求翻译：图1a、图1b分别为催化剂耐热前后的H2-TPD和N2-TPD对比，结果显示，催化剂耐热前后氢气和氮气的脱附峰位置和峰形均没有发生变化，且峰面积也变化很小，脱附性能基本没有发生变化。是什么意思？

Figures 1a, 1b, respectively, before and after the catalyst heat h2-tpd and n2-tpd contrast, the results show that the catalyst heat before and after hydrogen and nitrogen desorption peak position and peak shape are not changed, and the peak area change is small desorption properties has not changed

Figure 1A, Figure 1B, respectively for front and rear of the heat-resistant catalyst H TPD and 2 - 2 - TPD N contrast, the catalyst, the results show heat-resistant front and back of the hydrogen and nitrogen gas and the peak position and peak-are no change has occurred, and peak area is very small,

正在翻译，请等待...

Figures 1A, 1B catalyst heat before and after comparison of the H2-TPD and N2-TPD, respectively, shows that catalyst thermal desorption of hydrogen and nitrogen before the peak positions and peak shape is not changed, and the peak area is very small, desorption behavior has not changed.

Chart 1a, chart 1b respectively be catalyst heat-resisting around H2-TPD and the N2-TPD contrast, finally demonstrated that, the catalyst heat-resisting around hydrogen and the nitrogen coming off peak position and the peak shape has not changed, also the peak area also changes very slightly, the co