取15 mg0.32% Pt/r.d-SnO2-ALD样品粉末和溴化钾压片，将样品装填至原位反应池内，在25 ml min-1的纯Ar气氛下升温至200 ℃，恒温1 h后降至室温，抽真空至0.5 Pa后测试红外数据作为基底背景扣除。将5% CO/Ar反应气引入原位红外池，并以10 ℃ min-1的速率升至160 ℃，吸附1 h后待降至室温，抽真空测试红外数据。采集到的图谱经扣除背景及9-point平滑处理。

15mg0.32%Pt /r.d-SnO2-ALD sample powder and potassium bromide tablet were taken, the sample was filled into the in-situ reaction tank, and heated to 200 ℃ in a pure Ar atmosphere of 25 ml min-1. After constant temperature for 1 h, the temperature was lowered to room temperature, and the infrared data was tested as the background subtraction after vacuuming to 0.5 Pa.  5% CO/Ar reaction gas was introduced into the in-situ infrared cell, and was increased to 160 ℃ at the rate of 10 ℃ min-1. After adsorption for 1 h, it was reduced to room temperature, and the infrared data was tested by vacuum extraction.  The collected maps were processed by background deduction and 9-point smoothing.