NiPt/Pt多层纳米线优异的电催化甲醇甲酸性能  

Prominent activity towards methanol and formic acid electrooxidation from NiPt/Pt multilayered nanowires

作　　者：王兰芳 曹越越[1,2] 李晓丹 王艺 李宇嘉 WANG Lanfang;CAO Yueyue;LI Xiaodan;WANG Yi;LI Yujia(School of Chemistry and Materials Science, Shanxi Normal University, Linfen, Shanxi 041004, China;Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education), Shanxi Normal University, Linfen, Shanxi 041004, China)

机构地区：[1]山西师范大学化学与材料科学学院,山西临汾041004 [2]山西师范大学磁性分子与磁信息材料教育部重点实验室,山西临汾041004

出　　处：《中国科技论文》2021年第12期1283-1287,共5页China Sciencepaper

基　　金：山西师范大学研究生科技创新项目(2019XSY024)。

摘　　要：为了减少Pt催化剂在燃料电池催化过程中的使用量、增加其催化活性,选择储量丰富、成本低廉的过渡金属Ni与Pt复合,通过交替改变电沉积过程中的沉积电压,在多孔阳极氧化铝(porous anodic alumina,PAA)模板内制备NiPt/Pt多层纳米线阵列。利用扫描电子显微镜(scanning electron microscope,SEM)、透射电子显微镜(transmission electron microscope,TEM)和X射线衍射(X-ray diffraction,XRD)仪等对样品的形貌及结构进行剖析,用电化学工作站对其电催化甲醇、甲酸的性能进行研究。结果表明,NiPt/Pt多层纳米线阵列中,Pt片段和NiPt片段呈周期性排布,催化甲醇和甲酸时最大氧化电流分别为50.2 mA/cm^(2)和102.0 mA/cm^(2),比单质Pt纳米线展现出更强的催化活性,这种增强的催化活性可能源于多层结构导致的较多Pt催化活性位点及Ni、Pt金属间的协同催化作用。To reduce the dosage of Pt and enhance its catalytic activity in fuel cell catalysis,Ni was integrated into Pt due to its earth-abundant and low cost.NiPt/Pt multilayered nanowire arrays were electrodeposited in porous anodic alumina(PAA)template by alternating the deposition voltage.The morphologies and structures of samples were characterized by scanning electron microscope(SEM),transmission electron microscope(TEM)and X-ray diffraction(XRD).Electrochemical workstation was used to study their electrooxidation activities for methanol and formic acid.The results show that Pt segment and NiPt segments are arranged periodically in multilayered nanowires.The maximum oxidation currents of methanol and formic acid are 50.2 mA/cm^(2) and 102.0 mA/cm^(2),which exhibites enhanced catalytic activity than Pt nanowires.The enhanced catalytic activity may be due to the multiple catalytic active sites and the synergistic catalysis between metals Ni and Pt.

关 键 词：电化学 NiPt/Pt多层纳米线 协同电催化 甲醇甲酸 

分 类 号：O646.5[理学—物理化学]