Hydrogen Sensing Properties of Mesoporous SnO2 Loaded with Noble Metal

The m-SnO2 powders loaded with noble metals (nM/m-SnO2, n; the amount of noble metals loaded (wt%), M: Pd or Au) have been prepared and their H2-sensing properties have been investigated in this study. The loading of Pd or Au to m-SnO2 was very effective in improving H2 sensing properties of almost all sensors. However, the response of nPd/m-SnO2 decreased with an increase in the amount of Pd loading at a higher temperature, probably because of a high catalytic oxidation activity of H2. Keyword: mesoporous, noble metal, hydrogen sensing, oxidation activity