{"title":"Electrochemical Synthesis Wormcast-like Pd-based Polycrystalline High Entropy Aggregates for Methanol Water Co-electrocatalysis","authors":"Yaxing Liu, Wenhao Ding, Jiaxin Liu, Guizhe zhao, Weiyin Li, Yaqing Liu","doi":"10.1039/d4ta06304j","DOIUrl":null,"url":null,"abstract":"High entropy compound (HEC) nanostructures have attracted considerable attention for various electrocatalysis reactions due to their unique physicochemical features by the adjustable multi-elemental synergy. However, there is a lack of focus on grain boundary engineering in HEC nanomaterials for enhanced electrocatalysis. Herein, wormcast-like PdFeCoNiCu polycrystalline high-entropy nanomaterials (PdFeCoNiCu-pHENs) are synthesized by a facile two-stage potential electrodeposition method. The as-synthesized PdFeCoNiCu-pHENs wormcast-like porous nanostructure enriches grain boundary defects, which exhibit superior electroactivity toward both hydrogen evolution reaction (HER) and methanol oxidation reaction (MOR), as well as the excellent MOR-coupled hydrogen production in alkaline. Benefiting from the electron synergistic effect of multi-element and the full distribution of massive grain boundary defects in novel wormcast-like polycrystalline aggregation, PdFeCoNiCu-pHENs exhibited great MOR (the specific activity of 52.5 mA·cm−2) and HER (the overpotential of 38.4 mV versus RHE at 10 mA·cm−2) electroactivities and efficient MOR-assisted hydrogen generation (the required cell voltage of 1.11 V at 100 mA·cm−2) ability. This study offers a new strategy to develop advantageous high-entropy electrocatalysts for efficient energy-saving hydrogen production.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":10.7000,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Chemistry A","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1039/d4ta06304j","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
High entropy compound (HEC) nanostructures have attracted considerable attention for various electrocatalysis reactions due to their unique physicochemical features by the adjustable multi-elemental synergy. However, there is a lack of focus on grain boundary engineering in HEC nanomaterials for enhanced electrocatalysis. Herein, wormcast-like PdFeCoNiCu polycrystalline high-entropy nanomaterials (PdFeCoNiCu-pHENs) are synthesized by a facile two-stage potential electrodeposition method. The as-synthesized PdFeCoNiCu-pHENs wormcast-like porous nanostructure enriches grain boundary defects, which exhibit superior electroactivity toward both hydrogen evolution reaction (HER) and methanol oxidation reaction (MOR), as well as the excellent MOR-coupled hydrogen production in alkaline. Benefiting from the electron synergistic effect of multi-element and the full distribution of massive grain boundary defects in novel wormcast-like polycrystalline aggregation, PdFeCoNiCu-pHENs exhibited great MOR (the specific activity of 52.5 mA·cm−2) and HER (the overpotential of 38.4 mV versus RHE at 10 mA·cm−2) electroactivities and efficient MOR-assisted hydrogen generation (the required cell voltage of 1.11 V at 100 mA·cm−2) ability. This study offers a new strategy to develop advantageous high-entropy electrocatalysts for efficient energy-saving hydrogen production.
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.