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利用程序升温还原(TPR)方法,研究了L型沸石基质中Ni~(2+)、Eu~(3+)离子的还原活性。同时,借助X光电子能谱(XPS)技术,对L型沸石基质中Ni~(2+)、Eu~(3+)离子还原前后的价态进行了分析,结果表明L型沸石基质中Ni~(2+)、Eu~(3+)离子的还原活性较高,可被氢气还原为低价甚至零价。镍离子的存在能促进 Eu~(3+)离子的还原,提高了Eu~(3+)离子的还原百分比。
The reductive activities of Ni ~ (2 +) and Eu ~ (3 +) ions in L zeolite matrix were studied by temperature programmed reduction (TPR). At the same time, the valences of Ni 2+ and Eu 3+ ions in L-type zeolite matrix were analyzed by means of X-ray photoelectron spectroscopy (XPS). The results show that the Ni ~ (2+ ), Eu ~ (3+) ions have high reducibility and can be reduced to low or zero valency by hydrogen. The presence of nickel ions can promote the reduction of Eu 3+ ions and increase the reduction of Eu 3+ ion.