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以Keggin型铁取代杂多阴离子PW_(11)O_(39)Fe(Ⅲ)(H_2O)~(4-)(PW11Fe)代替传统电芬顿(electro-Fenton)方法中的Fe~(3+)作为电催化剂,构成一个新颖的电催化体系并用于中性水溶液中硝基苯的降解.结果表明,含有1.0 mmol·L~(-1)硝基苯和1.0 mmol·~(-1)PW11Fe的混合磷酸盐溶液(pH 6.86),在-0.5 V电位和60 mL·min~(-1)O_2流速下反应100 min,硝基苯便完全降解.降解的准一级表观速率常数与硝基苯的初始浓度有关,当硝基苯的初始浓度为1.0,2.0和5.0 mmol·L~(-1)时,k_(obs)分别为7.18×10~(-2),3.57×10~(-2)和1.47×10~(-2)min~(-1).降解反应100min的TOC(有机碳总量)去除率约为35%,表明硝基苯的降解过程伴随着矿化.“,”A novel system constituted by Keggin- type iron-substituted heteropolytungstate anion PW_(11)O_(39) Fe(Ⅲ)(H_2O)~(4-) [PW11Fe]was applied to degrade nitrobenzene(NB)in a neutral aqueous solution.Experimental results showed that a complete NB degradation was obtained in less than 100 min in a pH 6.86 mixed phosphate solution containing 1.0 mmol·L~(-1) NB and 1.0 mmol·L~(-1) PW11Fe at the potential of-0.5 V and 60 mL·min~(-1) O_2 flow rate.The observed quasi-first order rate constant k_(obs) of NB degradation related with NB initial concentration.which was determined to be 7.18×10~(-2),3.57×10~(-2),and 1.47×10~(-2) min~(-1) at the initial concentration of 1.0,2.0 and 5.0 mmol·L~(-1),respectively.Ca.35%TOC(total organic carbon) removal obtained at 100 min reaction time indicated that the process of NB degradation was accompanied by partial mineralization.