在实地调研和数据分析的基础上,运用对数指数分解方法 LMDI（Logarithmic Mean Divisia Index）对浙江省东门岛2007~2012年渔业能源消耗的影响因素进行了分解,将能源消耗的总效应分解为产业结构效应、能源结构效应、能源强度效应和生产...在实地调研和数据分析的基础上,运用对数指数分解方法 LMDI（Logarithmic Mean Divisia Index）对浙江省东门岛2007~2012年渔业能源消耗的影响因素进行了分解,将能源消耗的总效应分解为产业结构效应、能源结构效应、能源强度效应和生产规模效应.结果表明：2007~2012,产业结构调整和生产规模增大是促进东门岛渔业总能耗增长的主要因素;能源强度2007~2010抑制渔业总能耗的增长,2010~2012促进渔业总能耗的增长;能源结构是抑制2007~2012能耗增长的主要因素.最后从产业结构、能源结构、能源强度和生产规模四个方面为东门岛渔业的发展提供了相关建议.展开更多
Noble-metal-based catalysts are the most used nanomaterials to carry out electrochemical reactions,which are commonly applied in fuel cells.This kind of catalyst is expensive and it is worth mentioning that noble meta...Noble-metal-based catalysts are the most used nanomaterials to carry out electrochemical reactions,which are commonly applied in fuel cells.This kind of catalyst is expensive and it is worth mentioning that noble metals are scarce.So,nanocatalysts based on cheaper metals,such as Ag and Cu,are highly desired.Here,we report the natural arrangement of different Ag_(x)Cu_(y)nanostructures through oleylamine reduction.Firstly,an experimental study was carried out in order to study the crystallographic structure,size,and shape of each synthesized nanostructure.The samples were fully characterized via powder X-ray diffraction,while scanning-transmission electron microscopy with a high-angle annular dark-field(HAADF)was applied to investigate the morphological features.Interestingly,the HAADF images of the AgCu NPs mostly show a Janus-type configuration,instead of a core-shell architecture,which is the most stable atomic arrangement.Given this,we subsequently performed classical molecular dynamics simulations under the NVT canonical ensemble to further deepen our study.The theoretical results pointed out that the nanostructure with a core-shell morphology is the one with the lowest energy.However,it also indicates an energy decrease in the Janus configuration,as long as the NP size increases.Therefore,for nanostructures with a large number of atoms,this could lead to a strong competition between Janus and core-shell arrangement.Finally,considering the AgCu NP size,it is worth noting that the theoretical data supports the experimental results,making these systems interesting not only because of their properties but also due to the relatively easy synthesis procedure.展开更多
文摘在实地调研和数据分析的基础上,运用对数指数分解方法 LMDI（Logarithmic Mean Divisia Index）对浙江省东门岛2007~2012年渔业能源消耗的影响因素进行了分解,将能源消耗的总效应分解为产业结构效应、能源结构效应、能源强度效应和生产规模效应.结果表明：2007~2012,产业结构调整和生产规模增大是促进东门岛渔业总能耗增长的主要因素;能源强度2007~2010抑制渔业总能耗的增长,2010~2012促进渔业总能耗的增长;能源结构是抑制2007~2012能耗增长的主要因素.最后从产业结构、能源结构、能源强度和生产规模四个方面为东门岛渔业的发展提供了相关建议.
基金FONDECYT(grants 3170240 and 1200782)Basal Program for Centers of Excellence,Grant AFB180001 CEDENNA,CONICYT+1 种基金DICYT project 041931BRUSA1799 Vridei 041931SB_GO。
文摘Noble-metal-based catalysts are the most used nanomaterials to carry out electrochemical reactions,which are commonly applied in fuel cells.This kind of catalyst is expensive and it is worth mentioning that noble metals are scarce.So,nanocatalysts based on cheaper metals,such as Ag and Cu,are highly desired.Here,we report the natural arrangement of different Ag_(x)Cu_(y)nanostructures through oleylamine reduction.Firstly,an experimental study was carried out in order to study the crystallographic structure,size,and shape of each synthesized nanostructure.The samples were fully characterized via powder X-ray diffraction,while scanning-transmission electron microscopy with a high-angle annular dark-field(HAADF)was applied to investigate the morphological features.Interestingly,the HAADF images of the AgCu NPs mostly show a Janus-type configuration,instead of a core-shell architecture,which is the most stable atomic arrangement.Given this,we subsequently performed classical molecular dynamics simulations under the NVT canonical ensemble to further deepen our study.The theoretical results pointed out that the nanostructure with a core-shell morphology is the one with the lowest energy.However,it also indicates an energy decrease in the Janus configuration,as long as the NP size increases.Therefore,for nanostructures with a large number of atoms,this could lead to a strong competition between Janus and core-shell arrangement.Finally,considering the AgCu NP size,it is worth noting that the theoretical data supports the experimental results,making these systems interesting not only because of their properties but also due to the relatively easy synthesis procedure.
