清晨好,您是今天最早来到科研通的研友!由于当前在线用户较少,发布求助请尽量完整的填写文献信息,科研通机器人24小时在线,伴您科研之路漫漫前行!

Effects of Ni substitution on active oxygen species and electronic interactions over La0.8Ce0.2MnO3/mesoporous ZSM-5 for oxidizing C6H14

氧化剂 催化作用 化学 介孔材料 煅烧 X射线光电子能谱 氧气 己烷 无机化学 价(化学) 化学工程 有机化学 工程类
作者
Jian Li,Yao Shi,Xiaoheng Fu,Yun Shu,Jiayu Huang,Jinwei Zhu,Gang Tian,Jingnan Hu
出处
期刊:Molecular Catalysis [Elsevier]
卷期号:499: 111309-111309 被引量:8
标识
DOI:10.1016/j.mcat.2020.111309
摘要

Based on fly ash, mesoporous ZSM-5 (MZ) molecular sieves were prepared using a combination of hydrothermal treatment and fractional calcination. The La0.8Ce0.2Mn1-yNiyO3/MZ(y≤0.5) obtained using an impregnation load method was studied regarding the hexane oxidation, which was chosen as the probe molecule of volatile organic compounds (VOCs) at 120−390 °C. Additionally, the physicochemical characteristics of the catalysts were characterized by XRD, SEM, TEM, BET, XPS, NH3-TPD, H2-TPR and O2-TPD to investigate the electronic interactions over La0.8Ce0.2MnO3/MZ with Ni substitution and the active oxygen species, the main influence factors and the reaction mechanism for hexane oxidation. The results showed that there was a strong electronic interaction between LaMnO3 and MZ, and Ni substitution at Mn sites in La0.8Ce0.2MnO3 could promote the electronic transfer among the La, Ce, Ni, Mn and MZ, which could improve the low temperature reducibility, as well as facilitate the migration and distribution of the surface oxygen species. Additionally, La0.8Ce0.2Mn0.5Ni0.5O3/MZ demonstrated a higher catalytic activity for hexane oxidation due to its higher migration capacity of the outer lattice oxygen species (O2−), indicating that the outer lattice oxygen species as the active oxygen species were the main factor for hexane oxidation corresponding to the Mars-Van Krevelen (MvK) reaction mechanism. However, the specific surface area, the low temperature reducibility of high valence state cation ions (Mn4+ and/or Ni4+/Ni3+) and the surface acidity could be key but not main factors in hexane oxidation. Furthermore, La0.8Ce0.2Mn1-yNiyO3/MZ (y≤0.5) showed good catalytic stability, coke deposition resistance and H2O resistance. Based on the results of in situ DRIFTS and GC–MS, two reaction routes of hexane oxidation could be proposed over the La0.8Ce0.2Mn1-yNiyO3/MZ (y≤0.5) catalysts in air, therein, the decomposition of carbonate species could be one of the main rate- controlling steps at ≤ 320 °C.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
2秒前
6秒前
10秒前
37秒前
41秒前
46秒前
52秒前
1分钟前
1分钟前
科研通AI2S应助liudy采纳,获得10
1分钟前
1分钟前
QiaoHL完成签到 ,获得积分10
1分钟前
1分钟前
2分钟前
2分钟前
2分钟前
3分钟前
十二完成签到 ,获得积分10
3分钟前
3分钟前
Airi发布了新的文献求助10
3分钟前
3分钟前
3分钟前
3分钟前
3分钟前
Ava应助Airi采纳,获得10
4分钟前
Tiger发布了新的文献求助10
4分钟前
Tiger完成签到,获得积分10
4分钟前
4分钟前
imi完成签到 ,获得积分10
4分钟前
4分钟前
4分钟前
5分钟前
5分钟前
5分钟前
Raunio完成签到,获得积分10
5分钟前
5分钟前
5分钟前
5分钟前
5分钟前
5分钟前
高分求助中
The Oxford Handbook of Social Cognition (Second Edition, 2024) 1050
Kinetics of the Esterification Between 2-[(4-hydroxybutoxy)carbonyl] Benzoic Acid with 1,4-Butanediol: Tetrabutyl Orthotitanate as Catalyst 1000
The Young builders of New china : the visit of the delegation of the WFDY to the Chinese People's Republic 1000
Rechtsphilosophie 1000
юрские динозавры восточного забайкалья 800
English Wealden Fossils 700
Handbook of Qualitative Cross-Cultural Research Methods 600
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3139610
求助须知:如何正确求助?哪些是违规求助? 2790479
关于积分的说明 7795355
捐赠科研通 2446958
什么是DOI,文献DOI怎么找? 1301526
科研通“疑难数据库(出版商)”最低求助积分说明 626259
版权声明 601176