超细非晶态合金NiB催化剂的制备、表征及其催化加氢性能

采用化学还原法，通过在制备过程中加入KAl(SO4)2和NaOH，制备了超细非晶态合金结构的NiB催化剂。Al(OH)3的生成是制备超细NiB催化剂的关键因素，且NiB的粒径随着Al(OH)3生成量的增加而减小。当Al/Ni摩尔比为1∶1时，该方法制备的NiB催化剂粒径约为未加入铝盐时的1/6。催化评价表明，在糠醛加氢和硝基苯加氢反应中，制备的NiB催化剂的活性随着制备过程Al(OH)3生成量的增加而增大。当Al/Ni摩尔比为1∶1时，NiB催化剂的催化活性为未加入铝盐时的3倍，其原因可以归于该方法制备的NiB催化剂小的粒径和大的比表面积。同时，采用含铝盐废液制备的NiB催化剂的催化结果表明，该方法制备过程的铝盐可以循环使用。

Preparation and Characterization of Ultrafine Amorphous NiB Catalyst and Its Catalytic Performance in Hydrogenation#br#

A series of ultrafine amorphous alloy NiB catalysts were prepared by chemical reduction through introducing KAl(SO4)2 and NaOH during preparation. The formation of Al(OH)3 is a key factor in preparing small particles, and the particle size of NiB is adjusted in certain range by changing the amount of Al(OH)3. When Al/Ni molar ratio is 1∶1, the particle size of prepared NiB is just one sixth of NiB without adding Al(OH)3. The NiB catalysts exhibit increased activity with the larger amount of Al(OH)3 in hydrogenation reactions. When Al/Ni molar ratio is 1∶1, the catalytic performance of corresponding NiB catalyst is three times as that of NiB without adding Al(OH)3 in the hydrogenation of furfural and nitrobenzene. The excellent catalytic performance of NiB catalyst is attributed to the smaller particle and higher surface area. Moreover, waste aluminum salt can be recycled in this preparation.