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[求助]
传质和再吸附对NH3-TPD的影响
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固体酸催化剂测了NH3-TPD，但是审稿人觉得存在传质或者再吸附会延迟脱附时间，要我们证明实验结果没有受到这些影响。师兄师姐们以前测酸强度酸量都是做个TPD，也没被问过这个问题，属实不知道该怎么办，有知道的请指导一下。以下是审稿意见： The use of NH3-TPD should be discussed in more depth by the authors. As Prof. R. Gorte demonstrated in this technique it is essential to ensure that there is no re-adsorption or mass transfer limitations of the probe molecule as this can lead to artificial delay of the elution time. He argued that it is better to limit our discussion of TPD to total acidity rather than strength of acid sites as the latter can be misleading if transfer of molecules varies from one sample to the next. For this reason, I would suggest the authors to show proof that these TPD results are not caused by mass transfer or re-adsorption problems. |
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