Preparation method and application of Co and Al2O3 compound nanotube array membrane catalyst

The invention discloses a preparation method and application of a Co and Al2O3 compound nanotube array membrane catalyst. The method comprises the following steps of: carrying out constant-pressure anodic oxidation in a urea-containing electrolyte by taking a Co-Al alloy sheet as an anode and high-purity graphite or an other conducting material as a cathode to prepare an alloy sheet with a Co and Al2O3 compound nanotube array membrane grown on a surface; then crushing the obtained alloy sheet into alloy granules, namely catalyst precursors; reducing the catalyst precursors by using H2 to obtain the Co and Al2O3 compound nanotube array membrane catalyst with uniform apertures, smooth tube walls, controllable pipe lengths and consistent pore path directions. The novel catalyst disclosed by the invention is used for preparing 3-aminomethyl-3,5,5-trimethyl cyclohexylamine (IPDA) by carrying out catalytic hydrogenation on 3-cyano-3,5,5-trimethyl cyclohexanone (IPN) and can achieve the maximal transformation rate of IPN by 100% and achieve the maximal selectivity of IPDA more than 98%.