Platinum nickel alloy-MXene catalyst with inverse opal structure for enhanced hydrogen evolution in both acidic and alkaline solutions  

作　　者：Wei kong Lihong Li Xiaoxia Yu Zhongyuan Xiang Yawei Cao Muhammad Tahir Zehua Lu Jinxia Deng Yanlin Song 

机构地区：[1]Key Laboratory of Green Printing,CAS Research/Education Centre for Excellence in Molecular Sciences,Institute of Chemistry Chinese Academy of Sciences(ICCAS),Beijing 100190,China [2]School of Chemistry and Biological Engineering,University of Science and Technology Beijing,Beijing 100083,China [3]State Key Laboratory of Digital Manufacturing Equipment and Technology,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Nano Research》2023年第1期195-201,共7页纳米研究（英文版）

基　　金：Thanks for the financial support of the National Key R&D Program of China(Nos.2021YFB3200700 and 2016YFC1100502);the National Natural Science Foundation of China(Nos.21875260 and 21671193);Beijing Nature Science Foundation(No.2202069);Zhongguancun Open Laboratory Concept Verification Project(No.202205229);the Foundation of State Key Laboratory of Digital Manufacturing Equipment and Technology(No.DMETKF2022004);the China Science and Technology Cloud for calculation support.

摘　　要：The development of an efficient Pt-based electrocatalyst in acidic and alkaline electrolytes is of great significance to the field of electrocatalytic hydrogen evolution.Herein,we report a strategy for in situ growth of Pt_(3)Ni truncated octahedrons on Ti3C2Tx nanosheets and then obtain an ordered porous catalyst via a template method.Meanwhile,we use the finite element calculation to clarify the relationship between the component structure and performance and find that the performance of the spherical shell microstructure catalyst is higher than that of the disc structure catalyst,which is also verified by experiments.The experimental analysis shows that the ordered porous catalyst is conducive to enhancing electrocatalytic hydrogen evolution activity in acidic and alkaline electrolytes.In an acidic solution,the overpotential is 25 mV(10 mA·cm^(−2)),and the Tafel slope is 22.86 mV·dec−1.In an alkaline solution,the overpotential is 44.1 mV(10 mA·cm^(−2)),and the Tafel slope is 39.06 mV·dec−1.The synergistic coupling between Ti3C2Tx and Pt_(3)Ni nanoparticles improves the stability of the catalyst.The in situ growth strategy and design of microstructure with its correlation with catalytic performance represent critical steps toward the rational synthesis of catalysts with excellent catalytic activity.

关 键 词：hydrogen evolution reaction MXene Pt_(3)Ni truncated octahedrons ordered porous structures 

分 类 号：O64[理学—物理化学]