Ahmed H. Al-Naggar, Vijaykumar V. Jadhav*, Shoyebmohamad F. Shaikh*, Raisuddin Ali and Rajaram S. Mane*,
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Benefiting from strong synergistic action, rich oxygen vacancies, oxidation behavior, transferred ion diffusion, and morphology, the 5 wt % Fe and Co-doped NiO electrode (5 wt % Fe–Co–NiO) exhibit a better specific capacitance of 5419.3 F g<sup>–1</sup> at a current density of 2 A g<sup>–1</sup>, which is better than that of the pristine NiO (530.4 F g<sup>–1</sup>). Similarly, a 5 wt % Fe–Co–NiO//5 wt % Fe–Co–NiO symmetric device provides a superb volumetric energy power density (47.9 Wh kg<sup>–1</sup>/545.8 WK g<sup>–1</sup>). It also demonstrates durable redox cycle life with 92.86% retention after 10,000 redox cycles scanned at a current density of 10 A g<sup>–1</sup>. At the same time, a panel consisting of 42 red light-emitting diodes (LEDs) with a voltage of approximately 1.5 V has been successfully illuminated for five min, exhibiting a high level of illumination intensity. This was accomplished by connecting two symmetric supercapacitor devices in series. This demonstrates the significance of the as-grown 5 wt % Fe–Co-doped NiO electrode for commercial applications. Furthermore, compared to the pristine NiO (680 mV and 146 mV s<sup>–1</sup>) catalyst, the 5 wt % Fe–Co–NiO electrocatalyst shows impressive intrinsic activity for the oxygen evolution reaction with an ultralow overpotential of 210 mV at 50 mA cm<sup>–2</sup> and a small Tafel slope of 85.6 mV dec<sup>–1</sup>, approving the importance of bimetallic ion doping in water splitting activity. Additionally, the 5 wt % Fe–Co-doped NiO nanostructured catalyst presents the highest turn-on-frequency (1.64 s<sup>–1</sup>) and electrochemically active surface area (84.75 mF cm<sup>–2</sup>) values, thus indicating the specific efficacy of each active site. Also, a 5 wt % Fe–Co-doped NiO catalyst has maintained steady performance for more than 115 h. This work offers a deep understanding of the impact of optimal bimetallic doping through the synergistic effect on energy storage and water splitting performance of the NiO electrode/catalyst for commercial practices.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"38 24","pages":"23699–23712 23699–23712"},"PeriodicalIF":5.3000,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhanced Charge Storage Performance and Electrocatalytic Oxygen Evolution Reaction Activity of Self-Grown Iron–Cobalt-Doped Nickel Oxide Nanoplates: An Example of the Synergistic Effect\",\"authors\":\"Ahmed H. Al-Naggar, Vijaykumar V. Jadhav*, Shoyebmohamad F. Shaikh*, Raisuddin Ali and Rajaram S. Mane*, \",\"doi\":\"10.1021/acs.energyfuels.4c0483210.1021/acs.energyfuels.4c04832\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >The synergistic electrochemical properties of a rational design transition metal oxide can improve its efficiency. However, the optimal synergistic effect of transition metal oxide nanostructures toward energy storage and conversion is still unsatisfactory. Herein, a simple, efficient wet chemical synthesis method is promoted for the incorporation of iron and cobalt ions into the nickel oxide matrix as (Fe–Co-doped NiO), with excellent high energy storage and electrocatalytic OER performance. Importantly, the correlation between varying amounts of Fe–Co-doped NiO electrodes and catalysts with different surface morphologies, crystallographic phases, and electrochemical activities was investigated. Benefiting from strong synergistic action, rich oxygen vacancies, oxidation behavior, transferred ion diffusion, and morphology, the 5 wt % Fe and Co-doped NiO electrode (5 wt % Fe–Co–NiO) exhibit a better specific capacitance of 5419.3 F g<sup>–1</sup> at a current density of 2 A g<sup>–1</sup>, which is better than that of the pristine NiO (530.4 F g<sup>–1</sup>). Similarly, a 5 wt % Fe–Co–NiO//5 wt % Fe–Co–NiO symmetric device provides a superb volumetric energy power density (47.9 Wh kg<sup>–1</sup>/545.8 WK g<sup>–1</sup>). It also demonstrates durable redox cycle life with 92.86% retention after 10,000 redox cycles scanned at a current density of 10 A g<sup>–1</sup>. At the same time, a panel consisting of 42 red light-emitting diodes (LEDs) with a voltage of approximately 1.5 V has been successfully illuminated for five min, exhibiting a high level of illumination intensity. This was accomplished by connecting two symmetric supercapacitor devices in series. This demonstrates the significance of the as-grown 5 wt % Fe–Co-doped NiO electrode for commercial applications. Furthermore, compared to the pristine NiO (680 mV and 146 mV s<sup>–1</sup>) catalyst, the 5 wt % Fe–Co–NiO electrocatalyst shows impressive intrinsic activity for the oxygen evolution reaction with an ultralow overpotential of 210 mV at 50 mA cm<sup>–2</sup> and a small Tafel slope of 85.6 mV dec<sup>–1</sup>, approving the importance of bimetallic ion doping in water splitting activity. Additionally, the 5 wt % Fe–Co-doped NiO nanostructured catalyst presents the highest turn-on-frequency (1.64 s<sup>–1</sup>) and electrochemically active surface area (84.75 mF cm<sup>–2</sup>) values, thus indicating the specific efficacy of each active site. Also, a 5 wt % Fe–Co-doped NiO catalyst has maintained steady performance for more than 115 h. 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引用次数: 0
