使用原位穆斯堡尔谱考察了非担载铁-锰氧化物和铁-锰/活性炭(Fe-Mn/AC)催化剂在不同温度下的还原。还原前Fe-Mn/AC催化剂中存在的为超顺磁α-(Fe_1-_xMn_x)_2O_3和没有充分脱水的铁-锰氧化物。铁的还原同时受铁-锰和铁-活性炭相互作用的影响,载体活性炭使F~(3+)相对稳定而难以还原,锰则促进铁还原到Fe~(2+)并形成相对稳定的FeO-MnO固溶体而难以还原到Fe~0。对4%Mn-8%Fe/AC催化剂,即使在500℃氢气中处理,仍有相当数量的Fe~(3+)和Fe~(2+)不能还原。 In-situ Mössbauer spectroscopy was used to investigate the reduction of unsupported iron-manganese oxide and iron-manganese / activated carbon (Fe-Mn / AC) catalysts at different temperatures. Pre-reduction Fe-Mn / AC catalyst exists superparamagnetic α- (Fe_1-_xMn_x) _2O_3 and not fully dehydrated iron - manganese oxide. The reduction of iron is also affected by the interaction of iron-manganese and iron-activated carbon. The supported activated carbon makes F ~ (3 +) relatively stable and hard to be reduced. Manganese promotes the reduction of iron to Fe ~ (2+) and the formation of relatively stable FeO -MnO solid solution and difficult to reduce to Fe ~ 0. For 4% Mn-8% Fe / AC catalyst, a considerable amount of Fe 3+ and Fe 2+ could not be reduced even when treated at 500 ° C in hydrogen.