气候变化领域集成服务门户(CCPortal): Modulating multi-hole reaction pathways for photoelectrochemical water oxidation on gold nanocatalysts

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DOI	10.1039/c9ee04192c
	Modulating multi-hole reaction pathways for photoelectrochemical water oxidation on gold nanocatalysts
	Zhang Y.; Zhang Y.; Guo W.; Johnston-Peck A.C.; Hu Y.; Song X.; Wei W.D.
发表日期	2020
ISSN	17545692
起始页码	1501
结束页码	1508
卷号	13 期号:5
英文摘要	Natural photosynthesis utilizes a redox cascade consisting of enzymes and molecular mediators that trap and stabilize hot carriers to achieve efficient multiple charge transfer. In this aspect, great challenges are facing artificial photochemistry regarding the extremely short lifetimes of photo-generated hot carriers. Herein, using Au nanoparticle photocatalysts as a model, we report that photoelectrodeposited catechol molecules on Au/TiO2 heterostructures trap and stabilize photo-generated hot holes on Au and further introduce a new multi-hole reaction pathway in which those long-lived catechol-trapped holes cooperate with newly generated holes on Au. The new mechanism boosts photoelectrochemical water oxidation on Au by one order of magnitude. Our study illustrates a strategy to integrate metal nanoparticles, semiconductors, and molecular redox mediators to effectively separate charge carriers and harvest hot holes for driving photochemical reactions. © The Royal Society 2020 of Chemistry.
英文关键词	Carrier mobility; Charge transfer; Electrochemistry; Gold; Hot carriers; Metal nanoparticles; Nanocatalysts; Phenols; Photochemical reactions; Redox reactions; Au nanoparticle; Molecular redox; Multi holes; Multiple charge; New mechanisms; Photoelectrochemical water oxidation; Reaction pathways; Redox cascades; Gold nanoparticles; catalysis; catalyst; chemical reaction; electrochemical method; gold; nanoparticle; oxidation; photochemistry; water treatment
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189720
作者单位	Department of Chemistry, Center for Catalysis, University of Florida, Gainesville, FL 32611, United States; Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973, United States
推荐引用方式 GB/T 7714	Zhang Y.,Zhang Y.,Guo W.,et al. Modulating multi-hole reaction pathways for photoelectrochemical water oxidation on gold nanocatalysts[J],2020,13(5).
APA	Zhang Y..,Zhang Y..,Guo W..,Johnston-Peck A.C..,Hu Y..,...&Wei W.D..(2020).Modulating multi-hole reaction pathways for photoelectrochemical water oxidation on gold nanocatalysts.Energy & Environmental Science,13(5).
MLA	Zhang Y.,et al."Modulating multi-hole reaction pathways for photoelectrochemical water oxidation on gold nanocatalysts".Energy & Environmental Science 13.5(2020).