碳纳米管负载的CoB和CoBP对磷化氢的分解性能  

Nature of PH3 Decomposition Reaction over CoB and CoBP Alloys Supported on Carbon Nanotubes

作　　者：李俐俐[1,2] 杨丽[1] 周逸潇[1] 韩新宇[1] 张宝贵[1] 

机构地区：[1]南开大学环境科学与工程学院,天津300071 [2]周口师范学院生命科学系,周口466000

出　　处：《天津大学学报》2011年第11期973-978,共6页Journal of Tianjin University(Science and Technology)

基　　金：国家自然科学基金资助项目(20772116)

摘　　要：采用诱导-化学还原法合成了碳纳米管(CNTs)负载的非晶态CoB和一系列不同P与(B+P)摩尔比(n)的非晶态CoBP合金,并将其应用于PH3分解反应中.通过高倍透射电镜(HRTEM)、X-射线衍射、X-射线光电子能谱、比表面积分析和电感耦合等离子发射光谱(ICP)等测试手段对催化剂进行了表征.探讨了催化剂活性与其物理化学性质和电子性质的关系.结果表明:催化反应后,CoBP/CNTs样品中只有CoP相存在,CoP相对该反应具有更高的活性;而CoB/CNTs除了CoP相外,还产生了金属Co相;CoBP/CNTs的活性大于CoB/CNTs,当n为0.43时,CoBP/CNTs活性最高.Amorphous CoB/CNTs and CoBP/CNTs alloys with a range of molar ratios of P to （B ＋ P） were synthesized by means of induced chemical reduction method and evaluated as catalysts for PH3 decomposition. The catalysts were characterized using a number of analytical instrumentations including high-resolution transmission electron microscopy （HRTEM）, X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS）, surface area measurement （BET） and inductively coupled plasma （ICP）. The relationship between catalytic activities and physicochemcial and electronic properties of the catalysts was investigated. Results show that only CoP phase is formed on the CoBP/CNTs and it is found to be the more active phase for this reaction, whereas Co phase is formed on CoB/CNTs besides CoP phase; CoBP/CNTs have higher activities than CoB/CNTs and a maximum in activity is observed for CoBP/CNTs catalysts with molar ratio of P to （B＋P） being 0.43.

关 键 词：非晶态合金 碳纳米管 钴的磷化物 磷化氢分解 

分 类 号：O643.32[理学—物理化学]