PbCrO4薄膜光阳极在不同电解质中太阳水氧化的活性和稳定性研究。

IF 3.9 2区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Jiahe Li, Yujie Huang, Haijun Wang, Minji Yang, Tao Han, Gaili Ke, Wenrong Wang, Hanmei Jiang and Huichao He*, 
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引用次数: 0

摘要

单斜PbCrO4是一种带隙为~ 2.2 eV的n型半导体,近年来作为太阳能水分解的光阳极材料备受关注,但很少有研究考虑PbCrO4光阳极的活性和稳定性与电解质的关系。本文采用滴注法制备了典型的单斜PbCrO4薄膜,并研究了其在硫酸钠(NSO)、磷酸盐缓冲盐水(PBS)、碳酸氢钾(KHCO)、硼酸钠(NBO)和邻苯二甲酸氢钾(KHP)水溶液中作为太阳能水分解的光阳极。发现PbCrO4薄膜光阳极的水氧化活性与电解质密切相关,在PBS和KHP中观察到相对较高的PbCrO4光阳极活性。然而,在这五种电解质中,由于存在光腐蚀、成分转化和溶解,PbCrO4薄膜光阳极的稳定性不理想,这对PbCrO4在太阳能水分解中的应用构成了重大挑战。在Na2SO3/KHP混合电解液中,PbCrO4膜光阳极可以获得改善的稳定光电流,将SO32-氧化为SO42-。本研究揭示了PbCrO4薄膜光阳极在典型电解质中的客观解水行为,可为PbCrO4及类似光阳极材料的研究提供有益的参考和提示。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Insight into the Activity and Stability Behaviors of the PbCrO4 Film Photoanode during Solar Water Oxidation in Different Electrolytes

Insight into the Activity and Stability Behaviors of the PbCrO4 Film Photoanode during Solar Water Oxidation in Different Electrolytes

Monoclinic PbCrO4 is an n-type semiconductor with a band gap of ∼2.2 eV, which has attracted research attentions as photoanode material for solar water splitting in recent years, but few works consider the correlation of PbCrO4 photoanodes’ activity and stability with electrolytes. Herein, typical monoclinic PbCrO4 films were prepared by a drop-casting method and investigated as photoanodes for solar water splitting in sodium sulfate (NSO), phosphate-buffered saline (PBS), potassium bicarbonate (KHCO), sodium borate (NBO), and potassium hydrogen phthalate (KHP) aqueous electrolyte. The water oxidation activity of the PbCrO4 film photoanode was found to be closely related to the electrolyte, and a relatively higher activity was observed on the PbCrO4 photoanode in PBS and KHP. However, in the five types of electrolytes, the PbCrO4 film photoanode had unsatisfactory stability due to the presence of photocorrosion, composition transformation, and dissolution, posing a significant challenge to the application of PbCrO4 in solar water splitting. In the Na2SO3/KHP mixing electrolyte, improved and stable photocurrent can be achieved on the PbCrO4 film photoanode for the oxidation of SO32– into SO42–. The present work reveals the objective water splitting behaviors of the PbCrO4 film photoanode in typical electrolytes, which could provide helpful reference and act as a reminder for the research of PbCrO4 and similar photoanode materials.

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来源期刊
Langmuir
Langmuir 化学-材料科学:综合
CiteScore
6.50
自引率
10.30%
发文量
1464
审稿时长
2.1 months
期刊介绍: Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).
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