The invention discloses a closed
boron group composite nano
noble metal catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) fully dispersing a layered substrate in water, adding a closed
boron cluster M2BxHx, heating and stirring to react completely to obtain a crude product, and washing, carrying out suction
filtration and
drying to obtain a layered substrate-
boron cluster M2BxHx; and (2) dispersing the layered substrate-boron cluster M2BxHx in water, adding
noble metal acid or salt, reacting under
ultraviolet light, and filtering, washing and
drying a product to obtain the layered substrate-boron cluster M2BxHx composite nano
noble metal catalyst. The preparation method provided by the invention is simple, easy to operate and mild in reaction condition. The prepared catalyst can be used for catalyzing
methane to generate
methanol and
ethanol. The repeated
utilization rate of the catalyst reaches up to 10 times or above, and the catalyst has the advantages of
high activity, reproducible carrier, high yield and good selectivity, can be used for industrially catalyzing
methane to produce
methanol and
ethanol, and has great application value.