Hierarchically skeletal multi-layered Pt-Ni nanocrystals for highly efficient oxygen reduction and methanol oxidation reactions

作     者：Shibo Li Zhi Qun Tian Yang Liu Zheng Jang Syed Waqar Hasan Xingfa Chen Panagiotis Tsiakaras Pei Kang Shen 李石波;田植群;刘洋;蒋政;哈森;陈兴发;帕纳斯;沈培康

作者机构：Collaborative Innovation Center of Sustainable Energy MaterialsGuangxi Key Laboratory of Electrochemical Energy MaterialsSchool of Chemistry and Chemical EngineeringGuangxi UniversityNanning 530004GuangxiChina Key Laboratory of New Processing Technology for Non-ferrous Metal and MaterialsMinistry of EducationGuangxi UniversityNanning 530004GuangxiChina Institute of High Temperature ElectrochemistryRASYekaterinburg 620990Russia Ural Federal University19 Mira Str.Yekaterinburg 620002Russia Laboratory of Alternative Energy Conversion SystemsDepartment of Mechanical EngineeringUniversity of ThessalyPedion Areos 38834Greece 

基　　金：国家重点研究开发计划(2017YFB0103001) 国家自然科学基金与福建省自然科学基金(U1705252) 广西科技项目(AA17204083,AB16380030) 广西研究生教育创新项目(YCBZ2019012) 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2021年第42卷第4期

页      码：648-657页

摘      要：Pt based materials are the most efficient electrocatalysts for the oxygen reduction reaction(ORR)and methanol oxidation reaction(MOR)in fuel *** the utilization of Pt based materials by modulating their morphologies to expose more active sites is a fundamental objective for the practical application of fuel ***,we report a new class of hierarchically skeletal Pt-Ni nanocrystals(HSNs)with a multi-layered structure,prepared by an inorganic acid-induced solvothermal *** addition of H_(2)SO_(4)to the synthetic protocol provides a critical trigger for the successful growth of Pt-Ni nanocrystals with the desired *** Pt-Ni HSNs synthesized by this method exhibit enhanced mass activity of 1.25 A mgpt−1 at 0.9 V(versus the reversible hydrogen electrode)towards ORR in 0.1-M HClO_(4),which is superior to that of Pt-Ni multi-branched nanocrystals obtained by the same method in the absence of inorganic acid;it is additionally 8.9-fold higher than that of the commercial Pt/C ***,it displays enhanced stability,with only 21.6%mass activity loss after 10,000 cycles(0.6–1.0 V)for ***,the Pt-Ni HSNs show enhanced activity and anti-toxic ability in CO for *** superb activity of the Pt-Ni HSNs for ORR and MOR is fully attributed to an extensively exposed electrochemical surface area and high intrinsic activity,induced by strain effects,provided by the unique hierarchically skeletal alloy *** novel open and hierarchical structure of Pt-Ni alloy provides a promising approach for significant improvements of the activity of Pt based alloy electrocatalysts.

主 题 词：Hierarchically skeletal Pt-Ni nanocrystals Self-assembly Solvent thermal method Oxygen reduction reaction Methanol oxidation reaction Fuel cells Activity 

学科分类：0808[工学-自动化类] 081705[081705] 07[理学] 0817[工学-轻工类] 08[工学] 070205[070205] 080501[080501] 080502[080502] 0805[工学-能源动力学] 0703[理学-化学类] 0702[理学-物理学类] 

核心收录：

D　O　I：10.1016/S1872-2067(20)63680-4

馆 藏 号：203986045...