Construction of ternary TiO2/CdS/IrO2 heterostructure photoanodes for efficient glycerol oxidation coupled with hydrogen evolution†

IF 3.5 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR
Chenfeng Jiang, Yibo Ding, Jiayu Lin, Yi Sun, Wei Zhou, Xiaoyan Zhang, Hongbin Zhao, Weimin Cao and Danhong Cheng
{"title":"Construction of ternary TiO2/CdS/IrO2 heterostructure photoanodes for efficient glycerol oxidation coupled with hydrogen evolution†","authors":"Chenfeng Jiang, Yibo Ding, Jiayu Lin, Yi Sun, Wei Zhou, Xiaoyan Zhang, Hongbin Zhao, Weimin Cao and Danhong Cheng","doi":"10.1039/D4DT03048F","DOIUrl":null,"url":null,"abstract":"<p >A TiO<small><sub>2</sub></small>/CdS heterostructure has been widely investigated as a potential photoanode for photoelectrochemical (PEC) water splitting for hydrogen evolution. However, the efficiency and stability still remain challenging due to the sluggish reaction dynamics for water oxidation and easy photocorrosion of CdS. Here we report a ternary TiO<small><sub>2</sub></small>/CdS/IrO<small><sub>2</sub></small> heterostructure with IrO<small><sub>2</sub></small> as a hole transport layer for PEC glycerol oxidation coupled with hydrogen evolution. The photocurrent density of the optimized TiO<small><sub>2</sub></small>/CdS photoanode is 18.8 mA cm<small><sup>−2</sup></small> (1.23 V <em>vs</em>. RHE), which is about 10.6 times higher than that of the pristine TiO<small><sub>2</sub></small>. It is found that most of the glycerol was converted to formic acid (FA) on the TiO<small><sub>2</sub></small>/CdS surface with a production rate of ∼603.0 mmol m<small><sup>−2</sup></small> h<small><sup>−1</sup></small>. The average H<small><sub>2</sub></small> production rate reaches 1574.5 mmol m<small><sup>−2</sup></small> h<small><sup>−1</sup></small>. After loading IrO<small><sub>2</sub></small> nanoparticles, the products for glycerol oxidation remain unchanged with the production rate of FA reaching 863.4 mmol m<small><sup>−2</sup></small> h<small><sup>−1</sup></small>, while the hydrogen production rate is increased to 2345.2 mmol m<small><sup>−2</sup></small> h<small><sup>−1</sup></small> due to the improved stability. The results show that the obtained TiO<small><sub>2</sub></small>/CdS/IrO<small><sub>2</sub></small> heterostructure can effectively oxidize glycerol to value-added chemicals. The enhanced PEC performance and stability of the TiO<small><sub>2</sub></small>/CdS/IrO<small><sub>2</sub></small> photoanode can be ascribed to the greatly enhanced electrode/electrolyte interfacial carrier injection efficiency, caused by the fast glycerol oxidation dynamics and intimate contact. This work provides novel ideas to construct high-efficiency PEC systems for both clean energy production and high-value chemicals.</p>","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":" 6","pages":" 2460-2470"},"PeriodicalIF":3.5000,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Dalton Transactions","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/dt/d4dt03048f","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0

Abstract

A TiO2/CdS heterostructure has been widely investigated as a potential photoanode for photoelectrochemical (PEC) water splitting for hydrogen evolution. However, the efficiency and stability still remain challenging due to the sluggish reaction dynamics for water oxidation and easy photocorrosion of CdS. Here we report a ternary TiO2/CdS/IrO2 heterostructure with IrO2 as a hole transport layer for PEC glycerol oxidation coupled with hydrogen evolution. The photocurrent density of the optimized TiO2/CdS photoanode is 18.8 mA cm−2 (1.23 V vs. RHE), which is about 10.6 times higher than that of the pristine TiO2. It is found that most of the glycerol was converted to formic acid (FA) on the TiO2/CdS surface with a production rate of ∼603.0 mmol m−2 h−1. The average H2 production rate reaches 1574.5 mmol m−2 h−1. After loading IrO2 nanoparticles, the products for glycerol oxidation remain unchanged with the production rate of FA reaching 863.4 mmol m−2 h−1, while the hydrogen production rate is increased to 2345.2 mmol m−2 h−1 due to the improved stability. The results show that the obtained TiO2/CdS/IrO2 heterostructure can effectively oxidize glycerol to value-added chemicals. The enhanced PEC performance and stability of the TiO2/CdS/IrO2 photoanode can be ascribed to the greatly enhanced electrode/electrolyte interfacial carrier injection efficiency, caused by the fast glycerol oxidation dynamics and intimate contact. This work provides novel ideas to construct high-efficiency PEC systems for both clean energy production and high-value chemicals.

Abstract Image

三元TiO2/CdS/IrO2异质结构光阳极的构建及其对甘油的高效氧化和析氢作用
TiO2/CdS异质结构作为光电化学(PEC)水裂解析氢的潜在光阳极被广泛研究。然而,由于CdS的水氧化反应动力学缓慢且容易光腐蚀,其效率和稳定性仍面临挑战。本文报道了一种TiO2/CdS/IrO2三元异质结构,其中IrO2作为PEC甘油氧化耦合析氢的空穴传输层。优化后的TiO2/CdS光阳极的光电流密度为18.8 mA cm-2 (1.23 V vs. RHE),是原始TiO2的10.6倍。结果表明,大部分甘油在TiO2/CdS表面转化为甲酸(FA),产率为603.0 mmol m-2 h-1。平均产氢速率达到1574.5 mmol m-2 h-1。负载IrO2纳米颗粒后,甘油氧化产物保持不变,FA的产率达到863.4 mmol m-2 h-1,而氢气的产率由于稳定性的提高而提高到2345.2 mmol m-2 h-1。结果表明,制备的TiO2/CdS/IrO2异质结构能有效地将甘油氧化为高附加值化学品。TiO2/CdS/IrO2光阳极的PEC性能和稳定性的增强可归因于快速甘油氧化动力学和密切接触导致的电极/电解质界面载流子注入效率的大大提高。本研究为清洁能源生产和高价值化学品高效PEC系统的构建提供了新的思路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Dalton Transactions
Dalton Transactions 化学-无机化学与核化学
CiteScore
6.60
自引率
7.50%
发文量
1832
审稿时长
1.5 months
期刊介绍: Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信