【摘 要】
：
Extremely small PtRu/C nanocatalysts were prepared via a carbonyl route.A thorough in situ reduction X-ray structural characterization of these catalysts was pe
【机 构】
：
Shanghai Institute of Microsystem and Information Technology,Department of Chemistry,Shanghai Advanc
【基金项目】
：
Supported by the National Natural Science Foundation of China;the Youth’s Innovation Fund of the Shanghai Institute of Microsystem and Information Technology,China
论文部分内容阅读
Extremely small PtRu/C nanocatalysts were prepared via a carbonyl route.A thorough in situ reduction X-ray structural characterization of these catalysts was performed.After synthesis and storage under ambient conditions,the diffraction patterns of PtRu/C catalysts were seriously modified,indicating the surface oxide formation.In the reduced state,the particle size is around 2 nm.The observed relative fluctuations of lattice constants are 3％,which is far too large to be explained by a compositional fluctuation.Their origin is attributed to strong but isotropic strains and is related to the alloy formation.The annealing experiments show all the catalysts present an exceptional thermal stability when annealed in inert ambient,especially that of the Pt1Ru1/C catalyst.Besides,it is interesting to note that there is no thermal expansion evidence from the patterns.
其他文献
This study evaluated the morphological characteristics and dynamic variation in characteristics of soil crust and identified the relationships between soil crus
A 9-month incubation experiment using composted and non-composted amendments derived from vine pruning waste and sewage sludge was carried out to study the effects of the nature and stability of organ
In this study,we have performed first-principles screened exchanged hybrid density function theory with the HSE06 function calculations of the C-Mo,C-W,N-Nb and
The G-quadruplexes formed from G-rich strands in the telomere and oncogene-promoter regions are regarded as new promising targets in the cancer therapy.A G-quad
Background Anxiety appears to be more common in patients with coronary artery disease (CHD) than in the general population,and anxiety symptoms may precede onse
In a low permeability reservoir,the existence of a moving boundary is considered in the study of the transient porous flow with threshold pressure gradient.The
Mesoporous γ-aluminas with large pore size (up to 19 nm,denoted as MA19) are prepared from dispersed pseudo-boehmite using pluronic P123 as template.It is foun
The flow through a single fracture is numerically studied by means of the Fluent Software.The results show that the roughness of the fracture significantly affe
Polyacrylonitrile-metal sulfide nanocomposites with metal sulfide(Ag2S,CuS,PbS) nanoparticles homogeneously dispersed on the polyacrylonitrile(PAN) nanofibre we
Four different types of adsorbents,SBA-15,MCM-41,NaY and SiO2,were used to study the dynamic adsorption/desorption of toluene.To further investigate the influen