甲苯
尖晶石
乙二醇
催化作用
纳米片
溶剂
吸附
X射线光电子能谱
八面体
催化氧化
材料科学
晶体结构
Crystal(编程语言)
无机化学
化学
化学工程
结晶学
有机化学
纳米技术
冶金
程序设计语言
工程类
计算机科学
作者
Jianrui Niu,Haobin Liu,Yiyuan Zhang,Xin Wang,Jiahuai Han,Zi-han Yue,Erhong Duan
出处
期刊:Chemosphere
[Elsevier]
日期:2020-11-01
卷期号:259: 127427-127427
被引量:33
标识
DOI:10.1016/j.chemosphere.2020.127427
摘要
Spinel oxides, e.g., NiCo2O4, is a promising catalyst for the catalytic oxidation of toluene. Understanding and designing versatile NiCo2O4 spinel is important for low-temperature toluene oxidation. Here, we investigated the surface-characteristic-dependent degradation activity of NiCo2O4 crystals through experiment and characterization. NiCo2O4 nanosheet using ethanol as solvent (named E--NiCo2O4) exposing {110} crystal planes exhibited the lowest temperature toluene oxidation. The T99 of toluene conversion was 256 °C, which is much lower than that of NiCo2O4 nanosheet using ethylene glycol as solvent (named EG--NiCo2O4), NiCo2O4 octahedron (named O--NiCo2O4) and NiCo2O4 truncated octahedron (named TO--NiCo2O4). Characterization using various techniques such as XRD, TEM, BET, XPS, H2-TPR and CO2-TPD showed that Co3+ and surface adsorbed oxygen (Osur) enriched surface, excellent redox properties and effective diffusion of the reaction product reasonably explain the enhancement in catalytic activity over the E--NiCo2O4. The research reveals that the effect of specific crystal planes and solvent was the key factor to govern the activity of low-temperature toluene oxidation.
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