Single-atomic site catalysts have drawn considerable attention because of their maximum atom-utilization efficiency and excellent catalytic activity.In this work,a highly active single-atomic Pt site photocatalyst was...Single-atomic site catalysts have drawn considerable attention because of their maximum atom-utilization efficiency and excellent catalytic activity.In this work,a highly active single-atomic Pt site photocatalyst was synthesized through employing defective Ti0_(2) nanosheets as solid support for photo-catalytic water splitting.It indicated that the surface oxygen vacancies on defective Ti0_(2) nanosheets could effectively stabilize the single-atomic Pt sites through constructing a three-center Ti-Pt-Ti structure.The Ti-Pt-Ti structure can hold the stability of isolated single-atomic Pt sites and facilitate the separation and transfer of photoinduced charge carriers,thereby greatly improving the photocatalytic H2 evolution.Notably,our synthesized photocatalyst exhibited a remarkably enhanced H2 evolution performance,and the H2 production rate is up to 13460.7μmol h^(-1)·g^(-1),which is up to around 29.0 and 4.7 times higher than those of Ti0_(2) nanosheets and Pt nanoparticles-Ti0_(2).In addition,a plausible enhanced reaction mechanism was also proposed combining with photo-electrochemical characterizations and density functional theoiy(DFT)calculation results.Ultimately,it is believed that this work highlights the benefits of a single-site catalyst and paves the way to rationally design the highly active and stable single-atomic site photocatalysts on metal oxide support.展开更多
在当今智能化时代,嵌入式系统开发已广泛渗透日常生活的方方面面,是电子信息类学生的必修课。其中,51单片机和STM32单片机最具代表性,网络资源丰富,常被纳入学校的课程体系。然而,在参与电子设计大赛等学科竞赛时,学生常会遇到多种复杂...在当今智能化时代,嵌入式系统开发已广泛渗透日常生活的方方面面,是电子信息类学生的必修课。其中,51单片机和STM32单片机最具代表性,网络资源丰富,常被纳入学校的课程体系。然而,在参与电子设计大赛等学科竞赛时,学生常会遇到多种复杂题型,必有一道是以TI主控为芯片的硬件设计。基于此,为帮助大学生快速掌握TI系列开发板的应用,本文以自动行驶小车为例,通过理论分析、程序对比和实验验证三部分深入剖析TI芯片与常规芯片在实际应用中的差异。In today’s intelligent era, embedded system development has been widely penetrated into all aspects of daily life, and is a required course for electronic information students. Among them, 51 microcontroller and STM32 microcontroller are the most representative, rich in network resources, and are often included in the school curriculum system. However, when participating in discipline competitions such as electronic design competitions, students often encounter a variety of complex questions, one of which must be the hardware design of TI master chip. Based on this, in order to help college students quickly grasp the application of TI series development board, this paper takes the automatic driving car as an example and deeply analyzes the differences between TI chips and conventional chips in practical application through theoretical analysis, program comparison and experimental verification.展开更多
基金This research was funded by the Canadian Centre for Clean Coal/Carbon and Mineral Processing Technologies(C5MPT),the National Key R&D Program of China(2017YFB0310803)and the China Scholarship Council(CSC).We thank the NanoFAB at the University of Alberta for the convenience of instruments use,and the kindly help of Nanqi Duan and Chao Qi on sample characterization.
文摘Single-atomic site catalysts have drawn considerable attention because of their maximum atom-utilization efficiency and excellent catalytic activity.In this work,a highly active single-atomic Pt site photocatalyst was synthesized through employing defective Ti0_(2) nanosheets as solid support for photo-catalytic water splitting.It indicated that the surface oxygen vacancies on defective Ti0_(2) nanosheets could effectively stabilize the single-atomic Pt sites through constructing a three-center Ti-Pt-Ti structure.The Ti-Pt-Ti structure can hold the stability of isolated single-atomic Pt sites and facilitate the separation and transfer of photoinduced charge carriers,thereby greatly improving the photocatalytic H2 evolution.Notably,our synthesized photocatalyst exhibited a remarkably enhanced H2 evolution performance,and the H2 production rate is up to 13460.7μmol h^(-1)·g^(-1),which is up to around 29.0 and 4.7 times higher than those of Ti0_(2) nanosheets and Pt nanoparticles-Ti0_(2).In addition,a plausible enhanced reaction mechanism was also proposed combining with photo-electrochemical characterizations and density functional theoiy(DFT)calculation results.Ultimately,it is believed that this work highlights the benefits of a single-site catalyst and paves the way to rationally design the highly active and stable single-atomic site photocatalysts on metal oxide support.
文摘在当今智能化时代,嵌入式系统开发已广泛渗透日常生活的方方面面,是电子信息类学生的必修课。其中,51单片机和STM32单片机最具代表性,网络资源丰富,常被纳入学校的课程体系。然而,在参与电子设计大赛等学科竞赛时,学生常会遇到多种复杂题型,必有一道是以TI主控为芯片的硬件设计。基于此,为帮助大学生快速掌握TI系列开发板的应用,本文以自动行驶小车为例,通过理论分析、程序对比和实验验证三部分深入剖析TI芯片与常规芯片在实际应用中的差异。In today’s intelligent era, embedded system development has been widely penetrated into all aspects of daily life, and is a required course for electronic information students. Among them, 51 microcontroller and STM32 microcontroller are the most representative, rich in network resources, and are often included in the school curriculum system. However, when participating in discipline competitions such as electronic design competitions, students often encounter a variety of complex questions, one of which must be the hardware design of TI master chip. Based on this, in order to help college students quickly grasp the application of TI series development board, this paper takes the automatic driving car as an example and deeply analyzes the differences between TI chips and conventional chips in practical application through theoretical analysis, program comparison and experimental verification.
