Synthesis of Pd/Pt Loaded on the Surface of In2o3 Nanospheres Named Pd/Pt/In2o3 for Rapid and Low Detection Hydrogen Detection

Abstract

Pd and Pt nanoparticles loaded with the effective synthesis of In2O3 nanospheres involved bathing in water and then calcining. To measure hydrogen (H2) quickly, significant limitations still existed for semiconductor gas sensors in situations with lower hydrogen concentrations. Consequently, a Pd/Pt-modified In2O3 sensing material was created for quick hydrogen detection at 400 ppb. The gas sensing results showed that at the proper temperature (200°C), the In2O3 gas sensor loaded with Pd1/Pt1.0/In2O3 had better H2 sensing capability. When Pd1/Pt1.0/In2O3 was exposed to 6000 ppm H2, it clearly responded with a value of 156.57 and recovered quickly (1/20 s) when exposed to 2000 ppm H2. Besides, under mixed gas conditions, the detection limit was as low as 400 ppb (1/7 s) and had high selectivity. Pd1/Pt1.0/In2O3 showed strong stability over an extended period of time. Finally, we discussed the process that raised Pd1/Pt1.0/In2O3's sensitivity.

Keywords: Hydrogen sensor, Pd/Pt/In2O3, Rapid response/recovery, Low detection limit