Nickel nanocrystals encapsulated in carbon shells were prepared by the large body knowledge developed for the growth of carbon nanotubes (CNTs), i.e. chemical vapor deposition. The products were characterized by trans...Nickel nanocrystals encapsulated in carbon shells were prepared by the large body knowledge developed for the growth of carbon nanotubes (CNTs), i.e. chemical vapor deposition. The products were characterized by transmission electron microscopy, XRD and FTIR. The results showed that the oxidization of CNT surface made it possible to interreact with nickel ions in solution. Ni-impregnated CNTs transformed into monocrystalline nickel nanoparticles supported on CNTs at 600 ℃ in nitrogen atmosphere. Subsequently, they would be covered with graphene layers during reaction with acetylene at 600 ℃. The formation mechanism has been preliminarily discussed on experimental results.展开更多
采用水热法合成了具有高活性的磷化镍纳米晶(Ni2P),并合成了氮、硫共掺杂石墨烯负载磷化镍纳米催化剂(Ni2P/NSRGO).对该催化剂的结构和形貌进行了表征,并研究其电催化析氢性能.电化学测试结果表明,Ni2P/NSRGO复合电催化剂的析氢性能优于...采用水热法合成了具有高活性的磷化镍纳米晶(Ni2P),并合成了氮、硫共掺杂石墨烯负载磷化镍纳米催化剂(Ni2P/NSRGO).对该催化剂的结构和形貌进行了表征,并研究其电催化析氢性能.电化学测试结果表明,Ni2P/NSRGO复合电催化剂的析氢性能优于Ni2P/RGO催化剂,具有较小的Tafel斜率(35 m V/dec)、较低的过电位(η10=140 m V)和良好的稳定性.展开更多
文摘Nickel nanocrystals encapsulated in carbon shells were prepared by the large body knowledge developed for the growth of carbon nanotubes (CNTs), i.e. chemical vapor deposition. The products were characterized by transmission electron microscopy, XRD and FTIR. The results showed that the oxidization of CNT surface made it possible to interreact with nickel ions in solution. Ni-impregnated CNTs transformed into monocrystalline nickel nanoparticles supported on CNTs at 600 ℃ in nitrogen atmosphere. Subsequently, they would be covered with graphene layers during reaction with acetylene at 600 ℃. The formation mechanism has been preliminarily discussed on experimental results.
文摘采用水热法合成了具有高活性的磷化镍纳米晶(Ni2P),并合成了氮、硫共掺杂石墨烯负载磷化镍纳米催化剂(Ni2P/NSRGO).对该催化剂的结构和形貌进行了表征,并研究其电催化析氢性能.电化学测试结果表明,Ni2P/NSRGO复合电催化剂的析氢性能优于Ni2P/RGO催化剂,具有较小的Tafel斜率(35 m V/dec)、较低的过电位(η10=140 m V)和良好的稳定性.
