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
Heteroatom doping, especially dual-doped carbon materials have attracted much attention for the past few years, and have been regarded as one of the most efficient strategies to enhance the capacitance behavior of por...Heteroatom doping, especially dual-doped carbon materials have attracted much attention for the past few years, and have been regarded as one of the most efficient strategies to enhance the capacitance behavior of porous carbon materials. In this work, a facile two-step synthetic route was developed to fab- ricate nitrogen and sulfur co-doped carbon microsphere （NSCM） by using thiourea as dopant. The NJS doping content is controlled via varying the carbonization temperature. It has been proved that a suitable quantity of N and S groups could not only provide pseudo-capacitance but also promote the electron transfer for carbon materials, which ensures the further utilization of the exposed surfaces for charge storage. The optimized NSCM prepared at a carbonization temperature of 800 ℃ （NSCM-800） achieves a capacitance of 277.1 F g^-1 at a current density of 0.3 A g^-1 in 6.0 mol L^-1 KOH electrolyte, which is 71% higher than that of undoped carbon microsphere. Besides, NSCM-800 shows an excellent cycling stability, 98.2% of the initial capacitance is retained after 5,000 cvcles at a current densitv of 3.0 A g^-1.展开更多
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.
基金supported by the National Natural Science Foundation of China(21306060,21573083)the Program for New Century Excellent Talents in Universities of China(NCET-13-0237)+3 种基金the Doctoral Fund of Ministry of Education of China(20130142120039)the Thousand Talents Plan,and the Initiatory Financial Support from Huazhong University of Science and Technology(HUST)Analytical and Testing Center of Huazhong University of Science and Technologythe support of the China Scholarship Council(CSC)
文摘Heteroatom doping, especially dual-doped carbon materials have attracted much attention for the past few years, and have been regarded as one of the most efficient strategies to enhance the capacitance behavior of porous carbon materials. In this work, a facile two-step synthetic route was developed to fab- ricate nitrogen and sulfur co-doped carbon microsphere （NSCM） by using thiourea as dopant. The NJS doping content is controlled via varying the carbonization temperature. It has been proved that a suitable quantity of N and S groups could not only provide pseudo-capacitance but also promote the electron transfer for carbon materials, which ensures the further utilization of the exposed surfaces for charge storage. The optimized NSCM prepared at a carbonization temperature of 800 ℃ （NSCM-800） achieves a capacitance of 277.1 F g^-1 at a current density of 0.3 A g^-1 in 6.0 mol L^-1 KOH electrolyte, which is 71% higher than that of undoped carbon microsphere. Besides, NSCM-800 shows an excellent cycling stability, 98.2% of the initial capacitance is retained after 5,000 cvcles at a current densitv of 3.0 A g^-1.
