$2H_{2}$+$O_{2}$$\xrightarrow{{ t^o}}$$2H_{2}O$
$H_{2}$+$CuO$$\xrightarrow{{ t^o}}$$H_{2}O$+$Cu$
$3H_{2}$+$Fe_{2}O_{3}$$\xrightarrow{{ t^o}}$$3H_{2}O$+$2Fe$
$H_{2}$+$PbO$$\xrightarrow{{ t^o}}$$H_{2}O$+$Pb$
$H_{2}$+$Na_{2}O$$\xrightarrow{{ t^o}}$$H_{2}O$+$2Na$