Halogen chemistry constitutes an essential part in the industrial production of polymers and gains increasing attention as an attractive strategy to activate light alkanes that constitute natural gas. CeO2-based catal...Halogen chemistry constitutes an essential part in the industrial production of polymers and gains increasing attention as an attractive strategy to activate light alkanes that constitute natural gas. CeO2-based catalysts offer an exciting potential for advances in hydrogen halide recovery that enables a high efficiency of halogen-based processes for activation of small molecules. This review provides an overview of recently developed ceria-based catalysts in the context of polymer industry(polyvinyl chloride, polyurethanes, and polycarbonates) and activation of light hydrocarbons for natural gas upgrading. In addition, mechanistic insight and the challenges of ceria catalysts are provided, aiding the design of future catalytic materials and applications.展开更多
Owing to their effectiveness in regulating charge separation and migration,heterostructures have been widely employed in gaining advanced photocatalysts.However,once the anisotropic crystal and electronic characterist...Owing to their effectiveness in regulating charge separation and migration,heterostructures have been widely employed in gaining advanced photocatalysts.However,once the anisotropic crystal and electronic characteristics of catalysts are considered,those general nondirectional heterostructures fabricated by casually assembling different components seem to be unable to maximize their effectiveness.Herein we highlight that spatial orientation should be taken into account in designing heterostructurebased photocatalysts.By taking bismuth oxyhalide as a model,we fabricated an in-plane heterostructure with(001)-facet exposure,where BiOCl and BiOCl_(x)Br_(1-x) compose the interior and edge components,respectively.With the combination of spatially resolved analyses and theoretical simulations,we demonstrate that such heterostructure orientation facilitates the accumulation of photoinduced charge carriers in the reactive edge region,attributable to the directional migration of interior charge carrier driven by the in-plane energy-level gradient.Benefiting from these features,this in-plane heterostructure shows excellent photocatalytic performance in triggering C-H fluorination under visible light illumination.展开更多
文摘Halogen chemistry constitutes an essential part in the industrial production of polymers and gains increasing attention as an attractive strategy to activate light alkanes that constitute natural gas. CeO2-based catalysts offer an exciting potential for advances in hydrogen halide recovery that enables a high efficiency of halogen-based processes for activation of small molecules. This review provides an overview of recently developed ceria-based catalysts in the context of polymer industry(polyvinyl chloride, polyurethanes, and polycarbonates) and activation of light hydrocarbons for natural gas upgrading. In addition, mechanistic insight and the challenges of ceria catalysts are provided, aiding the design of future catalytic materials and applications.
基金supported by the National Key R&D Program of China(grant nos.2022YFA1502903 and 2021YFA1501502)the Strategic Priority Research Program of Chinese Academy of Sciences(grant no.XDB0450102)+3 种基金the National Natural Science Foundation of China(grant nos.92163105,22275179,and T2122004)the Youth Innovation Promotion Association of CAS(grant no.Y2021123)the Fundamental Research Funds for the Central Universities(grant no.WK2060000039)the Anhui Provincial Natural Science Foundation(grant no.2108085J07).
文摘Owing to their effectiveness in regulating charge separation and migration,heterostructures have been widely employed in gaining advanced photocatalysts.However,once the anisotropic crystal and electronic characteristics of catalysts are considered,those general nondirectional heterostructures fabricated by casually assembling different components seem to be unable to maximize their effectiveness.Herein we highlight that spatial orientation should be taken into account in designing heterostructurebased photocatalysts.By taking bismuth oxyhalide as a model,we fabricated an in-plane heterostructure with(001)-facet exposure,where BiOCl and BiOCl_(x)Br_(1-x) compose the interior and edge components,respectively.With the combination of spatially resolved analyses and theoretical simulations,we demonstrate that such heterostructure orientation facilitates the accumulation of photoinduced charge carriers in the reactive edge region,attributable to the directional migration of interior charge carrier driven by the in-plane energy-level gradient.Benefiting from these features,this in-plane heterostructure shows excellent photocatalytic performance in triggering C-H fluorination under visible light illumination.
