论文部分内容阅读
分别以中孔炭(MPC)和VXC-72R炭黑作载体,制备了中孔炭载纳米Au粒子(Au/MPC)和VXC-72R炭黑载纳米Au粒子(Au/CB),并将其用作直接硼氢化钠燃料电池阳极电氧化催化剂.分别用X-射线衍射(XRD)、透射电镜(TEM)等比较了不同载体催化剂的结构和形貌.结果表明,纳米Au粒子均为面心立方结构,Au/MPC中纳米Au粒子的粒径为16nm左右比Au/CB中的纳米Au粒子的更小,且均匀分散在载体的表面.用循环伏安曲线和动电位极化曲线等比较了不同载体催化剂的电化学特性.结果表明,Au/CB的电流密度为38.10mA·cm-2,而Au/MPC的电流密度达到42.88mA·cm-2,比Au/CB的电流密度提高了12.5%.
The mesoporous carbon nano-Au particles (Au / MPC) and the VXC-72R carbon black nano-Au particles (Au / CB) were prepared by using mesoporous carbon (MPC) and VXC- Were used as anode electrocatalysts for direct sodium borohydride fuel cells.The structures and morphologies of the catalysts were compared by X-ray diffraction (XRD), transmission electron microscopy (TEM), etc. The results showed that the nano-Au particles were both face-centered Cubic structure, Au / MPC nano Au particles of about 16nm smaller than the Au / CB nano Au particles smaller and uniformly dispersed in the carrier surface by cyclic voltammetry and the potential curve of the potentiodynamic comparison The results showed that the current density of Au / CB was 38.10mA · cm-2 and the current density of Au / MPC was 42.88mA · cm-2, which was higher than that of Au / CB 12.5%.