A new concept in high performance ceria–zirconia oxygen storage capacity material with Al2O3 as a diffusion barrier

材料科学 粒径 微晶 催化作用 化学工程 立方氧化锆 耐久性 粒子(生态学) 扩散 氧气储存 化学 复合材料 冶金 有机化学 陶瓷 热力学 工程类 地质学 物理 海洋学
作者
Akira Morikawa,Tadashi Suzuki,Takaaki Kanazawa,Koichi Kikuta,Akihiko Suda,Hirofumi Shinjo
出处
期刊:Applied Catalysis B-environmental [Elsevier BV]
卷期号:78 (3-4): 210-221 被引量:176
标识
DOI:10.1016/j.apcatb.2007.09.013
摘要

CeO2–ZrO2 solid solution ((Ce,Zr)O2) is an indispensable oxygen storage capacity (OSC) material for emission control in gasoline-fuelled automobiles. The high performance OSC material developed in this study is composed of Al2O3 as "a diffusion barrier" and (Ce,Zr)O2 particles in intervening layers on a nanometer scale, and is abbreviated as "ACZ". The Brunauer–Emmett–Teller (BET) specific surface area (SSA) of ACZ after durability testing in air at 1000 °C was 20 m2/g, which is higher than that of conventional CZ (2 m2/g) composed of (Ce,Zr)O2 without Al2O3. After heat treatment at 1000 °C in air, the particle size of (Ce,Zr)O2 in ACZ was about 10 nm and that without Al2O3 was one-half of the size in pure CZ. The OSC was roughly characterized by the total capacity (OSC-c1) and the oxygen release rate (OSC-r). In a fresh catalyst, ACZ and CZ had almost the same OSC-c1; however, the OSC-r of ACZ was twice as fast as CZ. After durability testing, the OSC-r of both ACZ and CZ were reduced significantly, but the OSC-r of ACZ was about five times as fast as CZ. While the OSC-c1 was hardly influenced by the (Ce,Zr)O2 crystallite size and Pt particle size on the supports, the OSC-r was influenced by both of these parameters. The improvement of the OSC-r in the fresh catalyst and inhibition of the decrease in the OSC-r after durability testing were achieved by suppression of particle growth of (Ce,Zr)O2 in ACZ by introducing Al2O3 as a diffusion barrier with resultant inhibition of sintering of Pt particles.
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
PDF的下载单位、IP信息已删除 (2025-6-4)

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
懵懂的翼完成签到 ,获得积分10
1秒前
情怀应助hisingirl采纳,获得10
2秒前
LL发布了新的文献求助10
2秒前
量子星尘发布了新的文献求助10
3秒前
4秒前
可爱的函函应助西西采纳,获得10
5秒前
5秒前
8秒前
8秒前
9秒前
可爱的函函应助compass采纳,获得10
9秒前
酷波er应助ssss采纳,获得10
9秒前
xi发布了新的文献求助30
10秒前
酷波er应助MARY采纳,获得10
10秒前
恐龙完成签到 ,获得积分10
11秒前
11秒前
Cloud9发布了新的文献求助10
11秒前
我是老大应助nickthename采纳,获得10
11秒前
13秒前
15秒前
15秒前
16秒前
小猪跳水完成签到,获得积分20
16秒前
桐桐应助lll采纳,获得10
17秒前
奇怪的浮川完成签到,获得积分10
18秒前
shooin完成签到,获得积分10
18秒前
19秒前
19秒前
20秒前
20秒前
Jasper应助Abiy采纳,获得10
21秒前
21秒前
韩涵发布了新的文献求助10
22秒前
22秒前
尊敬代亦完成签到,获得积分10
22秒前
隐形曼青应助PEI采纳,获得10
23秒前
呆萌的土豆完成签到,获得积分10
23秒前
橙子发布了新的文献求助10
24秒前
nickthename发布了新的文献求助10
24秒前
26秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
热门求助领域 (近24小时)
化学 材料科学 医学 生物 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 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3976210
求助须知:如何正确求助?哪些是违规求助? 3520366
关于积分的说明 11203088
捐赠科研通 3256965
什么是DOI,文献DOI怎么找? 1798570
邀请新用户注册赠送积分活动 877738
科研通“疑难数据库(出版商)”最低求助积分说明 806516