Merin Mary Sebastian, Ditty Dixon, T. Daniel Thangadurai, Nandakumar Kalarikkal, Alex Schechter
{"title":"NiFe2O4 in MoSe2 Exhibits Bifunctional Water Oxidation and Oxygen Reduction (OER and ORR) Catalytic Reactions for Energy Applications","authors":"Merin Mary Sebastian, Ditty Dixon, T. Daniel Thangadurai, Nandakumar Kalarikkal, Alex Schechter","doi":"10.1021/acsaem.4c01586","DOIUrl":null,"url":null,"abstract":"Highly active bifunctional oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) catalysts made of nickel ferrite (NiFe<sub>2</sub>O<sub>4</sub>) supported on molybdenum diselenide (MoSe<sub>2</sub>) nanosheets have been rigorously studied in our present work. The OER activity evaluation was conducted in an alkaline solution for all catalysts. The MoSe<sub>2</sub>@NiFe<sub>2</sub>O<sub>4</sub> (1:1) catalyst, which had shown superior activity compared to other catalysts, has an onset potential of 1.50 V vs reversible hydrogen electrode (RHE), similar to the state-of-the-art commercial IrO<sub>2</sub>. The ORR activity of the MoSe<sub>2</sub>@NiFe<sub>2</sub>O<sub>4</sub> electrocatalyst exhibited an ORR onset potential of 0.83 V vs RHE. We report the MoSe<sub>2</sub>@NiFe<sub>2</sub>O<sub>4</sub> bifunctional catalyst for noticeable activity in ORR and OER, with a potential difference (Δ<i>E</i>) of 0.92 V. In the accelerated test, after 5000 potential cycles, the MoSe<sub>2</sub>@NiFe<sub>2</sub>O<sub>4</sub> (1:1) catalyst had about 86% retention of the ORR diffusion-limiting current density. The OER depicts a loss of around 70.6% after 2000 cycles, which is significantly lower than that of the state-of-the-art IrO<sub>2</sub>, deactivated after 2000 cycles. Harnessing the excellent bifunctionality of our catalyst, we tested the catalyst in the Zn–air battery, which depicts 300 cycles. The Zn–air battery long-term cycling test was performed at 20 mA cm<sup>–2</sup> to assess the stability of the hybrid catalyst (30 min cycle<sup>–1</sup>), which exhibits a discharge voltage of 1.13 V and a charging voltage of 2.20 V. Considering the excellent bifunctional activity, the MoSe<sub>2</sub>@NiFe<sub>2</sub>O<sub>4</sub> heterostructured composite is an exceptional candidate for energy storage applications.","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":null,"pages":null},"PeriodicalIF":5.4000,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Energy Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1021/acsaem.4c01586","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Highly active bifunctional oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) catalysts made of nickel ferrite (NiFe2O4) supported on molybdenum diselenide (MoSe2) nanosheets have been rigorously studied in our present work. The OER activity evaluation was conducted in an alkaline solution for all catalysts. The MoSe2@NiFe2O4 (1:1) catalyst, which had shown superior activity compared to other catalysts, has an onset potential of 1.50 V vs reversible hydrogen electrode (RHE), similar to the state-of-the-art commercial IrO2. The ORR activity of the MoSe2@NiFe2O4 electrocatalyst exhibited an ORR onset potential of 0.83 V vs RHE. We report the MoSe2@NiFe2O4 bifunctional catalyst for noticeable activity in ORR and OER, with a potential difference (ΔE) of 0.92 V. In the accelerated test, after 5000 potential cycles, the MoSe2@NiFe2O4 (1:1) catalyst had about 86% retention of the ORR diffusion-limiting current density. The OER depicts a loss of around 70.6% after 2000 cycles, which is significantly lower than that of the state-of-the-art IrO2, deactivated after 2000 cycles. Harnessing the excellent bifunctionality of our catalyst, we tested the catalyst in the Zn–air battery, which depicts 300 cycles. The Zn–air battery long-term cycling test was performed at 20 mA cm–2 to assess the stability of the hybrid catalyst (30 min cycle–1), which exhibits a discharge voltage of 1.13 V and a charging voltage of 2.20 V. Considering the excellent bifunctional activity, the MoSe2@NiFe2O4 heterostructured composite is an exceptional candidate for energy storage applications.
期刊介绍:
ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.