不同形貌银的制备及其电催化二氧化碳还原性能  

Preparation of Silver with Different Morphologies and its Electrocatalytic Carbon Dioxide Reduction Performance

作　　者：董羽 徐培程 丁钦 王寅[1,2] DONG Yu;XU Peicheng;DING Qin;WANG Yin(College of Chemistry and Materials,Inner Mongolia Minzu University,Tongliao 028043,China;Nano Innovation Institute,Inner Mongolia Minzu University,Tongliao 028043,China)

机构地区：[1]内蒙古民族大学化学与材料学院,内蒙古通辽028043 [2]内蒙古民族大学纳米创新研究院,内蒙古通辽028043

出　　处：《内蒙古民族大学学报（自然科学版）》2024年第5期20-26,共7页Journal of Inner Mongolia Minzu University：Natural Sciences Edition

基　　金：国家自然科学基金项目(22161036);内蒙古自治区自然科学基金项目(2023LHMS02006);内蒙古自治区直属高校青年拔尖人才培育项目(GXKY22064);内蒙古民族大学绿色光电催化功能分子转化团队资助项目。

摘　　要：通过精准调控方法合成了3种具有不同尺寸及微观形貌的银催化剂:银纳米花(Ag NFs)、银纳米球(Ag NSs)和银微米花(Ag MFs),通过扫描电子显微镜(SEM)、X-射线衍射(XRD)、X-射线光电子能谱(XPS)和物理吸附测试方法表征了3种银催化剂的组成和微观形貌。电催化CO_(2)还原测试结果表明,Ag NFs结构具有最高的CO选择性,在-0.3 V vs.RHE的电位下CO的法拉第效率(FECO)最高可以达到88%,这是由于NFs结构中褶皱部分可以提供更多的活性位点,并且纳米尺寸有利于传质和电子传输。This paper synthesized three silver catalysts with different sizes and microstructures through precise control methods:silver nanoflowers(Ag NFs),silver nanospheres(Ag NSs),and silver micro flowers(Ag MFs).The composition and microstructure of the three types of silver catalysts were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),and physical adsorption testing methods.The electrocatalytic CO2 reduction test results show that Ag NFs have the highest CO selectivity,the highest Faraday efficiency for CO(FECO)can reach up to 88%at a potential of-0.3 V vs.RHE.The good electrocatalytic performance is due to the fact that the wrinkled part of the NFs structure can provide more active sites,and the nano size is conducive to mass and electron transfer.

关 键 词：电催化剂 纳米结构 二氧化碳 一氧化碳 

分 类 号：O643[理学—物理化学]