The National Engineering Research Center for Urban Pollution Control, Tongji University, Shanghai, China.
J Hazard Mater. 2011 Dec 15;197:424-9. doi: 10.1016/j.jhazmat.2011.09.054. Epub 2011 Sep 17.
Nanoscale Fe/Au particles were fabricated on glassy carbon substrates by electrodeposition of Fe and the subsequent galvanic replacement with Au. The particles were characterized by scanning electron microscopy and transmission electron microscopy, and a hollow structure was found. The process and mechanism of electrochemical reduction of nitrobenzene on Fe/Au particles were studied by cyclic voltammetry and constant-potential electrolysis. The results showed that nanoscale Fe/Au particles exhibited higher catalytic activity than bulk gold for nitrobenzene reduction. Nitrobenzene reduction proceeded following different pathways with different electrolyte compositions. The removal rate of nitrobenzene on nanoscale Fe/Au particles was up to 97% with electrolysis within 120 min at -0.35 V in 0.1 M H(2)SO(4) and aniline was found to be the electrolysis product.
纳米尺度的 Fe/Au 颗粒通过在玻璃碳基底上电沉积 Fe 以及随后与 Au 的电置换而制备。通过扫描电子显微镜和透射电子显微镜对颗粒进行了表征，发现其具有空心结构。通过循环伏安法和恒电位电解研究了硝基苯在 Fe/Au 颗粒上的电化学还原过程和机制。结果表明，纳米尺度的 Fe/Au 颗粒对于硝基苯还原比块状金具有更高的催化活性。硝基苯还原的路径随电解质组成的不同而不同。在 0.1 M H(2)SO(4)中于-0.35 V 电解 120 min 内，纳米尺度 Fe/Au 颗粒上的硝基苯去除率高达 97%，并且发现苯胺是电解产物。
