揭示掺杂 Sm3+ 的 NiFe-LDH 作为高性能电催化剂在改进阴离子交换膜和水分离应用中的协同作用。

IF 10.7 2区 材料科学 Q1 CHEMISTRY, PHYSICAL
Sreenivasan Nagappan, Hemalatha Gurusamy, Harpriya Minhas, Arun Karmakar, S Ravichandran, Biswarup Pathak, Subrata Kundu
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引用次数: 0

摘要

有效的第一行过渡金属基电催化剂是大规模制氢和阴离子交换膜(AEM)水裂解装置的关键。本文介绍了泡沫镍表面的SmNi0.02Fe-LDH纳米片作为双功能电催化剂用于水裂解和AEM水电解研究。调整NiFe-LDH中的ni - fe比和掺杂Sm离子可以改善其电结构和本构活性。SmNi0.02Fe-LDH具有较高的析氧反应(OER), HER和TWS活性,在较低过电位(分别为230 mV, 95 mV和1.62 V)下达到10 mA cm - 2电流密度。在AEMWE细胞中,SmNi0.02Fe-LDH作为阴极和阳极对表现出出色的活性(2 V时0.9 a cm⁻2)和超过120 h的稳定性。密度泛函理论(DFT)研究表明,Sm掺杂在NiFe-LDH表面增强了其对OER和HER的双功能活性。这些发现强调了非贵金属复合材料在全水分解和AEMWE应用中长期水电解的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Unraveling the Synergistic Role of Sm3+ Doped NiFe-LDH as High-Performance Electrocatalysts for Improved Anion Exchange Membrane and Water Splitting Applications.

Effective first-row transition metal-based electrocatalysts are crucial for large-scale hydrogen energy generation and anion exchange membrane (AEM) devices in water splitting. The present work describes that SmNi0.02Fe-LDH nanosheets on nickel foam are used as a bifunctional electrocatalyst for water splitting and AEM water electrolyzer study. Tuning the Ni-to-Fe ratios in NiFe-LDH and doping with Sm ions improves the electrical structure and intrinsic activity. SmNi0.02Fe-LDH has higher oxygen evolution reaction (OER), HER, and TWS activity, achieving 10 mA cm⁻2 current density at lower overpotentials (230 mV, 95 mV, and 1.62 V, respectively). In AEMWE cells, SmNi0.02Fe-LDH as a cathode and anode pair exhibits outstanding activity (0.9 A cm⁻2 at 2 V) and stability over 120 h. Density Functional Theory (DFT) investigations reveal that the Sm doping in NiFe-LDH surface enhances its bifunctional activity toward OER and HER. These findings emphasize the potential of non-noble composites for long-term water electrolysis in total water splitting and AEMWE applications.

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来源期刊
Small Methods
Small Methods Materials Science-General Materials Science
CiteScore
17.40
自引率
1.60%
发文量
347
期刊介绍: Small Methods is a multidisciplinary journal that publishes groundbreaking research on methods relevant to nano- and microscale research. It welcomes contributions from the fields of materials science, biomedical science, chemistry, and physics, showcasing the latest advancements in experimental techniques. With a notable 2022 Impact Factor of 12.4 (Journal Citation Reports, Clarivate Analytics, 2023), Small Methods is recognized for its significant impact on the scientific community. The online ISSN for Small Methods is 2366-9608.
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