Abstract：
Monolithic catalysts with excellent O3 catalytic decomposition performance were prepared by in situ loading of Co-doped KMn8O16 on the surface of nickel foam. The triple-layer structure with Co-doped KMn8O16/Ni6MnO8/Ni foam was grown spontaneously on the surface of nickel foam by tuning the molar ratio of KMnO4 to Co(NO3)2·6H2O precursors. Importantly, the formed Ni6MnO8 structure between KMn8O16 and nickel foam during in situ synthesis process effectively protected nickel foam from further etching, which significantly enhanced the reaction stability of catalyst. The optimum amount of Co doping in KMn8O16 was available when the molar ratio of Mn to Co species in the precursor solution was 2:1. And the Mn2Co1 catalyst had abundant oxygen vacancies and excellent hydrophobicity, thus creating outstanding O3 decomposition activity. The O3 conversion under dry conditions and relative humidity of 65%, 90% over a period of 5 hr was 100%, 94% and 80% with the space velocity of 28,000 hr-1, respectively. The in situ constructed Co-doped KMn8O16/Ni foam catalyst showed the advantages of low price and gradual applicability of the preparation process, which provided an opportunity for the design of monolithic catalyst for O3 catalytic decomposition.
摘要：
通过在泡沫镍表面原位负载Co掺杂的KMn8O16，制备了具有优异O3催化分解性能的整体催化剂。通过调节KMnO4与Co（NO3）2·6H2O前驱体的摩尔比，在泡沫镍表面自发生长了具有Co掺杂的KMn8O16/Ni6MnO8/Ni泡沫的三层结构。重要的是,在原位合成过程中形成的KMn8O16和泡沫镍之间的Ni6MnO8结构有效地保护了泡沫镍免受进一步蚀刻，显著提高了催化剂的反应稳定性。当前体溶液中Mn与Co物种的摩尔比为2：1时，KMn8O16中Co掺杂的最佳量是可用的。Mn2Co1催化剂具有丰富的氧空位和优异的疏水性,从而造就了优秀的O3分解活性。在干燥条件和相对湿度为65%的情况下，O3的转化率，在5小时内的90％为100％，94％和80％，空速分别为28,000hr-1。原位构建的共掺杂KMn8O16/Ni泡沫催化剂表现出价格低廉、制备工艺逐步适用等优点,这为O3催化分解整体式催化剂的设计提供了契机。
