Room Temperature Detection of Hydrogen Gas Using Graphene Based Conductometric Gas Sensor

Graphene-Based Hydrogen Gas Sensors: A Review

“…In certain design conditions a graphene sensor may be room temperature operable. Thus, a low energy consumption may attribute to such hydrogen sensors [59][60][61][62]. Furthermore, the graphene films owe to their flexibility let to construct hydrogen sensing devices subjected to intensive bending forces [60].…”

“…Thus, a low energy consumption may attribute to such hydrogen sensors [59][60][61][62]. Furthermore, the graphene films owe to their flexibility let to construct hydrogen sensing devices subjected to intensive bending forces [60]. The nanocomposites that contain graphene and noble metals improve hydrogen gas sensing properties.…”

Dynamic Reaction Mechanism of P–N-Switched H2-Sensing Performance on a Pt-Decorated TiO2 Surface

“…The response to H 2 of all of the samples was tested under ambient conditions at room temperature. The response S was defined as in eq , in which R air is the resistance in air and R H 2 is the resistance when H 2 is introduced. The response and recovery times are the time for a resistance change of 90% × | R air – R H 2 | and 90% × | R H 2 – R air |, respectively. , …”

“…The response to H 2 of all of the samples was tested under ambient conditions at room temperature. The response S was defined as in eq 1 44,45…”

“…The response and recovery times are the time for a resistance change of 90% × |R air − R H 2 | and 90% × |R H 2 − R air |, respectively. 44,45 The H 2 -sensing curves of Pt/TiO 2 with 15 s Pt sputtering and pure TiO 2 are shown in Figure 3. The starting resistance of Pt/ TiO 2 with a 15 s Pt sputtering is ∼2 MΩ (Figure 3a), about 3 orders of magnitude larger than that of pure TiO 2 nanoarray films (∼5.2 kΩ, Figure 3b).…”