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. 2021 Feb 17;11(2):504. doi: 10.3390/nano11020504

Figure 4.

Figure 4

Room-temperature responses (a) to 5%, 1%, 0.5%, and 0.125% H2 in N2, and (b) to 1%, 0.5%, and 0.125% H2 in synthetic air (20% O2-N2), separately, for Pt-ZnO composite nanoceramic sintered at 700 °C.