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Bagnall A, Eliasson N, Hansson S, Chavarot-Kerlidou M, Artero V, Tian H, Hammarström L. Ultrafast Electron Transfer from CuInS 2 Quantum Dots to a Molecular Catalyst for Hydrogen Production: Challenging Diffusion Limitations. ACS Catal 2024; 14:4186-4201. [PMID: 38510668 PMCID: PMC10949191 DOI: 10.1021/acscatal.3c06216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/06/2024] [Accepted: 02/16/2024] [Indexed: 03/22/2024]
Abstract
Systems integrating quantum dots with molecular catalysts are attracting ever more attention, primarily owing to their tunability and notable photocatalytic activity in the context of the hydrogen evolution reaction (HER) and CO2 reduction reaction (CO2RR). CuInS2 (CIS) quantum dots (QDs) are effective photoreductants, having relatively high-energy conduction bands, but their electronic structure and defect states often lead to poor performance, prompting many researchers to employ them with a core-shell structure. Molecular cobalt HER catalysts, on the other hand, often suffer from poor stability. Here, we have combined CIS QDs, surface-passivated with l-cysteine and iodide from a water-based synthesis, with two tetraazamacrocyclic cobalt complexes to realize systems which demonstrate high turnover numbers for the HER (up to >8000 per catalyst), using ascorbate as the sacrificial electron donor at pH = 4.5. Photoluminescence intensity and lifetime quenching data indicated a large degree of binding of the catalysts to the QDs, even with only ca. 1 μM each of QDs and catalysts, linked to an entirely static quenching mechanism. The data was fitted with a Poissonian distribution of catalyst molecules over the QDs, from which the concentration of QDs could be evaluated. No important difference in either quenching or photocatalysis was observed between catalysts with and without the carboxylate as a potential anchoring group. Femtosecond transient absorption spectroscopy confirmed ultrafast interfacial electron transfer from the QDs and the formation of the singly reduced catalyst (CoII state) for both complexes, with an average electron transfer rate constant of ≈ (10 ps)-1. These favorable results confirm that the core tetraazamacrocyclic cobalt complex is remarkably stable under photocatalytic conditions and that CIS QDs without inorganic shell structures for passivation can act as effective photosensitizers, while their smaller size makes them suitable for application in the sensitization of, inter alia, mesoporous electrodes.
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Affiliation(s)
- Andrew
J. Bagnall
- Department
of Chemistry-Ångström Laboratory, Uppsala University, SE-75120 Uppsala, Sweden
- Univ.
Grenoble Alpes, CNRS, CEA, IRIG, Laboratoire de Chimie et Biologie
des Métaux, 17
rue des Martyrs, F-38054 Grenoble, Cedex, France
| | - Nora Eliasson
- Department
of Chemistry-Ångström Laboratory, Uppsala University, SE-75120 Uppsala, Sweden
| | - Sofie Hansson
- Department
of Chemistry-Ångström Laboratory, Uppsala University, SE-75120 Uppsala, Sweden
| | - Murielle Chavarot-Kerlidou
- Univ.
Grenoble Alpes, CNRS, CEA, IRIG, Laboratoire de Chimie et Biologie
des Métaux, 17
rue des Martyrs, F-38054 Grenoble, Cedex, France
| | - Vincent Artero
- Univ.
Grenoble Alpes, CNRS, CEA, IRIG, Laboratoire de Chimie et Biologie
des Métaux, 17
rue des Martyrs, F-38054 Grenoble, Cedex, France
| | - Haining Tian
- Department
of Chemistry-Ångström Laboratory, Uppsala University, SE-75120 Uppsala, Sweden
| | - Leif Hammarström
- Department
of Chemistry-Ångström Laboratory, Uppsala University, SE-75120 Uppsala, Sweden
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Torimoto T, Kameyama T, Uematsu T, Kuwabata S. Controlling Optical Properties and Electronic Energy Structure of I-III-VI Semiconductor Quantum Dots for Improving Their Photofunctions. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C: PHOTOCHEMISTRY REVIEWS 2022. [DOI: 10.1016/j.jphotochemrev.2022.100569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Nie H, Wei K, Li Y, Liu Y, Zhao Y, Huang H, Shao M, Liu Y, Kang Z. Carbon dots/Bi2WO6 composite with compensatory photo-electronic effect for overall water photo-splitting at normal pressure. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.01.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Beard MC, Peng X, Hens Z, Weiss EA. Introduction to special issue: Colloidal quantum dots. J Chem Phys 2021; 153:240401. [PMID: 33380102 DOI: 10.1063/5.0039506] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Affiliation(s)
- Matthew C Beard
- Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, USA
| | - Xiaogang Peng
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Zeger Hens
- Center for Nano and Biophotonics, Ghent University, 9000 Ghent, Belgium
| | - Emily A Weiss
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA
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