A termetallic catalyst of Pt-Ir-Au/Al2O3 for NOx decomposition was prepared by loading the metallic colloids in C2H5OH-H2O solution and a surfactant of polyvinyl pyrrolidone.Compared with an impregnated Pt/Al2O3 catal...A termetallic catalyst of Pt-Ir-Au/Al2O3 for NOx decomposition was prepared by loading the metallic colloids in C2H5OH-H2O solution and a surfactant of polyvinyl pyrrolidone.Compared with an impregnated Pt/Al2O3 catalyst,the termetallic catalyst of PtIrAu811/Al2O3,with a Pt：Ir：Au atomic ratio of 8：1：1,exhibited higher NO decomposition and selectivity to N2.Transmission electron microscopy and X-ray diffraction were conducted to clarify the state of the supported metals and indicate three precious metals alloyed on the catalyst.In the study of NO-temperature programmed desorption,oxygen desorption on the PtIrAu811 catalyst shifted to the low temperature side compared to that on Pt/Al2O3,which correlated well with its higher catalytic performance in NO decomposition.展开更多
The urgent need for sustainable waste management has led to the exploration of upcycling waste plastics and biomass as viable solutions.In 2018,global plastic production reached 359 million tonnes,with an estimated 12...The urgent need for sustainable waste management has led to the exploration of upcycling waste plastics and biomass as viable solutions.In 2018,global plastic production reached 359 million tonnes,with an estimated 12000 million tonnes projected to be delivered and disposed of in landfills by 2050.Unfortunately,current waste management practices result in only 19.5%of plastics being recycled,while the rest is either landfilled(55%)or incinerated(25.5%).The improper disposal of plastics contributes to issues such as soil and groundwater contamination,air pollution,and wildlife disturbance.On the other hand,biomass has the potential to deliver around 240 exajoules of energy per year by 2060.However,its current utilization remains relatively small,with only approximately 9%of biomass-derived energy being consumed in Europe in 2017.This review explores various upcycling methods for waste plastics and biomass,including mechanical,chemical,biological,and thermal approaches.It also highlights the applications of upcycled plastics and biomass in sectors such as construction,packaging,energy generation,and chemicals.The environmental and economic benefits of upcycling are emphasized,including the reduction of plastic pollution,preservation of natural resources,carbon footprint reduction,and circular economy advancement.展开更多
文摘A termetallic catalyst of Pt-Ir-Au/Al2O3 for NOx decomposition was prepared by loading the metallic colloids in C2H5OH-H2O solution and a surfactant of polyvinyl pyrrolidone.Compared with an impregnated Pt/Al2O3 catalyst,the termetallic catalyst of PtIrAu811/Al2O3,with a Pt：Ir：Au atomic ratio of 8：1：1,exhibited higher NO decomposition and selectivity to N2.Transmission electron microscopy and X-ray diffraction were conducted to clarify the state of the supported metals and indicate three precious metals alloyed on the catalyst.In the study of NO-temperature programmed desorption,oxygen desorption on the PtIrAu811 catalyst shifted to the low temperature side compared to that on Pt/Al2O3,which correlated well with its higher catalytic performance in NO decomposition.
基金financial supports from the Science and Technology Major Project of Tianjin(Grant Nos.19ZXNCGX00030 and 20JCYBJC00870)the National Nature Science Foundation of China(Grant Nos.21938008 and 22078232)。
基金support of the Bryden Centre project(Project ID VA5048)The Bryden Centre project is supported by the European Union’s INTERREG VA Programme,managed by the Special EU Programmes Body(SEUPB)+1 种基金Dr.Mohamed Farghali wishes to acknowledge the support from Grant-in-Aid for JSPS Fellows grant number JP22KF0257Dr.Ahmed I.Osman and Dr.Mahmoud Nasr wish to dedicate this work to the spirit of the distinguished Egyptian Professor Dr.Samih A.Halawy,who passed away on the 2nd of September 2022.
文摘The urgent need for sustainable waste management has led to the exploration of upcycling waste plastics and biomass as viable solutions.In 2018,global plastic production reached 359 million tonnes,with an estimated 12000 million tonnes projected to be delivered and disposed of in landfills by 2050.Unfortunately,current waste management practices result in only 19.5%of plastics being recycled,while the rest is either landfilled(55%)or incinerated(25.5%).The improper disposal of plastics contributes to issues such as soil and groundwater contamination,air pollution,and wildlife disturbance.On the other hand,biomass has the potential to deliver around 240 exajoules of energy per year by 2060.However,its current utilization remains relatively small,with only approximately 9%of biomass-derived energy being consumed in Europe in 2017.This review explores various upcycling methods for waste plastics and biomass,including mechanical,chemical,biological,and thermal approaches.It also highlights the applications of upcycled plastics and biomass in sectors such as construction,packaging,energy generation,and chemicals.The environmental and economic benefits of upcycling are emphasized,including the reduction of plastic pollution,preservation of natural resources,carbon footprint reduction,and circular economy advancement.
