Carbon nanotubes were coated with a layer of nickel-cobalt-phosphorus （Ni-Co-P） alloy with different compositions of Ni/Co through electroless plating. The effects of the concentration ratio of Co^2＋ to Ni^2＋, bat...Carbon nanotubes were coated with a layer of nickel-cobalt-phosphorus （Ni-Co-P） alloy with different compositions of Ni/Co through electroless plating. The effects of the concentration ratio of Co^2＋ to Ni^2＋, bath temperature, and pH on deposition rate are discussed. The prepared carbon nanotubes covered with Ni-Co-P were characterized and analyzed by fieldemission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, energy dispersive spectroscopy, and a vibrating sample magnetometer. The results show that the deposition rate reached the maximum when the concentration ratio of Co^2＋ to Ni^2＋ is 1 and the pH is 9; the deposition rate increases with the increase of bath temperature. The measurements of the magnetic properties of the obtained carbon nanotubes covered with Ni-Co-P indicate that the magnetic properties greatly depend on the concentration ratio of Co^2＋ to Ni^2＋, and the magnetic saturation reaches the maximum value when the Co^2＋ to Ni^2＋ ratio is 1. In addition, there are two peaks in the coercivity curve at Co^2＋ to Ni^2＋ ratios of 1/2 and 4/1, while the two peaks in the magnetic conductivity curve are located at Co^2＋ to Ni^2＋ ratios of 1/4 and 4/1.展开更多
采用简单的水热法制备了大比表面积的层状磷化钴镍/氮、硫双掺杂还原氧化石墨烯(NiCoP/NSRGO)复合催化剂。利用扫描电子显微镜、透射电子显微镜和X射线衍射仪对所制备的催化剂微观形貌和结构进行表征;利用线性扫描伏安法、循环伏安法和...采用简单的水热法制备了大比表面积的层状磷化钴镍/氮、硫双掺杂还原氧化石墨烯(NiCoP/NSRGO)复合催化剂。利用扫描电子显微镜、透射电子显微镜和X射线衍射仪对所制备的催化剂微观形貌和结构进行表征;利用线性扫描伏安法、循环伏安法和电化学阻抗谱对催化剂进行电化学测试。结果表明,Ni CoP/NSRGO复合催化剂具有良好的催化性能,在0.5 mol/L H_(2)SO_(4)溶液中,Tafel斜率仅为32 m V/dec;当电流密度为10 m A/cm^(2)时,仅需要110 m V的过电位。展开更多
基金Scientific and Technological Research Planning Project of the 13th Five Year Plan of Jilin Provincial Department of Education(JJKH20200237KJ,JJKH20210233KJ)the Fund of Jilin Institute of Chemical Technology(2020 No.22,2021 No.20,2021 No.48)Jilin Scientific and Technological Development Program,the Central Guide Local Scientific and Technological Development Fund,Jilin Province Natural Science Fund(YDZJ202201ZYTS405).
基金ACKNOWLEDGMENTS This work was supported by Project of Fundamental Research the National Major Nanomaterials and Nanostructures （No.2005CB623603） and the National Natural Science Foundation of China （No.10674138）.
文摘Carbon nanotubes were coated with a layer of nickel-cobalt-phosphorus （Ni-Co-P） alloy with different compositions of Ni/Co through electroless plating. The effects of the concentration ratio of Co^2＋ to Ni^2＋, bath temperature, and pH on deposition rate are discussed. The prepared carbon nanotubes covered with Ni-Co-P were characterized and analyzed by fieldemission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, energy dispersive spectroscopy, and a vibrating sample magnetometer. The results show that the deposition rate reached the maximum when the concentration ratio of Co^2＋ to Ni^2＋ is 1 and the pH is 9; the deposition rate increases with the increase of bath temperature. The measurements of the magnetic properties of the obtained carbon nanotubes covered with Ni-Co-P indicate that the magnetic properties greatly depend on the concentration ratio of Co^2＋ to Ni^2＋, and the magnetic saturation reaches the maximum value when the Co^2＋ to Ni^2＋ ratio is 1. In addition, there are two peaks in the coercivity curve at Co^2＋ to Ni^2＋ ratios of 1/2 and 4/1, while the two peaks in the magnetic conductivity curve are located at Co^2＋ to Ni^2＋ ratios of 1/4 and 4/1.
文摘采用简单的水热法制备了大比表面积的层状磷化钴镍/氮、硫双掺杂还原氧化石墨烯(NiCoP/NSRGO)复合催化剂。利用扫描电子显微镜、透射电子显微镜和X射线衍射仪对所制备的催化剂微观形貌和结构进行表征;利用线性扫描伏安法、循环伏安法和电化学阻抗谱对催化剂进行电化学测试。结果表明,Ni CoP/NSRGO复合催化剂具有良好的催化性能,在0.5 mol/L H_(2)SO_(4)溶液中,Tafel斜率仅为32 m V/dec;当电流密度为10 m A/cm^(2)时,仅需要110 m V的过电位。
