Enhancement of MnTe electrocatalytic properties via Sm doping strategy employed for OER application

IF 3.2 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS Journal of Sol-Gel Science and Technology Pub Date : 2025-02-22 DOI:10.1007/s10971-025-06670-3

Aqsa Maheen, Sarah A. Alsalhi, Kiran Tahir, Abhinav Kumar, RSK Sharma, Piyus Kumar Pathak, Suman Saini, Vivek Kumar Pandey, Rajesh Haldhar

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Abstract

The primary focus for hydrogen (H₂) energy production is to develop economical and efficient catalysts. This study described hydrothermal synthesis of samarium (Sm) doped manganese telluride (MnTe) in which Sm-doping significantly improved MnTe’s OER performance in aqueous basic medium (1.0 M KOH). Several investigations revealed that Sm-doped MnTe had an orthorhombic structure, an outstanding surface area of 45 m²/g, and morphology of highly agglomerated nanoparticles. The optimized Sm-doped MnTe demonstrates best OER activity compared to pure MnTe exhibits a reduced OER onset potential of 1.44 V, overpotential (177 mV) at 10 mA/cm², minimal Tafel value (34 mV/dec), and small charge-transfer resistance (0.06 Ω) respectively. It demonstrates durability over a period of 40 h and retains stability even after completing 3000 cycles. These findings highlight that integration of rare-earth dopant samarium (Sm) into metal tellurides can be effective in improving their performance in optimizing the OER for energy conversion applications.

Graphical Abstract

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通过将 Sm 掺杂策略用于 OER，增强锰碲的电催化特性

氢（H2）能源生产的首要重点是开发经济高效的催化剂。本研究描述了水热合成钐（Sm）掺杂碲化锰（MnTe），其中Sm掺杂显著提高了MnTe在碱性水介质（1.0 M KOH）中的OER性能。多项研究表明，sm掺杂的MnTe具有正交结构，具有45 m2/g的优异表面积，并且具有高度团聚的纳米颗粒形态。与纯MnTe相比，优化后的sm掺杂MnTe表现出最佳的OER活性，其OER起始电位降低了1.44 V，过电位（177 mV）为10 mA/cm2， Tafel值最小（34 mV/dec），电荷转移电阻小（0.06 Ω）。它在40小时内表现出耐久性，即使在完成3000次循环后仍保持稳定性。这些发现突出表明，将稀土掺杂剂钐（Sm）集成到金属碲化物中可以有效地改善其性能，优化能量转换应用的OER。图形抽象

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来源期刊

Journal of Sol-Gel Science and Technology 工程技术-材料科学：硅酸盐

CiteScore

4.70

自引率

4.00%

发文量

280

审稿时长

2.1 months

期刊介绍： The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.