Investigation on electrocatalytic performance and material degradation of an N-doped grapheneMOF nanocatalyst in emulated electrochemical environments

作     者：Niladri Talukder Yudong Wang Bharath Babu Nunna Xiao Tong Jorge Anibal Boscoboinik Eon Soo Lee 

作者机构：Advanced Energy Systems and Microdevices LaboratoryDepartment of Mechanical and Industrial EngineeringNew Jersey Institute of TechnologyNewarkNJ07102USA Department of Mechanical EngineeringWeber State UniversityOgdenUtah84408USA The Center for Functional NanomaterialsBrookhaven National LaboratoryUptonNew York 11973USA 

出 版 物：《Industrial Chemistry & Materials》 (工业化学与材料（英文）)

年 卷 期：2023年第1卷第3期

页      面：360-375页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：The authors acknowledge the research support from the Advanced Energy System and Microdevices (AESM) Laboratory at the New Jersey Institute of Technology (NJIT). This research used UHV-XPS and JEOL JSM-7600F SEM systems of Center for Functional Nanomaterials (CFN)  which is a U.S. Department of Energy Office of Science User Facility  at Brookhaven National Laboratory under Contract No. DE-SC0012704. The authors also the acknowledge the support from the Materials Characterization Laboratory at Otto H. York Center for Environmental Engineering and Science (YCEES) at New Jersey Institute of Technology where some of the experiments (XRD  SEM) were conducted 

主　　题：Nitrogen-doped graphene-based electrocatalyst Metal-organic framework Hydrogen peroxide effect on catalyst Electrocatalytic performance Material degradation 

摘      要：To develop graphene-based nanomaterials as reliable catalysts for electrochemical energy conversion and storage systems(*** fuel cells,metal–air batteries,etc.),it is imperative to critically understand their performance changes and correlated material degradation processes under different operational *** these systems,hydrogen peroxide(H_(2)O_(2))is often an inevitable byproduct of the catalytic oxygen reduction reaction,which can be detrimental to the catalysts,electrodes,and electrolyte ***,we studied how the electrocatalytic performance changes for a heterogeneous nanocatalyst named nitrogen-doped graphene integrated with a metal–organic framework(N-G/MOF)by the effect of H_(2)O_(2),and correlated the degradation process of the catalyst in terms of the changes in elemental compositions,chemical bonds,crystal structures,and *** catalyst samples were treated with five different concentrations of H_(2)O_(2) to emulate the operational conditions and examined to quantify the changes in electrocatalytic performances in an alkaline medium,elemental composition and chemical bonds,crystal structure,and *** electrocatalytic performance considerably declined as the H_(2)O_(2) concentration reached above 0.1 *** XPS analyses suggest the formation of different oxygen functional groups on the material surface,the breakdown of the material s C–C bonds,and a sharp decline in pyridinic-N functional groups due to gradually harsher H_(2)O_(2) *** higher concentrations,the H_(2)O_(2)-derived radicals altered the crystalline and morphological features of the catalyst.