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Title: Self-Assembled Framework Enhances Electronic Communication of Ultrasmall-Sized Nanoparticles for Exceptional Solar Hydrogen Evolution

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.6b12976· OSTI ID:1372067

Colloidal quantum dots (QDs) have demonstrated great promise in artificial photosynthesis. However, the ultrasmall size hinders its controllable and effective interaction with cocatalysts. To improve the poor interparticle electronic communication between free QD and cocatalyst, we design here a self-assembled architecture of nanoparticles, QDs and Ptnanoparticles, simply jointed together by molecular polyacrylate to greatly enhance the rate and efficiency of interfacial electron transfer (ET). The enhanced interparticle electronic communication is confirmed by femtosecond transient absorption spectroscopy and X-ray transient absorption. Taking advantage of the enhanced interparticle ET with a time scale of ~65 ps, 5.0 mL assembled CdSe/CdS QDs/cocatalysts solution produces 94 ± 1.5 mL (4183 ± 67 µmol) molecular H2 in 8 h, giving rise to an internal quantum yield of ~65% in the first 30 min and a total turnover number of >16,400,000 per Pt-nanoparticle. This study demonstrates that self-assembly is a promising way to improve the sluggish kinetics of interparticle ET process, which is the key step for advanced H2 photosynthesis.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1372067
Journal Information:
Journal of the American Chemical Society, Vol. 139, Issue 13; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 134 works
Citation information provided by
Web of Science

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Ultrafast Dynamics of Charge Transfer and Photochemical Reactions in Solar Energy Conversion journal October 2018
Energy transfer-enhanced photocatalytic reduction of protons within quantum dot light-harvesting–catalyst assemblies journal August 2018
Visible-light-driven coproduction of diesel precursors and hydrogen from lignocellulose-derived methylfurans journal June 2019
Discrete Supertetrahedral T5 Selenide Clusters and Their Se/S Solid Solutions: Ionic‐Liquid‐Assisted Precursor Route Syntheses and Photocatalytic Properties journal January 2020
Designed synthesis of anatase–TiO 2 (B) biphase nanowire/ZnO nanoparticle heterojunction for enhanced photocatalysis journal January 2018
Illuminating the nature and behavior of the active center: the key for photocatalytic H 2 production in Co@NH 2 -MIL-125(Ti) journal January 2018
Recent Advances in Sensitized Photocathodes: From Molecular Dyes to Semiconducting Quantum Dots journal January 2018
Metallic Ni 3 P/Ni Co-Catalyst To Enhance Photocatalytic Hydrogen Evolution journal November 2017
Water‐Soluble Conjugated Molecule for Solar‐Driven Hydrogen Evolution from Salt Water journal February 2019
Catalytic Hydrogen Production Using A Cobalt Catalyst Bearing a Phosphinoamine Ligand journal February 2019
Self-assembled inorganic clusters of semiconducting quantum dots for effective solar hydrogen evolution journal January 2018
Two-dimensional-related catalytic materials for solar-driven conversion of CO x into valuable chemical feedstocks journal January 2019
Quantum Dot Assembly for Light-Driven Multielectron Redox Reactions, such as Hydrogen Evolution and CO 2 Reduction journal May 2019
Tailoring Chiroptical Activity of Iron Disulfide Quantum Dot Hydrogels with Circularly Polarized Light journal June 2019
Semiconductor Quantum Dots: An Emerging Candidate for CO 2 Photoreduction journal June 2019
Surface Modification of Magnetic Iron Oxide Nanoparticles journal October 2018
Highly efficient and selective visible-light driven CO 2 -to-CO conversion by a Co-based cryptate in H 2 O/CH 3 CN solution journal January 2018
Amino group promoted photocatalytic hydrogen evolution activity observed in two copper( ii )-based layered complexes journal January 2018
Charge Accumulation and Multi‐Electron Photoredox Chemistry with a Sensitizer–Catalyst–Sensitizer Triad journal August 2018
Photocatalysis with Quantum Dots and Visible Light for Effective Organic Synthesis journal May 2018
[Bmmim] 6 [In 10 Se 16 Cl 4 ]·(MIm) 2 : an organic-ligand free discrete T3 cluster for efficient hydrogen evolution under visible light irradiation journal January 2020
Direct synthesis of sulfide capped CdS and CdS/ZnS colloidal nanocrystals for efficient hydrogen evolution under visible light irradiation journal January 2018
Proton-coupled multi-electron transfer and its relevance for artificial photosynthesis and photoredox catalysis journal January 2019
Well dispersed MoC quantum dots in ultrathin carbon films as efficient co-catalysts for photocatalytic H 2 evolution journal January 2018
Site-selective photoinduced cleavage and profiling of DNA by chiral semiconductor nanoparticles journal July 2018
Proton-coupled multi-electron transfer and its relevance for artificial photosynthesis and photoredox catalysis text January 2019
Conjugated Polymers with Oligoethylene Glycol Side Chains for Improved Photocatalytic Hydrogen Evolution journal March 2019

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