Zeyi Wang, Shuling Liu, Chenglong Wang, Dan Ren, Yanling Hu, Yujie Ma, Chao Wang
{"title":"Iron-doped nickel sulfide @ phosphate heterostructures nanosheets constructed by solvothermal P2S5 and layered double hydroxides for electrocatalytic oxygen evolution","authors":"Zeyi Wang, Shuling Liu, Chenglong Wang, Dan Ren, Yanling Hu, Yujie Ma, Chao Wang","doi":"10.1039/d4ta06350c","DOIUrl":null,"url":null,"abstract":"The design of efficient and active electrocatalysts for oxygen evolution reaction (OER) is crucial for renewable energy generation. Here, crystalline iron-doped nickel sulfide core, amorphous iron-doped nickel phosphate shell heterostructured nanosheets grown on nickel foam (Ni0.9Fe0.1S@NiFe(PO4)x/NF) are prepared by solvothermal reaction of nickel iron layered double hydroxides on NF (NiFe-LDH/NF) with P2S5. The heterogeneous interface induces the electronic interaction between the Ni0.9Fe0.1S and NiFe(PO4)x phases, that is beneficial for OER. The electrode exhibits excellent OER performance, requiring only a low overpotential of 208 mV and 246 mV at current densities of 10 mA cm−2 and 100 mA cm−2, respectively, and a low Tafel slope of 38.75 mV dec−1 in 1 M KOH. The OER mechanistic pathways of Ni0.9Fe0.1S@NiFe(PO4)x/NF and NiFe-LDH/NF both involve decoupled electron and proton transfer processes, and the contribution of lattice oxygen oxidation mechanism (LOM) is higher for Ni0.9Fe0.1S@NiFe(PO4)x/NF. The increase in the acidity of Ni sites leads to the enhanced participation of LOM for Ni0.9Fe0.1S@NiFe(PO4)x/NF. Additionally, the electrode also shows high long-term durability (150 h), with the transition of surface metal sulfides and phosphates to hydroxide and (oxy) hydroxide observed. This study provides a new idea for the development and design of heterogeneous oxygen evolution electrocatalytic materials.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":10.7000,"publicationDate":"2024-10-21","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/d4ta06350c","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
The design of efficient and active electrocatalysts for oxygen evolution reaction (OER) is crucial for renewable energy generation. Here, crystalline iron-doped nickel sulfide core, amorphous iron-doped nickel phosphate shell heterostructured nanosheets grown on nickel foam (Ni0.9Fe0.1S@NiFe(PO4)x/NF) are prepared by solvothermal reaction of nickel iron layered double hydroxides on NF (NiFe-LDH/NF) with P2S5. The heterogeneous interface induces the electronic interaction between the Ni0.9Fe0.1S and NiFe(PO4)x phases, that is beneficial for OER. The electrode exhibits excellent OER performance, requiring only a low overpotential of 208 mV and 246 mV at current densities of 10 mA cm−2 and 100 mA cm−2, respectively, and a low Tafel slope of 38.75 mV dec−1 in 1 M KOH. The OER mechanistic pathways of Ni0.9Fe0.1S@NiFe(PO4)x/NF and NiFe-LDH/NF both involve decoupled electron and proton transfer processes, and the contribution of lattice oxygen oxidation mechanism (LOM) is higher for Ni0.9Fe0.1S@NiFe(PO4)x/NF. The increase in the acidity of Ni sites leads to the enhanced participation of LOM for Ni0.9Fe0.1S@NiFe(PO4)x/NF. Additionally, the electrode also shows high long-term durability (150 h), with the transition of surface metal sulfides and phosphates to hydroxide and (oxy) hydroxide observed. This study provides a new idea for the development and design of heterogeneous oxygen evolution electrocatalytic materials.
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.