Preparation of a Pt-Ni_(2)P/NF catalyst for highly efficient hydrogen evolution using a magnetic field to promote Ni-Pt galvanic replacement
作者机构：School of MetallurgyNortheastern UniversityShenyang 110819China Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education)Northeastern UniversityShenyang 110819China Institute for Frontier Technologies of Low-Carbon Steelmaking and Liaoning Province Engineering Research Center for Technologies of Low-Carbon SteelmakingNortheastern UniversityShenyang 110819China The State Key Lab of Rolling and AutomationNortheastern UniversityShenyang 110819China Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education)(Ministry of Education)Northeastern UniversityShenyang 110819China
出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)
年 卷 期：2023年第142卷第11期
页 面：144-151页
核心收录：
学科分类：081702[工学-化学工艺] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：financially supported by the National Natural Science Foundation of China(Grant No.52274294) the Fundamental Research Funds for the Central Universities(Grant No.N2124007-1)
主 题：Magnetic field Regulation Galvanic replacement reaction HER
摘 要：The noble metal Pt is an ideal catalyst for promoting the hydrogen evolution reaction(HER)during the electrolysis of ***,Pt is also expensive and suffers from low utilization *** this work,a Pt-Ni_(2)P/NF nanorod catalyst with a low Pt loading was synthesized under different magnetic fields,and it was found that the application of a magnetic field can increase the rate of the galvanic replacement *** the magnetic field strength increases from 0 to 600 mT,the chemical reaction rate increases gradually,and the utilization rate of Pt increased by 2.3 times under 600 *** mechanism of the magnetic field-induced magnetohydrodynamic(MHD)effect on the galvanic replacement reaction was *** a 1 M KOH solution and at a current density of 10 mA cm^(-2),the overpotential of Pt-Ni_(2)P/NF prepared by applying a 600 mT magnetic field was as low as 15 mV and the Tafel slope was 37 mV dec^(-1),compared with values of 82 mV and 70 mV dec^(-1) for a specimen prepared without a magnetic ***,at an overpotential of 90 mV,the mass-based Pt activity of the former material was 12 times greater while its turnover frequency was 19 times *** work provides theoretical and technical knowledge expected to assist in the controllable preparation of materials in magnetic fields and the efficient utilization of metallic resources.
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