Table 2 A comparison of the sensing performance of sensors based on the reported literature and our work (T: operating temperature, C: H2 concentration, Res/rec time: response/recovery time, LOD: limit of detection).
Sensing material | T (°C) | C (ppm) | Response | Res/rec time (s) | LOD (ppm) | Response formula | Ref. |
|---|---|---|---|---|---|---|---|
SnO2 | 330 | 200 | 10.3 | 42.4/42.8 | 1 | Ra/Rg | |
Ag/ZnO | 250 | 300 | 4.79 | 175/655 | 5 | (Ra − Rg)/Rg | |
RGO/ZnO | 150 | 200 | 3.5 | 22/90 | 10 | Ra/Rg | |
Pd/SnO2 | 300 | 250 | 26 | 5/50 | 25 | Ra/Rg | |
SnO2/Pd | 300 | 100 | 56 | 22/164 | — | Ra/Rg | |
Biomorphic porous SnO2 | 240 | 200 | 17.2 | 6/10 | — | Ra/Rg | |
ZnO–SnO2 | 330 | 100 | 10 | 69/— | — | Ra/Rg | |
Pd-doped rGO/ZnO-SnO2 | 380 | 100 | 9.4 | 4/8 | 0.05 | Ra/Rg | Present work |