摘要
合理设计过渡金属氧化物的协同电化学性能可以提高其效率。然而,过渡金属氧化物纳米结构对能量存储和转换的最佳协同效应仍然不理想。本文提出了一种简单、高效的湿法化学合成方法,将铁和钴离子掺入到氧化镍基体中,形成(fe - co -掺杂NiO),具有优异的高能量存储和电催化OER性能。重要的是,研究了不同fe - co掺杂量的NiO电极与具有不同表面形貌、晶相和电化学活性的催化剂之间的相关性。在2 a g-1电流密度下,5 wt % Fe - co - NiO电极(5 wt % Fe - co - NiO)的比电容为5419.3 F - 1,优于原始NiO电极(530.4 F - 1)。同样,5 wt % Fe-Co-NiO //5 wt % Fe-Co-NiO对称器件提供了极好的体积能量功率密度(47.9 Wh kg-1/545.8 WK g-1)。它还显示出持久的氧化还原循环寿命,在10 a g-1电流密度下扫描10,000次氧化还原循环后,保留率为92.86%。与此同时,一个由42个红色发光二极管(led)组成的面板,电压约为1.5 V,已经成功地照亮了5分钟,显示出高水平的照明强度。这是通过串联两个对称的超级电容器器件来实现的。这证明了5 wt % fe共掺杂NiO电极在商业应用中的重要性。此外,与原始NiO (680 mV和146 mV s-1)催化剂相比,5 wt % Fe-Co-NiO电催化剂在析氧反应中表现出令人惊讶的固有活性,在50 mA cm-2下过电位为210 mV, Tafel斜率较小,为85.6 mV dec1,证实了双金属离子掺杂在水裂解活性中的重要性。此外,5 wt % fe - co掺杂的NiO纳米结构催化剂具有最高的导通频率(1.64 s-1)和电化学活性表面积(84.75 mF cm-2)值,从而表明每个活性位点的特定功效。此外,5wt % fe - co掺杂的NiO催化剂在超过115小时的时间内保持稳定的性能。这项工作通过对NiO电极/催化剂的能量储存和水分解性能的协同效应,深入了解了最佳双金属掺杂对NiO电极/催化剂的影响。
Enhanced Charge Storage Performance and Electrocatalytic Oxygen Evolution Reaction Activity of Self-Grown Iron–Cobalt-Doped Nickel Oxide Nanoplates: An Example of the Synergistic Effect
The synergistic electrochemical properties of a rational design transition metal oxide can improve its efficiency. However, the optimal synergistic effect of transition metal oxide nanostructures toward energy storage and conversion is still unsatisfactory. Herein, a simple, efficient wet chemical synthesis method is promoted for the incorporation of iron and cobalt ions into the nickel oxide matrix as (Fe–Co-doped NiO), with excellent high energy storage and electrocatalytic OER performance. Importantly, the correlation between varying amounts of Fe–Co-doped NiO electrodes and catalysts with different surface morphologies, crystallographic phases, and electrochemical activities was investigated. Benefiting from strong synergistic action, rich oxygen vacancies, oxidation behavior, transferred ion diffusion, and morphology, the 5 wt % Fe and Co-doped NiO electrode (5 wt % Fe–Co–NiO) exhibit a better specific capacitance of 5419.3 F g–1 at a current density of 2 A g–1, which is better than that of the pristine NiO (530.4 F g–1). Similarly, a 5 wt % Fe–Co–NiO//5 wt % Fe–Co–NiO symmetric device provides a superb volumetric energy power density (47.9 Wh kg–1/545.8 WK g–1). It also demonstrates durable redox cycle life with 92.86% retention after 10,000 redox cycles scanned at a current density of 10 A g–1. At the same time, a panel consisting of 42 red light-emitting diodes (LEDs) with a voltage of approximately 1.5 V has been successfully illuminated for five min, exhibiting a high level of illumination intensity. This was accomplished by connecting two symmetric supercapacitor devices in series. This demonstrates the significance of the as-grown 5 wt % Fe–Co-doped NiO electrode for commercial applications. Furthermore, compared to the pristine NiO (680 mV and 146 mV s–1) catalyst, the 5 wt % Fe–Co–NiO electrocatalyst shows impressive intrinsic activity for the oxygen evolution reaction with an ultralow overpotential of 210 mV at 50 mA cm–2 and a small Tafel slope of 85.6 mV dec–1, approving the importance of bimetallic ion doping in water splitting activity. Additionally, the 5 wt % Fe–Co-doped NiO nanostructured catalyst presents the highest turn-on-frequency (1.64 s–1) and electrochemically active surface area (84.75 mF cm–2) values, thus indicating the specific efficacy of each active site. Also, a 5 wt % Fe–Co-doped NiO catalyst has maintained steady performance for more than 115 h. This work offers a deep understanding of the impact of optimal bimetallic doping through the synergistic effect on energy storage and water splitting performance of the NiO electrode/catalyst for commercial practices.
期刊介绍:
Energy & Fuels publishes reports of research in the technical area defined by the intersection of the disciplines of chemistry and chemical engineering and the application domain of non-nuclear energy and fuels. This includes research directed at the formation of, exploration for, and production of fossil fuels and biomass; the properties and structure or molecular composition of both raw fuels and refined products; the chemistry involved in the processing and utilization of fuels; fuel cells and their applications; and the analytical and instrumental techniques used in investigations of the foregoing areas.