Kinetic analysis of TiO2-based photocatalysts sensitized with chlorophyll-derived dimers for light-driven hydrogen evolution

IF 9 2区 材料科学 Q1 CHEMISTRY, PHYSICAL Materials Today Energy Pub Date : 2024-06-22 DOI:10.1016/j.mtener.2024.101631
Tianfang Zheng, Aijun Li, Hongyu Tu, Lingyun Pan, Shin-ichi Sasaki, Xiao-Feng Wang
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Abstract

This study focuses on the kinetic analysis of chlorophyll-based dimer photosensitizers adsorbed on Pt/TiO photocatalyst for light-driven hydrogen evolution. To elucidate the detailed mechanism, four photosensitizers, a carboxylated chlorin () and its dimer derivatives connecting an accessory pigment of chlorin (), porphyrin (), and bacteriochlorin () were synthesized and their kinetic processes in photocatalytic hydrogen evolution were investigated. The results indicate that possesses the highest ability to produce photogenerated carriers, with an appropriate excited state lifetime, lowest propensity for charge recombination, and longest charge transfer lifetime. These favorable characteristics contribute to its exceptional photocatalytic activity compared with other photosensitizers. Specifically, the -sensitized Pt/TiO photocatalyst exhibits a remarkable hydrogen generation rate of 5.36 mmol/g/h. Moreover, these photosensitizers demonstrate excellent stability and multiple-experimental consistency. This study provides significant insights into the development of dyad photosensitizers and highlights their practical significance in the field of photocatalysis. By harnessing chlorophyll, we have successfully harnessed efficient and controlled hydrogen fuel generation through photocatalytic water splitting, thus paving the way for future advancements in clean and sustainable energy production.

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利用叶绿素衍生二聚体敏化二氧化钛光催化剂以实现光驱动氢气进化的动力学分析
本研究重点分析了吸附在铂/氧化钛光催化剂上的叶绿素基二聚体光敏剂在光驱动下进行氢气进化的动力学过程。为了阐明其详细机理,研究人员合成了四种光敏剂,分别是羧化叶绿素()及其二聚体衍生物,连接叶绿素()、卟啉()和细菌氯素()的辅助色素,并考察了它们在光催化氢气进化过程中的动力学过程。结果表明,氯素具有产生光生载流子的最高能力、适当的激发态寿命、最低的电荷重组倾向和最长的电荷转移寿命。与其他光敏剂相比,这些有利特性使其具有优异的光催化活性。具体来说,敏化铂/氧化钛光催化剂的氢气生成率高达 5.36 mmol/g/h。此外,这些光敏剂还表现出卓越的稳定性和多次实验的一致性。这项研究为开发二元光敏剂提供了重要启示,并凸显了它们在光催化领域的实际意义。通过利用叶绿素,我们成功地通过光催化水分裂高效、可控地生成了氢燃料,从而为未来清洁、可持续能源生产的进步铺平了道路。
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来源期刊
Materials Today Energy
Materials Today Energy Materials Science-Materials Science (miscellaneous)
CiteScore
15.10
自引率
7.50%
发文量
291
审稿时长
15 days
期刊介绍: Materials Today Energy is a multi-disciplinary, rapid-publication journal focused on all aspects of materials for energy. Materials Today Energy provides a forum for the discussion of high quality research that is helping define the inclusive, growing field of energy materials. Part of the Materials Today family, Materials Today Energy offers authors rigorous peer review, rapid decisions, and high visibility. The editors welcome comprehensive articles, short communications and reviews on both theoretical and experimental work in relation to energy harvesting, conversion, storage and distribution, on topics including but not limited to: -Solar energy conversion -Hydrogen generation -Photocatalysis -Thermoelectric materials and devices -Materials for nuclear energy applications -Materials for Energy Storage -Environment protection -Sustainable and green materials
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