Catalytic Performance of CuCo/BNNSs Nanocatalysts for Hydrolysis of Solid State Hydrogen Storage Material Ammonia Borane
翟佳欣 河北工业大学化工学院, 天津 300130  
李国华 河北工业大学化工学院, 天津 300130 
甘思平 河北工业大学化工学院, 天津 300130  
张雪明 河北工业大学化工学院, 天津 300130  
朱萌萌 河北工业大学化工学院, 天津 300130  
张晓蕊 河北工业大学化工学院, 天津 300130  
胡恩言 河北工业大学化工学院, 天津 300130  
摘要: 采用共还原法将CuCo双金属负载到通过聚乙烯吡咯烷酮(PVP)辅助离子插层法制备的少层氮化硼纳米片(BNNSs)上,获得了平均粒径为2.7 nm且高度分散的铜钴/氮化硼纳米片(CuCo/BNNSs)纳米催化剂。通过原子力显微镜(AFM)、X射线衍射(XRD)、傅里叶转换红外光谱(FTIR)、拉曼光谱(Raman)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)和高分辨率透射电镜(HRTEM)对载体及催化剂的结构及形貌进行表征,并研究了CuCo/BNNSs的催化性能。研究发现,由于Cu、Co、BNNSs和OH-之间高效的四重效应协同使得Cu0.5Co0.5/BNNSs纳米催化剂在室温、pH=14条件下对氨硼烷(AB,NH3BH3)水解释氢具有极高的催化活性。转化频率(TOF)值达到104.52 molH2·molmetal-1·min-1,且CuCo/BNNSs纳米催化剂具有良好的稳定性,6次循环利用后仍保持较高催化活性。
关键词: 氮化硼纳米片  CuCo合金  负载型催化剂  协同效应  氨硼烷  制氢
Abstract: CuCo bimetallic nanoparticles were supported on few layer boron nitride nanosheets (BNNSs) prepared by polyvinylpyrrolidone (PVP)-assisted ion intercalation, and a highly dispersed copper-cobalt/boron nitride nanosheets (donated as CuCo/BNNSs) nanocatalyst with an average particle size of 2.7 nm was obtained with a method of co-reduction. The structure and morphology of the carrier and catalyst were characterized by atomic force microscope (AFM), X-ray diffraction (XRD), fourier transform infrared (FTIR), Raman spectra (Raman), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and high resolution transmission electron microscopy (HRTEM), and the catalytic performance of CuCo/BNNSs was studied. The results showed that Cu0.5Co0.5/BNNSs nanocatalysts exhibited high catalytic activity towards the hydrolysis of ammonia borane (AB, NH3BH3) at room temperature when pH value was 14 and the turn over frequency (TOF) reached 104.52 molH2·molmetal-1·min-1 due to the highly efficient quadruple synergistic effect between Cu, Co, BNNSs and OH-. Moreover, the CuCo/BNNSs nanocatalyst also had good stability and high catalytic activity was maintained after 6 cycles.
Keywords: boron nitride nanosheets  CuCo alloys  supported catalysts  cooperative effects  ammonia borane  hydrogen production
投稿时间:2019-07-19 修订日期:2019-11-09
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