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利用水热法制备碳载水滑石(Ni Fe-LDH/石墨毡)复合电极材料,联合空气阴极燃料电池催化络合铁的氧化。与普通石墨毡相比,水滑石电极具有氧化速率快,电池中Fe~(2+)浓度转化速率加快了44.4%。采用扫描电子显微镜(SEM)、X-射线衍射仪(XRD)、X-射线光电子能谱仪(XPS)、扫描电化学显微镜(SECM)、循环伏安(CV)以及计时电势法对NiFe-LDH/石墨毡复合电极进行表征。结果表明,NiFe-LDH/石墨毡复合电极均匀负载在碳纤维上,颗粒均匀,晶型结构为片状,同时在催化Fe~(2+)浓度转化率方面具有更好效果,因此,NiFe-LDH/石墨毡复合电极广泛应用于燃料电池中。
The hydrotalcite composite electrode material was prepared by hydrothermal method, which was combined with air cathode fuel cell to catalyze the oxidation of iron. Compared with common graphite felt, the hydrotalcite electrode has a fast oxidation rate, and the rate of conversion of Fe 2+ in the battery is increased by 44.4%. The microstructure of NiFe-LDH nanoparticles was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SECM), cyclic voltammetry / Graphite felt composite electrode characterization. The results show that the NiFe-LDH / graphite felt composite electrode is uniformly loaded on the carbon fiber, the particles are uniform, the crystal structure is flaky, and the NiFe-LDH / graphite felt composite electrode has better effect in catalyzing the conversion of Fe 2+ concentration. / Graphite felt composite electrode is widely used in fuel cells.