Supported metal catalyst with synergistic sites, a preparation method therefor and an application thereof

A preparation method of a supported metal catalyst with synergistic sites, characterized in that the preparation method comprises the following steps:

• A. Mix a soluble metal M salt solution uniformly with a solution of [X3S4(H2O)y]Clz cluster compound to obtain a [X3MS4(H2O)y+1]z+ solution;
• B. Disperse Al2O3 support uniformly into the solution obtained in step A, stir at the temperature of 25-60° C. and the rotation speed of 200~500 rpm for 2-6 h until it becomes sticky, and dry it in a constant temperature drying oven at 40~80° C. for 8-24 h to obtain [X3MS4(H2O)y+1]z+/Al2O3 solid powder;
• C. Add 1.5 g solid powder obtained in step B into 5-30 mL of deionized water, add excessive soluble reducing agent to reduce M2+/M3+ to metal M, wherein the molar ratio of the reducing agent to the M salt is 3:1~7:1, stir for 18~60 min to obtain black suspension, centrifugally wash it to neutrality, and dry it in a constant temperature drying oven at 60° C. for 8-16 h to obtain X3MS4/Al2O3;
• D. Place the X3MS4/Al2O3 obtained in step C into an atmosphere furnace, and heat it to 300~600° C. at a rate of 5-20° C./min for 0.25-6 h of treatment to obtain X3MSx/Al2O3 catalyst (0<x<4);
• The corresponding treatment atmosphere is one of air, 10 vol. % O2/N2, 5-40 vol. % H2/N2 or 5-40 vol. % CO/N2;
• The corresponding X3MSx/Al2O3 catalyst possesses Miso-Vs synergistic sites;
• Wherein,
• the corresponding [X3S4(H2O)y]Clz in step A is a trinuclear transition metal-sulfur cluster compound with an unsaturated cubane structure, wherein X is one of Mo, W, Re and Ir;
• y=9;
• when X is Re (+3), z=1;
• when X is one of W, Mo and Ir(+4), z=4.