▎ 摘　　要

NOVELTY - Preparing nano-nickel catalyst involves performing in situ growth of nickel-based organic framework compound nickel (Ni)-metal-organic framework (MOF)-74/ reduced graphene oxide (RGO) precursor on graphene oxide (GO) by hydrothermal method, adding a certain proportion of nickel salt and purified terephthalic acid (PTA) to the mixed solvent, stirring continuously, adding a certain concentration of appropriate amount of GO solution, stirring until the sample is fully mixed to obtain a light brown mixed solution, washing black thick matter obtained by hydrothermal treatment washed with dimethylformamide (DMF) and absolute ethanol until the filtrate is neutral. USE - Method for preparing nano-nickel catalyst used for producing hydrogen from low-temperature liquid-phase formic acid. ADVANTAGE - The prepared nano-nickel catalyst has high catalytic hydrogen production activity. DETAILED DESCRIPTION - Preparing nano-nickel catalyst involves performing in situ growth of nickel-based organic framework compound nickel (Ni)-metal-organic framework (MOF)-74/ reduced graphene oxide (RGO) precursor on graphene oxide (GO) by hydrothermal method, adding a certain proportion of nickel salt and purified terephthalic acid (PTA) to the mixed solvent, stirring continuously, adding a certain concentration of appropriate amount of GO solution, stirring until the sample is fully mixed to obtain a light brown mixed solution, washing black thick matter obtained by hydrothermal treatment washed with dimethylformamide (DMF) and absolute ethanol until the filtrate is neutral, drying to obtain the catalyst precursor Ni-MOF-74/RGO, placing catalyst precursor Ni-MOF-74/RGO in a tube furnace, calcining under a nitrogen atmosphere, decomposing Ni-MOF-74, self-assembling into Ni nanoparticles anchored in situ on carbon nanotubes and reduced graphene oxide, and cooling to room temperature after the pyrolysis is over to obtain a graphene-carbon nanotube-supported nano-nickel catalyst Ni/CNT-RGO. An INDEPENDENT CLAIM is included for a nano-nickel catalyst for producing hydrogen from low-temperature liquid-phase formic acid is prepared by preparation method.