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. 2022 Aug 8;13:4529. doi: 10.1038/s41467-022-32129-y

Fig. 3. H2O2 and H2 are produced from reactions of water with crushed rocks.

Fig. 3

The data are blank subtracted. The detection limits for H2 and H2O2 were 0.2 nmol g−1 and 9.2 nmol g−1, respectively. The 121 °C experiment was only measured after 1 h, while the other temperatures show three time points: 1, 24 and 168 h. The error bars are 2× the standard deviation of the relevant blanks at each temperature and time point. Yellow symbols represent 60 °C, orange symbols represent 80 °C, red symbols represent 104 °C and blue symbols represent 121 °C. Squares represent 1 h, diamonds represent 24 h and triangles represent 168 h.