| 摘要 |
The present invention relates to a platinum/palladium core-cell graphene hybrid based hydrogen sensor and a manufacturing method thereof. A graphene supported by Pt/Pd (platinum/palladium) core-cell is combined by a simple chemical method to be used as a new hydrogen detecting nanomaterial. The Pt/Pd core-cell is combined with a two-stage chemical passage (growth by a medium of a seed) by a polymer assisting growth process. A palladium (Pd) colloidal nanocube with a size of 30 nm which is very regular is used as a core. A thin platinum (Pt) layer is coated on an outer surface of each Pd core as a cell. The Pt/Pd core-cell is simply decorated with a graphene flake by a hydrazine (reducing agent) in an easy first reaction. A result of the Pt/Pd core-cell graphene hybrid is advantageous to have a wide detection range, high intensity, and a rapid reaction/recovery period, thereby being adopted as the new hydrogen detecting material. A resistant type sensor wherein the Pt/Pd core-cell graphene hybrid is used obtains certain reliability at a room temperature, thereby providing the detection range from 40,000 to 1 ppm. The reaction/recovery period of 3/1.2 minutes is measured with the hydrogen sensor at a large reaction value of 36% and at a room temperature. |
