Simonkolleite nano-platelets: Synthesis and temperature effect on hydrogen gas sensing properties

► The crystallinity indicates that the plate-like Zn5(OH)8Cl2·H2O possessed a smooth surface. ► The fast responses and high sensitivity due to high polarity and/or porosity in plate-like structure of simonkolleite sample. ► The sensitivity ΔR/R of our sensor is attractive for further investigation for practical H2 sensor applications. ► The simonkolleite Zn5(OH)8Cl2·H2O nano-platelets revealed a significant and singular H2 gas sensing characteristics.