One-Dimensional van der Waals Heterostructures as Efficient Metal-Free Oxygen Electrocatalysts

材料科学 异质结 金属 氧气 纳米技术 范德瓦尔斯力 化学物理 光电子学 化学 有机化学 分子 冶金
作者
Chang Liu,Fei Liu,Hao Li,Junsheng Chen,Jingyuan Fei,Zixun Yu,Ziwen Yuan,Chaojun Wang,Huiling Zheng,Zongwen Liu,Meiying Xu,Graeme Henkelman,Li Wei,Yuan Chen
出处
期刊:ACS Nano [American Chemical Society]
卷期号:15 (2): 3309-3319 被引量:117
标识
DOI:10.1021/acsnano.0c10242
摘要

Two-dimensional covalent organic frameworks (2D-COFs) may serve as an emerging family of catalysts with well-defined atomic structures. However, the severe stacking of 2D nanosheets and large intrinsic bandgaps significantly impair their catalytic performance. Here, we report coaxial one-dimensional van der Waals heterostructures (1D vdWHs) comprised of a carbon nanotube (CNT) core and a thickness tunable thienothiophene-pyrene COF shell using a solution-based in situ wrapping method. Density functional theory calculations and operando and ex situ spectroscopic analysis indicate that carbon–sulfur regions in thienothiophene groups in the COF serve as an active catalytic site for oxygen reduction and evolution reactions. The coaxial structure enables n-doping from the CNT core to the COF shell, which is controllable by varying COF shell thickness. The charge transfer from CNTs lowers COF's bandgap and work function, which reduces the charge transfer barrier between the active catalytic sites and adsorbed oxygen intermediates, resulting in dramatically enhanced catalytic activity. The 1D vdWHs were applied as a bifunctional oxygen electrocatalyst in rechargeable zinc–air batteries, delivering a high specific capacity of 696 mAh gZn–1 under a high current density of 40 mA cm–2 and excellent cycling stability. The 1D vdWHs based on the coaxial structure of 2D COF wrapped around CNT cores may be further used as versatile building units to create multidimensional vdWHs for exploring fundamental physics and chemistry as well as practical applications in electrochemistry, electronics, photonics, and beyond.
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
淡淡书文完成签到,获得积分10
1秒前
葛稀发布了新的文献求助10
1秒前
1秒前
ljs完成签到,获得积分10
2秒前
3秒前
3秒前
云之南完成签到,获得积分20
4秒前
情怀应助biubiudididi采纳,获得10
4秒前
YU发布了新的文献求助10
4秒前
Lucas应助Run采纳,获得10
4秒前
Qiao应助djbj2022采纳,获得80
4秒前
5秒前
莉莉子完成签到,获得积分10
5秒前
特西之魂完成签到 ,获得积分10
5秒前
万能图书馆应助aaa采纳,获得10
5秒前
糟糕的学姐完成签到,获得积分10
5秒前
小华发布了新的文献求助10
5秒前
清新的夜柳完成签到,获得积分10
6秒前
6秒前
6秒前
活力的秋莲完成签到,获得积分10
6秒前
ljxx发布了新的文献求助10
7秒前
SYLH应助刘强采纳,获得10
8秒前
pluto应助奋斗小公主采纳,获得10
8秒前
LLLLXR发布了新的文献求助10
8秒前
8秒前
小乐应助zhengmin采纳,获得30
9秒前
9秒前
10秒前
楚江南完成签到,获得积分10
10秒前
我爱亲柠檬完成签到,获得积分10
10秒前
11秒前
loomcool完成签到,获得积分10
11秒前
11秒前
郭泓嵩完成签到,获得积分10
12秒前
王倩的老公完成签到 ,获得积分10
12秒前
张星星完成签到 ,获得积分10
12秒前
vv发布了新的文献求助10
12秒前
刻苦熠彤关注了科研通微信公众号
12秒前
Jay发布了新的文献求助10
13秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Picture Books with Same-sex Parented Families: Unintentional Censorship 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
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 3969383
求助须知:如何正确求助?哪些是违规求助? 3514211
关于积分的说明 11172730
捐赠科研通 3249476
什么是DOI,文献DOI怎么找? 1794909
邀请新用户注册赠送积分活动 875441
科研通“疑难数据库(出版商)”最低求助积分说明 804827