摘要
研究了新型ＮｉＰＢ超细非晶合金（ＵＦＡＡＰ）的制备化学反应。ＮｉＰＢＵＦＡＡＰ通过在溶液中使用ＫＢＨ４和ＮａＨ２ＰＯ２还原ＮｉＣｌ２生成，反应较复杂，涉及６个基本化学方程式。通过监控反应ｐＨ随时间的变化，发现总反应分成４个阶段，其中Ⅱ、Ⅲ阶段分别生成ＮｉＰＢ和ＮｉＢＵＦＡＡＰ。在第Ⅱ阶段收集样品可得ＮｉＰＢ。随着反应物比例ｎ（Ｈ２ＰＯ２）／ｎ（Ｎｉ２＋）的增加，产物中的磷含量增加。此外，还考察了反应物溶液滴加方式和滴加速度对反应过程和产物组成的影响。
In this work, we studied the chemical reactions for the preparation of Ni P B, a new kind of ultrafine amorphous alloy particles (UFAAP) They can be produced by the reduction of NiCl 2 by KBH 4 and NaH 2PO 2 simultaneously in aqueous solutions Through monitoring the pH versus time for the reactions, we found that the overall reaction proceeds in 4 stages, in which Ni P B and Ni B UFAAP were formed in stage Ⅱ and Ⅲ, respectively Thus, Ni P B UFAAP can be obtained by collecting the product at the end of stage Ⅱ It is also found that the P content in the product formed increases with the increase of reactant H 2PO - 2/Ni 2+ ratio In addition, the effect of way and speed of mixing reactants on the reaction process and composition of products were also investigated
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
1998年第4期396-400,共5页
Chinese Journal of Inorganic Chemistry
基金
国家教委跨世纪优秀人才基金
国家自然科学基金
关键词
镍磷硼
加氢
非晶合金
超细粒子
催化剂
Ni P B amorphous alloy ultrafine particle reaction mechanism liquid phase reduction
