor me-chanical property of printing materials limits its application.Herein,a photocurable resin with good mechanical property was ob