摘要
将纯PtRh丝放置在NaOH溶液中,采用方波电势法可制备PtRh水溶胶。PtRh原子在方波电势搅动下被快速-氧化还原而发生重排,同时,在氢气的推动力下,PtRh丝得以分散。采用这种方法可在温和的条件下绿色合成清洁的PtRh纳米粒子(NPs),制备过程中无需任何前驱体金属离子和还原剂。采用扫描电子显微镜(SEM)、能谱分析(EDS)、高分辨透射电镜(HR-TEM)、X射线衍射(XRD)和X射线光电子能谱(XPS)对PtRh纳米溶胶进行了表征。PtRh纳米粒对甲醇氧化具有较高的电催化活性。
PtRh hydrosols have been synthesized by dispersing a pure PtRh wire in a NaOH solution with square wave potential(SWP).The rearrangements of superfacial PtRh atoms by repeated and fast electro-redox under the potential perturbations(PPs),coupling with the impetus of concurrent hydrogen gas.We are able to realize the green and facile synthesis of clean PtRh nanoparticles(NPs)requiring no any precursor ions and reducers in aqueous solution under mild conditions.The obtained nano-sols were characterized by scanning electron microscope(SEM),energy dispersive spectroscopy(EDS),high-resolution transmission electronic microscope(HR-TEM),X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS).The PtRh NPs exhibit high electrocatalytic activity toward the methanol oxidation.
作者
刘军
吴新华
周全
李容
刘绚艳
LIU Jun;WU Xin-hua;ZHOU Quan;LI Rong;LIU Xuan-yan(Department of Pharmaceutical and Biological Engineering,Hunan Chemical Vocational Technology College,Zhuzhou 412000,China)
出处
《化学研究与应用》
CAS
北大核心
2023年第2期355-360,共6页
Chemical Research and Application
基金
湖南省自科基金科教联合项目(2022JJ60043)资助。
关键词
PtRh纳米粒子
电势扰动
方波电势
电催化氧化
PtRh nanoparticles
potential perturbations
square wave potential
electrocatalytic oxidation
