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报道了超细 Ni- B非晶态合金应用于糠醛液相选择性加氢制备糠醇 .研究发现 ,Ni- B非晶态合金催化剂对糠醇的选择性接近 10 0 % ,而且其催化活性显著高于 Raney Ni和超细 Ni催化剂 .进一步的研究表明 ,对于 Ni-B非晶态合金 ,其在 42 3 K以下进行热处理时 ,未出现明显的晶化 ;但在高温下 ,逐渐发生晶化 ,并导致催化活性和选择性显著下降 .在 XRD、 SEM、 XPS和氢吸附等一系列表征的基础上 ,初步探讨了催化活性与催化剂结构的关系 ,并考察了高温晶化对催化性能的影响
Reported the application of ultrafine Ni-B amorphous alloy to the furfural selective hydrogenation of furfural to prepare furfuryl alcohol.The results show that the selectivity of Ni-B amorphous alloy catalyst to furfuryl alcohol is close to 100% and its catalytic activity is remarkably high In Raney Ni and ultrafine Ni catalysts, further studies show that no obvious crystallization occurs in the Ni-B amorphous alloy when it is heat-treated at 423 K. However, crystallization occurs gradually at high temperature, And lead to a significant decrease in the catalytic activity and selectivity.Based on a series of characterization such as XRD, SEM, XPS and hydrogen adsorption, the relationship between the catalytic activity and the catalyst structure has been preliminarily investigated, and the effect of high temperature crystallization on the catalytic performance has been investigated