材料科学与工程学报2025，Vol.43Issue(6)：875-880,6.DOI:10.14136/j.cnki.issn1673-2812.2025.06.001
高温氧化诱导单晶NiO纳米长方体的形成
High-temperature Oxidation-induced Formation of Single-crystal NiO Nanocuboids
摘要
Abstract
The oxidation of Ni nanoparticles can alter their physicochemical properties and consequently affect their service performance.Understanding the oxidation behavior of Ni nanoparticles at the atomic scale is critical for the efficient design and performance tuning of Ni-based nanomaterials.In this study,clean and spherical Ni nanoparticles were prepared via wet-chemical synthesis and in situ environmental transmission electron microscopy,and their high-temperature oxidation behavior under atmospheric-pressure conditions was investigated.Experimental results show that Ni nanoparticles are converted into single-crystal NiO nanocuboids exposing{100}facets by oxidation at 900℃.This morphology arises from the anisotropic growth of isolated oxide nuclei during oxidation,combined with surface reconstruction after the oxidation process.The reduced surface-adsorbed oxygen at high temperatures,along with the thermodynamic drive to lower surface energy,is considered the fundamental cause of this oxidation behavior.关键词
金属纳米颗粒氧化/原位环境电镜/Ni/NiO纳米颗粒/氧化动力学Key words
Oxidation of metal nanoparticles/In situ environmental TEM/Ni/NiO nanoparticles/Oxidation dynamics分类
社会科学引用本文复制引用
吴哲敏,尤瑞洋,姜颖,王勇..高温氧化诱导单晶NiO纳米长方体的形成[J].材料科学与工程学报,2025,43(6):875-880,6.基金项目
国家自然科学基金项目(52473242) （52473242）
浙江大学实验技术重点研究项目(SZD202401) （SZD202401）
浙江大学实验技术研究项目(SYBJS202507) （SYBJS202507）
