【目的】单原子催化剂(single atom catalysts,SACs)由于超高电催化效率而备受关注,特别是以碳为基础的碳基SACs,由于结构可调、孔道排列有序、原子利用率高、导电性好、孔隙率高、比表面积大和稳定性好等特点,被认为是一类极具发展潜...【目的】单原子催化剂(single atom catalysts,SACs)由于超高电催化效率而备受关注,特别是以碳为基础的碳基SACs,由于结构可调、孔道排列有序、原子利用率高、导电性好、孔隙率高、比表面积大和稳定性好等特点,被认为是一类极具发展潜力的新型电催化材料。【研究现状】综述近年来碳基SACs的合成工艺,包括热解法、湿化学法、电化学还原法、原位合成法和球磨法;这些方法具有不同的优缺点,可根据不同反应条件和需求选择合适的合成方法;总结碳基SACs在氧还原反应、析氧反应、析氢反应、氮还原反应、二氧化碳还原反应中的应用。【展望】碳基SACs的合成工艺和性能有望得到进一步优化和提升;碳基SACs将在能源催化及环保等领域发挥更大的作用。展开更多
Monoclinic metabewettite CaV6O16·3H2O has been fabricated via thermal hydrolysis of calcium vanadate （Ca10V6O25）. High purity calcium vanadate precipitate, featuring colnmn structure with surface area of 8.61 m...Monoclinic metabewettite CaV6O16·3H2O has been fabricated via thermal hydrolysis of calcium vanadate （Ca10V6O25）. High purity calcium vanadate precipitate, featuring colnmn structure with surface area of 8.61 m2/g, can be obtained by reacting sodium 0rthovanadate （Na3VO4） with calcium oxide at 90 ℃ for 2 h. By acidification of calcium vanadate in hot water at pH of 1.0-3.0, the monoclinic metabewettite crystals with uniform particle distribution, layered structure and nonporous structure can be fabricated. With the well crystallized layered structure, CaV6O16·3H2O may be a potential cathode material for secondary batteries as well as super capacitor materials.展开更多
文摘【目的】单原子催化剂(single atom catalysts,SACs)由于超高电催化效率而备受关注,特别是以碳为基础的碳基SACs,由于结构可调、孔道排列有序、原子利用率高、导电性好、孔隙率高、比表面积大和稳定性好等特点,被认为是一类极具发展潜力的新型电催化材料。【研究现状】综述近年来碳基SACs的合成工艺,包括热解法、湿化学法、电化学还原法、原位合成法和球磨法;这些方法具有不同的优缺点,可根据不同反应条件和需求选择合适的合成方法;总结碳基SACs在氧还原反应、析氧反应、析氢反应、氮还原反应、二氧化碳还原反应中的应用。【展望】碳基SACs的合成工艺和性能有望得到进一步优化和提升;碳基SACs将在能源催化及环保等领域发挥更大的作用。
文摘Monoclinic metabewettite CaV6O16·3H2O has been fabricated via thermal hydrolysis of calcium vanadate （Ca10V6O25）. High purity calcium vanadate precipitate, featuring colnmn structure with surface area of 8.61 m2/g, can be obtained by reacting sodium 0rthovanadate （Na3VO4） with calcium oxide at 90 ℃ for 2 h. By acidification of calcium vanadate in hot water at pH of 1.0-3.0, the monoclinic metabewettite crystals with uniform particle distribution, layered structure and nonporous structure can be fabricated. With the well crystallized layered structure, CaV6O16·3H2O may be a potential cathode material for secondary batteries as well as super capacitor materials.
