Influence of Cr3＋ doping on oxygen evolution reaction kinetics and photoluminescence properties of ZnSnO3 nanoparticles

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering B-advanced Functional Solid-state Materials Pub Date : 2024-09-25 DOI:10.1016/j.mseb.2024.117685

Vishwalinga Prasad B. , Ningappa C. , H.C. Manjunatha , Y.S. Vidya , S. Manjunatha , M. Shivanna , Daruka Prasad B. , Sahana R. , R. Munirathnam , K. Manjunatha , Sheng Yun Wu

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引用次数: 0

Abstract

Cr^3＋ doped ZnSnO₃ nanoparticles (NPs) are synthesized by using Aloe vera mediated solution combustion method and their luminescence and oxygen evolution reaction has been investigated. The Bragg reflections of ZnSnO₃:Cr (1–9 mol%) NPs exhibits cubic structure. The addition of the dopant induces the lattice strain and peak shifting towards higher angle is observed. Apart from that no other impurity related peaks were observed. The surface morphology consists irregular sized and shaped agglomerated NPs. The EDAX spectra confirms the purity of the sample. The estimated crystallite size decreases from 33 to 26 nm whereas optical band gap increases from 2.98 to 3.18 eV with increase in dopant concentration. The photoluminescence emission spectra was recorded at excitation wavelength 250 nm shows intense blue emission. Blue emission can be attributed to defect-level emission such as oxygen vacancies and 2E

\to

4A₂ transition of Cr^3＋ ions. The CIE coordinates lies well within the blue region. The average color correlated temperature was found to be 70238 K showing cooler appearance. This might finds an application in residential and commercial lighting, street lighting, stage lighting, fitness trackers and smartwatches etc. Further, Oxygen Evolution Reaction (OER) kinetics were carried out for ZnSnO₃:Cr (0, 1, 5 and 9 mol%) NPs. the OER activity which shows the over potential of 269, 263, 256, and 365 mV for the 0, 1, 5, 9 mol% Cr^3＋ doped ZnSnO₃ NPs. The Tafel slope observed for the ZnSnO₃:Cr (0, 1, 5, and 9 mol%) samples was found to be 76, 65, 90 and 249 mV/dec, indicating a Volmer–Heyrovsky mechanism. Additionally, chronoamperometry and Electrochemical impedance spectroscopy analysis were carried out. From these findings, ZnSnO₃:Cr (1,5 mol%) NPs is an highly efficient electrocatalysts for the oxygen evolution reaction (OER). Thus, the synthesized ZnSnO₃:Cr finds an application in the field of display technology and in energy storage devices.

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掺杂 Cr3＋对 ZnSnO3 纳米粒子氧进化反应动力学和光致发光特性的影响

利用芦荟介导的溶液燃烧法合成了掺杂 Cr3＋的 ZnSnO3 纳米粒子（NPs），并对其发光和氧进化反应进行了研究。ZnSnO3:Cr (1-9 mol%) NPs 的布拉格反射呈现立方结构。掺杂剂的加入导致了晶格应变，并观察到峰值向更高角度移动。除此之外，没有观察到其他与杂质有关的峰值。表面形态包括大小和形状不规则的团聚 NPs。EDAX 图谱证实了样品的纯度。随着掺杂剂浓度的增加，估计结晶尺寸从 33 纳米减小到 26 纳米，而光带隙则从 2.98 eV 增加到 3.18 eV。在激发波长为 250 nm 时记录的光致发光发射光谱显示出强烈的蓝色发射。蓝色发射可归因于缺陷级发射，如氧空位和 Cr3＋离子的 2E → 4A2 转变。CIE 坐标位于蓝色区域内。平均色彩相关温度为 70238 K，显示出较冷的外观。这可能会应用于住宅和商业照明、街道照明、舞台照明、健身追踪器和智能手表等。此外，还对 ZnSnO3:Cr（0、1、5 和 9 摩尔%）氮氧化物进行了氧进化反应（OER）动力学研究。OER 活性显示，掺杂 0、1、5、9 摩尔% Cr3＋的 ZnSnO3 氮氧化物的过电位分别为 269、263、256 和 365 mV。在 ZnSnO3:Cr（0、1、5 和 9 摩尔%）样品中观察到的塔菲尔斜率分别为 76、65、90 和 249 mV/dec，表明这是一种 Volmer-Heyrovsky 机制。此外，还进行了时变分析和电化学阻抗谱分析。从这些研究结果来看，ZnSnO3:Cr（1.5 摩尔%）纳米粒子是一种高效的氧进化反应（OER）电催化剂。因此，合成的 ZnSnO3:Cr 可应用于显示技术和储能设备领域。

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来源期刊

Materials Science and Engineering B-advanced Functional Solid-state Materials 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.