Abstract: <SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: " mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: mso-fareast-font-family: 12.0pt; mso-bidi-font-size: Roman?; New Times AR-SA; 宋体?>Nickel boride (NiB) amorphous alloy was prepared by chemical reduction method in conventional water solution and ionic liquid,i.e.1-butyl-3-methylimidazolium tetrafluoroborate ([bmim]BF</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: " mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: mso-fareast-font-family: 12.0pt; mso-bidi-font-size: Roman?; New Times AR-SA; 宋体?><SUB>4</SUB>) solution,respectively.Morphology and structure of the prepared samples were characterized by XRD,specific surface area tester,TEM,FT-IR,and Uv-vis.Results showed that the NiB prepared with [bmim]BF</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: " mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: mso-fareast-font-family: 12.0pt; mso-bidi-font-size: Roman?; New Times AR-SA; 宋体?><SUB>4</SUB> as medium,had larger amorphous structure,smaller grain size distribution,and greater specific surface area,comparing with that using conventional water solution as medium.</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: " mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: mso-fareast-font-family: 12.0pt; mso-bidi-font-size: Roman?; New Times AR-SA; 宋体?>Cataly</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: " mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: mso-fareast-font-family: 12.0pt; mso-bidi-font-size: Roman?; New Times AR-SA; 宋体?>tic</SPAN><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: " AR-SA? mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: 12.0pt; mso-bidi-font-size: Roman?; New Times ?Times mso-bidi-font-family: mso-hansi-font-family:></SPAN><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: " mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: mso-fareast-font-family: 12.0pt; mso-bidi-font-size: Roman?; New Times AR-SA; 宋体?>performance test indicated,the catalytic activity of NiB prepared in ionic liquid for styrene hydrogenation was remarkably higher than that of prepared in conventional way.Therefore,ionic liquid was not just being the reaction medium and it had a certain amount of chemical combination with the surface of NiB which effectively prevented the agglomeration of NiB.</SPAN>