将硼酸和还原氧化石墨烯在高温下热解,制得硼掺杂石墨烯BGE,并用于硫正极和隔膜之间的夹层材料。形貌结构表征证明,硼原子被成功掺杂到石墨烯结构中。电化学测试表明,BGE夹层提高了电极导电性。得益于其对多硫化物的物理拦截和化学吸附...将硼酸和还原氧化石墨烯在高温下热解,制得硼掺杂石墨烯BGE,并用于硫正极和隔膜之间的夹层材料。形貌结构表征证明,硼原子被成功掺杂到石墨烯结构中。电化学测试表明,BGE夹层提高了电极导电性。得益于其对多硫化物的物理拦截和化学吸附功能特点,BGE夹层的采用提高了电池的倍率性能,取得了在10C下500 m Ah·g-1的放电比容量。展开更多
The convertion of solar energy into hydrogen energy with high energy density by photocatalysis is a green and eco-friendly avenue to solve the energy crisis and environmental pollution issues 1,2.Unfortunately,most ph...The convertion of solar energy into hydrogen energy with high energy density by photocatalysis is a green and eco-friendly avenue to solve the energy crisis and environmental pollution issues 1,2.Unfortunately,most photocatalysts usually suffer from the rapid quenching of photogenerated carriers and depressed interfacial H_(2)-generation dynamics 3,4.To overcome the above shortcomings,cocatalysts are widely employed to promote the separation of photocarriers and to create active sites for surface catalytic reactions 5.For a superb cocatalyst,its active sites usually play a key role in the overall performance of photocatalytic H_(2) evolution because the active sites can not only provide a large number of adsorption centers to enrich H+,but also present an outstanding catalytic efficiency to convert H+into H_(2) by reducing its reaction overpotential 6.Thus,the active-site number and efficiency of cocatalysts should be maximized as much as possible to greatly boost the cocatalytic H2-evolution activity by photocatalysis.展开更多
文摘将硼酸和还原氧化石墨烯在高温下热解,制得硼掺杂石墨烯BGE,并用于硫正极和隔膜之间的夹层材料。形貌结构表征证明,硼原子被成功掺杂到石墨烯结构中。电化学测试表明,BGE夹层提高了电极导电性。得益于其对多硫化物的物理拦截和化学吸附功能特点,BGE夹层的采用提高了电池的倍率性能,取得了在10C下500 m Ah·g-1的放电比容量。
基金funded by the Deanship of Scientific Research(DSR)at King Abdulaziz University,Jeddah,under grant No.RG-72-130-42.
文摘The convertion of solar energy into hydrogen energy with high energy density by photocatalysis is a green and eco-friendly avenue to solve the energy crisis and environmental pollution issues 1,2.Unfortunately,most photocatalysts usually suffer from the rapid quenching of photogenerated carriers and depressed interfacial H_(2)-generation dynamics 3,4.To overcome the above shortcomings,cocatalysts are widely employed to promote the separation of photocarriers and to create active sites for surface catalytic reactions 5.For a superb cocatalyst,its active sites usually play a key role in the overall performance of photocatalytic H_(2) evolution because the active sites can not only provide a large number of adsorption centers to enrich H+,but also present an outstanding catalytic efficiency to convert H+into H_(2) by reducing its reaction overpotential 6.Thus,the active-site number and efficiency of cocatalysts should be maximized as much as possible to greatly boost the cocatalytic H2-evolution activity by photocatalysis.
