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IF 3.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science Pub Date : 2025-03-11 DOI:10.1007/s10853-025-10735-7

P. H. Ho, I. Z. Awan, N. Tanchoux, R. Arletti, S. Albonetti, F. Cavani, A. Martucci, H. Petitjean, D. Tichit, P. Benito, F. Di Renzo

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引用次数: 0

摘要

通过 X 射线衍射、元素分析、傅里叶变换红外光谱、TG-MS、N2 物理吸附和循环伏安法，对 Ni(OH)2 在不同温度和不同碳酸盐和硝酸盐阴离子含量下碱性沉淀形成的相进行了表征。从 α- 到 β-Ni(OH)2的脱水-去阴离子化过程会经过一个层间中间体IS-Ni(OH)2，在碳酸盐存在的情况下，IS-Ni(OH)2可在 80 ℃下稳定。制备 IS-Ni(OH)2 材料时，CO32-/Ni2+ 的比例范围为 0.05 至 0.16，从而产生了不同比例的层间化 α 和 β 相层。IS-Ni(OH)2 具有高达 200 °C 的热稳定性，呈现出一种奇特的墨水瓶介孔性，表面积高于 100 m2 g-1。基于这种材料的纹理特性和相对于 SCE 0.37 V 的可重现还原电位，它很有希望应用于电催化领域。热脱羟基-去离子化成 NiO 的 TG-MS 也显示了 Ni2+ 的易还原性，证明了与硝酸盐分解产生的氮氧化物反应形成的瞬时 Ni3+ 物种。

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Carbonates stabilize interstratified α/β intermediates in the preparation of nickel hydroxide

The phases formed by alkaline precipitation of Ni(OH)₂ at different temperatures and different levels of carbonate and nitrate anions have been characterized by X-ray diffraction, elemental analysis, FTIR spectroscopy, TG-MS, N₂ physisorption and cyclic voltammetry. The dehydration-deanionization of α- to β-Ni(OH)₂ passes through an interstratified intermediate IS-Ni(OH)₂, which can be stabilized at 80 °C in the presence of carbonates. IS-Ni(OH)₂ materials have been prepared with CO₃²⁻/Ni²⁺ ratio ranging from 0.05 to 0.16, resulting in different ratios of interstratified α and β phase layers. IS-Ni(OH)₂, thermally stable up to 200 °C, presents a peculiar ink-bottle mesoporosity and surface area higher than 100 m² g⁻¹. The material is promising for electrocatalytic applications on the basis of the textural properties and a reproducible reduction potential of 0.37 V versus SCE. The easily reversible reducibility of Ni²⁺ is also shown by the TG-MS of the thermal dehydroxylation-deanionization to NiO, evidencing transient Ni³⁺ species formed by reaction with NO_x emitted from the decomposition of nitrates.

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.