NiB、NiP与NiPB非晶态合金的物性与催化性能研究

研究了在相同条件下制备的NiB、NiP和NiPB非晶态合金的物性与催化性能，结果表明，NiB非晶态合金具有较高的催化活性，但热稳定性相对较差；NiP非晶态合金热稳定性较高，但催化活性较低；NiPB非晶态合金既具有高活性又具有高稳定性，是一种较理想的非晶态合金催化剂．研究了NiB、NiP和NiPB非晶态合金催化剂的回收再利用，发现催化剂表面的过度氧化是造成催化剂回收率低、活性下降的原因之一。     

晶化后冷却方式诱导形成不同结构的微孔材料(英文)

An interesting result with the products of crystallization being dominated by the cooling rate has been raised in the crystallization of ethylenediamine (EDA)-directed cobalt phosphates and 1,2-diaminopropane (PDA) -directed zinc phosphates. To explore the reason and mechanism behind this phenomenon,these two systems were crystallized under different temperatures from 1 to 6 d followed by fast cooling (in 10 min) or slow cooling (in 3 h) route, respectively. The results showed that, within a certain range ofcrystallization time, slow cooling rate would result in a framework transformation. Further investigation indicates that this transformation is lower-temperature-preferable in EDA-CoPO4 system, and the slow cooling process give the system a period of time to carry out the transformation under lower temperature. However, in PDA-ZnPO4 system, a higher-temperature-preferable transformation has been found, and further study on SAPO-CHA presents a similar result, which is in consistent with general transformation conditions of most crystals, which protrudes the uniqueness of EDA-directed crystallization of cobalt phosphates systems.