CAJ | 학술논문

采用喷雾干燥法和焙烧处理制备中空介孔三氧化钨微球(HMTTS),在其表面进一步负载活性成分Pd,得到纳米Pd/HMTTS复合催化剂。采用X射线粉末衍射(XRD)、扫描电镜(SEM)和透射电镜(TEM)等对催化剂的形貌和晶型结构进行了表征。结果表明, Pd纳米粒子为面心立方晶体结构,均匀地分布在HMTTS表面。采用循环伏安和计时电流法研究了在酸性溶液中Pd/HMTTS催化剂对甲酸的电催化氧化性能,结果表明Pd/HMTTS催化剂比普通的三氧化钨载钯催化剂(Pd/WO3)对甲酸呈现出更高的电催化氧化活性和稳定性。 HMTTS独特的中空介孔结构和表面特性以及氢溢流效应有利于甲酸在钯表面的直接脱氢氧化过程的发生。
채용분무간조법화배소처리제비중공개공삼양화오미구(HMTTS),재기표면진일보부재활성성분Pd,득도납미Pd/HMTTS복합최화제。채용X사선분말연사(XRD)、소묘전경(SEM)화투사전경(TEM)등대최화제적형모화정형결구진행료표정。결과표명, Pd납미입자위면심립방정체결구,균균지분포재HMTTS표면。채용순배복안화계시전류법연구료재산성용액중Pd/HMTTS최화제대갑산적전최화양화성능,결과표명Pd/HMTTS최화제비보통적삼양화오재파최화제(Pd/WO3)대갑산정현출경고적전최화양화활성화은정성。 HMTTS독특적중공개공결구화표면특성이급경일류효응유리우갑산재파표면적직접탈경양화과정적발생。
Hol ow mesoporous tungsten trioxide microsphere (HMTTS) was synthesized by spay drying method and employed as the support material for Pd catalyst. The catalyst was characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The Pd nanoparticles had a face-centered cubic crystal structure and were wel dispersed on the external wal s of HMTTS. The as-prepared Pd/HMTTS catalyst exhibits higher electrocatalytic activity and good stability during formic acid oxidation in comparison to Pd/WO3 catalyst. The enhanced catalytic performance is attributed to the unique structure and surface properties of HMTTS and the hydrogen spil over effect which greatly accelerates the direct dehydrogenation of formic acid on pal adium.