【摘 要】
：
A series of Ag-ZrO2/SiO2 catalysts with different metal-support interfaces were synthesized in an effort to elucidate the roles of specific interfaces in contro
【机 构】
：
The Gene and Linda Voiland School of Chemical Engineering and Bioengineering,Washington State Univer
论文部分内容阅读
A series of Ag-ZrO2/SiO2 catalysts with different metal-support interfaces were synthesized in an effort to elucidate the roles of specific interfaces in controlling the ethanol to 1,3-butadiene conversion and selectivity.According to the results of detailed characterizations(e.g.CO/pyridine-DRIFTS,XPS,TEM,NH3-TPD,and 1H MAS NMR),it was found that the Ag-O-Si interfaces significantly enhanced the dehy-drogenation of ethanol while the presence of ZrO2 improved the interaction between Ag and ZrO2/SiO2,creating more Agδ+active sites.The high dispersion of ZrO2 on SiO2 generated abundant Zr-O-Si inter-faces with medium and weak Lewis acidity,promoting the condensation of acetaldehyde to crotonalde-hyde.These Zr-O-Si interfaces in close interaction with Agδ+species played a critical role in the enhanced H transfer during the MPV reduction of crotonaldehyde to crotyl alcohol.The synergies among the inter-faces resulted in retarded ethanol dehydration reactivity,balanced ethanol dehydrogenation and conden-sation reactions,and a subsequent high 1,3-butadiene yield.
其他文献
破坏特征和损伤特性是管片接头失效分析和承载性能研究的重要内容,对于确保其受力安全具有重要意义.文章开展了正负弯矩下管片接头抗弯破坏试验,对接头混凝土裂纹和压溃、螺
The soaring demand for electrical energy storage technologies stimulated by advanced portable devices, prospering electric vehicles, and large-scale grid storag
Benefiting from the environmental friendliness of organic electrodes and the high security of aqueous electrolyte,an all-organic aqueous potassium dual-ion full battery(APDIB) was assembled with 21 M potassium bis(fluoroslufonyl)imide(KFSI) water-in-salt
Currently,Na-ion battery(NIB) has become one of the most potential alternatives for Li-ion batteries due to the safety and low cost.As a promising anode for Na-ion storage,expanded graphite has attracted considerable attention.However,the sodiation-desodi
Lithium-sulfur(Li-S)batteries have attracted considerable attention as next-generation energy storage devices owing to their high theoretical specific capacity and safety.However,the commercialization of Li-S batteries is hindered by critical issues,inclu
The growth of electrical transportation is crucially important to mitigate rising climate change concerns regarding materials supply.Supercapacitors are high-po
Lithium metal-based secondary batteries are very promising for next generation power battery due to their high energy density.However,lithium anodes suffer from
Single-atom metal-nitrogen-graphene (M-N-Gra) catalysts are promising materials for electrocatalytic CO2 reduction reaction (CO2RR).However,theoretical explorat
To date,lithium-ion batteries are becoming increasingly significant in the application of portable devices and electrical vehicles,and revolutionary progress in
Ni-rich cathode materials show great potential of applying in high-energy lithium ion batteries,but their inferior cycling stability hinders this process.Study