Acetic acid-assisted mild dealloying of fine CuPd nanoalloys achieving compressive strain toward high-efficiency oxygen reduction and ethanol oxidation electrocatalysis
作者机构:State Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijingChina State Key Laboratory of Marine Resource Utilization in South China SeaHainan Provincial Key Lab of Fine ChemistrySchool of Chemical Engineering and TechnologyHainan UniversityHaikouChina Jiangsu Key Laboratory of New Power BatteriesSchool of Chemistry and Materials ScienceJiangsu Collaborative Innovation Centre of Biomedical Functional MaterialsNanjing Normal UniversityNanjingChina Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijingChina Nanjing IPE Institute of Green Manufacturing IndustryNanjingJiangsuChina
出 版 物:《Carbon Energy》 (碳能源(英文))
年 卷 期:2023年第5卷第7期
页 面:112-120页
核心收录:
学科分类:0808[工学-电气工程] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术]
基 金:the financial support provided by the National Natural Science Foundation of China(22075290,21972068,52164028) the Beijing Natural Science Foundation(Z200012) the State Key Laboratory of Multiphase Complex Systems the Institute of Process Engineering the Chinese Academy of Sciences(MPCS-2021-A-05) the Nanjing IPE Institute of Green Manufacturing Industry(E0010725)
主 题:compressive strain effect dealloying electrocatalysis ethanol oxidation reaction oxygen reduction reaction
摘 要:Dealloying by which the transition metal is partially or completely leached from an alloy precursor is an effective way to optimize the fundamental effects for further enhancing the electrocatalysis of a ***,to address the deficiencies associated with the commonly used dealloying methods,for example,electrochemical and sulfuric acid/nitric acid treatment,we report an acetic acid-assisted mild strategy to dealloy Cu atoms from the outer surface layers of CuPd alloy nanoparticles to achieve high-efficiency electrocatalysis for oxygen reduction and ethanol oxidation in an alkaline *** leaching of Cu atoms by acetic acid exerts an additional compressive strain effect on the surface layers and exposes more active Pd atoms,which is beneficial for boosting the catalytic performance of a dealloyed catalyst for the oxygen reduction reaction(ORR)and the ethanol oxidation reaction(EOR).In particular,for ORR,the CuPd nanoparticles with a Pd/Cu molar ratio of 2:1 after acetic dealloying show a half-wave potential of 0.912 V(***)and a mass activity of 0.213 AmgPd^(-1) at 0.9 V,respectively,while for EOR,the same dealloyed sample has a mass activity and a specific activity of 8.4 Amg^(-1) and 8.23 mA cm^(-2),respectively,much better than their dealloyed counterparts at other temperatures and commercial Pd/C as well as a Pt/C catalyst.