《Table 1 Physicochemical properties of the as-prepared catalysts》

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《Phosphorous-Modified Carbon Nanotube-Supported Pt Nanoparticles for Propane Dehydrogenation Reaction》

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1) Determined by XRF.2) Calculated from the results obtained on an Elementar Vario Micro Cube elemental analyser.3) Estimated from the results of N2 adsorption-desorption isotherms.4) Calculated based on the results in Figure 4.5) Calculated from the resu

Both Pt/P-CNTs and Pt/CNTs catalysts were applied in the PDH reaction，with the corresponding performance exhibited in Figure 4.It can be observed that there is a slight decrease in the propane rate（i.e.，the reaction rate of propane）over Pt/P-CNTs during the PDH reaction，which reduces from the initial value of 124 mmol/（g·h），viz.approximate-ly 2 times more than that over Pt/CNTs（68 mmol/ （g·h）） ，to 87 mmol/（g·h）.In comparison，however，the propane rate over Pt/CNTs decreases rapidly from 68 mmol/（g·h）to22 mmol/（g·h）.The deactivation parameter（D）is used to measure the catalytic stability，and a low D value suggests a high stability[30].Hence，the catalytic stability over Pt P-CNTs is higher than that over Pt/CNTs（Table 1）.Moreover，the propylene selectivity of Pt/P-CNTs is approximately 90%，which is higher by more than 15 percentage points than that of Pt/CNTs（approximately 75%）.Generally，the P-modified CNT-supported Pt nanoparticles exhibit superior catalytic activity and stability.