Photocatalytic Overall Water Splitting over PbTiO3 Modulated by Oxygen Vacancy and Ferroelectric Polarization

光催化 化学 铁电性 氧气 极化(电化学) 分解水 氧化物 析氧 化学物理 材料科学 催化作用 物理化学 光电子学 电介质 电化学 有机化学 生物化学 电极
作者
Gedeng Wan,Lichang Yin,Xing Chen,Xiaoxiang Xu,Jie Huang,Chao Zhen,Huaze Zhu,Biaohong Huang,Weijin Hu,Zhaohui Ren,He Tian,Lianzhou Wang,Gang Liu,Hui‐Ming Cheng
出处
期刊:Journal of the American Chemical Society [American Chemical Society]
卷期号:144 (44): 20342-20350 被引量:124
标识
DOI:10.1021/jacs.2c08177
摘要

Ferroelectric materials hold great promise in the field of photocatalytic water splitting due to their spontaneous polarization that sets up an inherent internal field for the spatial separation of photogenerated charges. The ferroelectric polarization, however, is generally accompanied by some intrinsic defects, particularly oxygen vacancies, whose impact upon photocatalysis is far from being fully understood and modulated. Here, we have studied the role of oxygen vacancies over the photocatalytic behavior of single-domain PbTiO3 through a combination of theoretical and experimental viewpoints. Our results indicate that the oxygen vacancies in the negatively polarized facet (001) are active sites for water oxidation into O2, while the defect-free sites prefer H2O2 as the oxidation product. The apparent quantum yield at 435 nm for photocatalytic overall water splitting with PbTiO3/Rh/Cr2O3 is determined to be 0.025%, which is remarkable for single undoped metal oxide-based photocatalysts. Furthermore, the strong correlation among oxygen vacancies, polarization strength, and photocatalytic activity is properly reflected by charge separation conditions in the single-domain PbTiO3. This work clarifies the crucial role of oxygen vacancies during photocatalytic reactions of PbTiO3, which provides a useful guide to the design of efficient ferroelectric photocatalysts and their water redox reaction pathways.
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
ding应助lqkcqmu采纳,获得10
刚刚
刚刚
帅气书白发布了新的文献求助10
刚刚
CipherSage应助温水采纳,获得10
刚刚
科研通AI2S应助GIANTim采纳,获得10
刚刚
aa完成签到,获得积分10
1秒前
隐形曼青应助小浣熊采纳,获得10
1秒前
1秒前
1秒前
2秒前
2秒前
2秒前
沐沐完成签到,获得积分10
3秒前
3秒前
3秒前
ccc完成签到,获得积分10
4秒前
慕青应助喔啦采纳,获得20
5秒前
5秒前
cmccs发布了新的文献求助10
5秒前
6秒前
6秒前
老迟到的雪曼完成签到,获得积分10
6秒前
7秒前
7秒前
辛卫铎完成签到,获得积分10
7秒前
8秒前
8秒前
ZHANGCHAOHANG发布了新的文献求助50
8秒前
乐乐应助芒果采纳,获得10
8秒前
惊执虫儿完成签到,获得积分10
9秒前
cmccs完成签到,获得积分10
9秒前
9秒前
李山鬼发布了新的文献求助10
9秒前
BUHUIWAN完成签到,获得积分10
10秒前
SilsZ完成签到,获得积分10
11秒前
思源应助蔡军采纳,获得10
11秒前
知年完成签到,获得积分10
11秒前
Owen应助微笑的灭龙采纳,获得10
11秒前
高1完成签到,获得积分20
11秒前
lihaifeng发布了新的文献求助10
12秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 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
A Preliminary Study on Correlation Between Independent Components of Facial Thermal Images and Subjective Assessment of Chronic Stress 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 3970287
求助须知:如何正确求助?哪些是违规求助? 3515034
关于积分的说明 11176923
捐赠科研通 3250301
什么是DOI,文献DOI怎么找? 1795244
邀请新用户注册赠送积分活动 875732
科研通“疑难数据库(出版商)”最低求助积分说明 805039