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[求助] 锆镍载体的制备问题 急急急

我在实验时需要制备ni9zr1o2-δ作为载体,采用0.4m碳酸钠作为沉淀剂,用共沉淀法制备,但根据文献步骤制得的样品总是失活,请问这是为什么呀?还有其他的制备方法吗?
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