Accurate design of spatially separated double active site in Bi4NbO8Cl single crystal to promote Z - Scheme photocatalytic overall water splitting

光催化 分解水 氧化还原 材料科学 光化学 电解水 催化作用 反应速率 活动站点 辐照 化学 无机化学 物理化学 电极 电解 物理 电解质 生物化学 核物理学
作者
Kailong Gao,Hongxia Guo,Yanan Hu,Hongbin He,Mowen Li,Xiaoming Gao,Feng Fu
出处
期刊:Journal of Energy Chemistry [Elsevier BV]
卷期号:87: 568-582 被引量:21
标识
DOI:10.1016/j.jechem.2023.08.038
摘要

The efficiency of photocatalytic overall water splitting was mainly limited by the slow reaction kinetics of water oxidation. How to design effective surface active site to overcome the slow water oxidation reaction was a major challenge. Here, we propose a strategy to accelerate surface water oxidation through the fabrication spatially separated double active sites. FeCoPi/Bi4NbO8Cl-OVs photocatalyst with spatially separated double active site was prepared by hydrogen reduction photoanode deposition method. Due to the high matching of the spatial loading positions of FeCoPi and OVs with the photogenerated charge distribution of Bi4NbO8Cl and corresponding reaction mechanisms of substrate, the FeCoPi and OVs on the (001) and (010) crystal planes of Bi4NbO8Cl photocatalyst provided surface active site for water oxidation reaction and electron shuttle reaction (Fe3+/Fe2+), respectively. Under visible light irradiation, the evolution O2 rate of FeCoPi/Bi4NbO8Cl OVs was 16.8 μmol h−1, as 32.9 times as Bi4NbO8Cl. Furthermore, a hydrogen evolution co-catalyst PtRu@Cr2O3 was prepared by sequential photodeposition method. Due to the introduction of Ru, the Schottky barrier between PbTiO3 and Pt was effectively reduced, which promoted the transfer of photogenerated electrons to PtRu@Cr2O3 thermodynamically, the evolution H2 rate on PtRu@Cr2O3/PbTiO3 increased to 664.8 times. On based of the synchronous enhancement of the water oxidation performance on FeCoPi/Bi4NbO8Cl-OVs and water reduction performance on PtRu@Cr2O3/PbTiO3, a novel Z - Scheme photocatalytic overall water splitting system (FeCoPi/Bi4NbO8Cl-OVs) mediated by Fe3+/Fe2+ had successfully constructed. Under visible light irradiation, the evolution rates of H2 and O2 were 2.5 and 1.3 μmol h−1, respectively. This work can provide some reference for the design of active site and the controllable synthesis of OVs spatial position. On the other hand, the hydrogen evolution co catalyst (PtRu@Cr2O3) and the co catalyst FeCoPi for oxygen evolution contributed to the construction of an overall water splitting system.
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
2秒前
小猪完成签到,获得积分10
2秒前
4秒前
萌面大侠完成签到,获得积分10
4秒前
4秒前
金枪鱼完成签到,获得积分10
5秒前
sssssssssss完成签到,获得积分10
5秒前
mary发布了新的文献求助10
7秒前
研友_VZG7GZ应助hahaha123213123采纳,获得10
7秒前
枕星发布了新的文献求助10
9秒前
9秒前
10秒前
10秒前
求求大家了完成签到,获得积分10
10秒前
阳光完成签到,获得积分10
10秒前
Crystal完成签到 ,获得积分10
12秒前
13秒前
13秒前
14秒前
14秒前
14秒前
乐乐应助赖道之采纳,获得10
15秒前
15秒前
Sun_Chen完成签到,获得积分10
15秒前
体贴凌柏发布了新的文献求助10
16秒前
成就的笑南完成签到 ,获得积分10
16秒前
17秒前
17秒前
wyw123完成签到,获得积分10
17秒前
求大佬帮助完成签到,获得积分10
17秒前
李健的小迷弟应助zyq采纳,获得10
18秒前
陈隆完成签到,获得积分10
18秒前
哎呀完成签到 ,获得积分10
18秒前
量子星尘发布了新的文献求助10
19秒前
mary完成签到,获得积分10
19秒前
19秒前
朱成豪发布了新的文献求助10
21秒前
deallyxyz应助科研通管家采纳,获得10
21秒前
科目三应助科研通管家采纳,获得10
21秒前
大个应助科研通管家采纳,获得10
21秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds.Vol2 1100
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
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 4038368
求助须知:如何正确求助?哪些是违规求助? 3576068
关于积分的说明 11374313
捐赠科研通 3305780
什么是DOI,文献DOI怎么找? 1819322
邀请新用户注册赠送积分活动 892672
科研通“疑难数据库(出版商)”最低求助积分说明 815029