Ultra-small platinum nanoparticles segregated by nickle sites for efficient ORR and HER processes

作     者：Lvhan Liang Huihui jin Huang Zhou Bingshuai Liu Chenxi Hu Ding Chen Jiawei Zhu Zhe Wang Hai-Wen Li Suli Liu Daping He Shichun Mu Lvhan Liang;Huihui jin;Huang Zhou;Bingshuai Liu;Chenxi Hu;Ding Chen;Jiawei Zhu;Zhe Wang;Hai-Wen Li;Suli Liu;Daping He;Shichun Mu

作者机构：State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070HubeiChina Foshan Xianhu Laboratory of the Advanced Energy Science and TechnologyGuangdong LaboratoryXianhu Hydrogen ValleyFoshan 528200GuangdongChina Hubei Engineering Research Center of RF-Microwave Technology and ApplicationWuhan University of TechnologyWuhan 430070HubeiChina Platform of Inter/Transdisciplinary Energy ResearchInternational Research Center for Hydrogen EnergyInternational Institute for Carbon-Neutral Energy ResearchYushu UniversityFukuoka 819-0395Japan Key Laboratory of Advanced Functional Materials of NanjingNanjing Xiaozhuang UniversityNanjing 211171JiangsuChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2022年第31卷第2期

页      面：48-54页

核心收录：

学科分类：0808[工学-电气工程] 081705[工学-工业催化] 07[理学] 08[工学] 070205[理学-凝聚态物理] 0820[工学-石油与天然气工程] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 080501[工学-材料物理与化学] 0827[工学-核科学与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(22075223,51701146) the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing(Wuhan University of Technology)(2021-ZD-4) 

主　　题：Oxygen reduction reaction Hydrogen evolution reaction Zeolitic imidazolate frameworks Nickle site Pt nanoparticles 

摘      要：In the electrochemical process,Pt nanoparticles(NPs)in Pt-based catalysts usually agglomerate due to Oswald ripening or lack of restraint,ultimately resulting in reduction of the active sites and catalytic *** to uniformly disperse and firmly fix Pt NPs on carbon matrix with suitable particle size for catalysis is still a big ***,to prevent the agglomeration and shedding of Pt NPs,Ni species is introduced and are evenly dispersed in the surface of carbon matrix in the form of Ni-N-C active sites(Ni ZIF-NC).The Ni sites can be used to anchor Pt NPs,and then effectively limit the further growth and agglomeration of Pt NPs during the reaction *** with commercial Pt/C catalyst,Pt@Ni ZIF-NC,with ultralow Pt loading(7 wt%)and ideal particle size(2.3 nm),not only increases the active center,but also promotes the catalysis kinetics,greatly improving the ORR and HER catalytic *** acidic conditions,its half-wave potential(0.902 V)is superior to commercial Pt/C(0.861 V),and the mass activity(0.38 A per mg Pt)at 0.9 V is 4.7 times that of Pt/C(0.08 A per mg Pt).Besides,it also shows outstanding HER *** 20 and 30 mV,its mass activity is even 2 and 6 times that of Pt/C,*** it is under ORR or HER conditions,it still shows excellent *** undoubtedly indicate the realization of dual-functional catalysts with low-Pt and high-efficiency properties.