1
|
Maillot B, Audibert JF, Miomandre F, Brasiliense V. Nanometrology based control: taming radical grafting reactions with attoliter precision. NANOSCALE 2024; 16:7594-7602. [PMID: 38506368 DOI: 10.1039/d3nr06324k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Precisely controlled micropatterning with organic moieties is a promising route for designing smart surfaces, enabling the development of microsensors and actuators with optimal usage of reactants. Such applications require fine control over the surface modification process, which in turn demands detailed knowledge about the surface modification process. As complex surface kinetics often emerge as a result of even slight modifications of the grafting entity, non-invasive, sensitive and precise closed loop control strategies are highly desirable. In this paper we demonstrate that a nanometrology approach based on quantitative phase imaging (QPI) fulfill all these requirements. We first use the technique to monitor surface photografting kinetics of aryl radicals, comprehensively analyzing the effect of substituents on surface addition reactions. We demonstrate that several aspects of the grafting process are affected in complex ways, rendering open-loop strategies impossible to implement precisely. Then, we show that the operando optical phase signal can be used as a direct feedback, guiding the grafting reaction process. Using relatively simple instrumentation, we demonstrate that general and precise control strategies can be designed and used to control the volume of the grafting material with attoliter precision, in spite of radically different surface modification kinetics spanning several orders of magnitude.
Collapse
Affiliation(s)
- Baptiste Maillot
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, PPSM, 4 avenue des sciences, 91190 Gif-sur-Yvette, France.
| | - Jean-Frédéric Audibert
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, PPSM, 4 avenue des sciences, 91190 Gif-sur-Yvette, France.
| | - Fabien Miomandre
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, PPSM, 4 avenue des sciences, 91190 Gif-sur-Yvette, France.
| | - Vitor Brasiliense
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, PPSM, 4 avenue des sciences, 91190 Gif-sur-Yvette, France.
| |
Collapse
|
2
|
Chen Z, Li X, Zhao J, Zhang S, Wang J, Zhang H, Zhang J, Dong Q, Zhang W, Hu W, Han X. Stabilizing Pt Single Atoms through Pt-Se Electron Bridges on Vacancy-enriched Nickel Selenide for Efficient Electrocatalytic Hydrogen Evolution. Angew Chem Int Ed Engl 2023; 62:e202308686. [PMID: 37503553 DOI: 10.1002/anie.202308686] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/23/2023] [Accepted: 07/24/2023] [Indexed: 07/29/2023]
Abstract
Rational design of Pt single-atom catalysts provides a promising strategy to significantly improve the electrocatalytic activity for hydrogen evolution reaction. In this work, we presented a novel and efficient strategy for utilizing the low electron-density region of substrate to effectively trap and confine high electron-density metal atoms. The Pt single-atom catalyst supported by nickel selenide with rich vacancies was prepared via a hydrothermal-impregnation stepwise approach. Through experimental testation and DFT theoretical calculation, we confirm that Pt single atoms are well distributed at cationic vacancies of nickel selenide with loading amount of 3.2 wt. %. Moreover, the atomic Pt combined with the high electronegative Se to form Pt-Se bond as a "bridge" between single atoms and substrate for fast electron translation. This novel catalyst shows an extremely low overpotential of 45 mV at 10 mA cm-2 and an excellent stability over 120 h. Furthermore, the nickel selenide supported Pt SACs exhibits long-term stability for practical application, which maintains a high current density of 390 mA cm-2 over 80 h with a retention of 99 %. This work points a promising direction for designing single atoms catalysts with high catalytic activity and stability for advanced green energy conversion technologies.
Collapse
Affiliation(s)
- Zanyu Chen
- Tianjin Key Laboratory of Composite and Functional Material, Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education) School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, P. R. China
| | - Xiaopeng Li
- Tianjin Key Laboratory of Composite and Functional Material, Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education) School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, P. R. China
- School of Materials Science and Engineering, Tianjin Key Laboratory of Building Green Functional Materials, Tianjin Chengjian University, Tianjin, 300384, P. R. China
| | - Jun Zhao
- Tianjin Key Laboratory of Composite and Functional Material, Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education) School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, P. R. China
| | - Shiyu Zhang
- Tianjin Key Laboratory of Composite and Functional Material, Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education) School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, P. R. China
| | - Jiajun Wang
- Tianjin Key Laboratory of Composite and Functional Material, Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education) School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, P. R. China
| | - Hong Zhang
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, 350207, P. R. China
| | - Jinfeng Zhang
- Tianjin Key Laboratory of Composite and Functional Material, Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education) School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, P. R. China
| | - Qiujiang Dong
- Tianjin Key Laboratory of Composite and Functional Material, Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education) School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, P. R. China
| | - Wanxing Zhang
- Tianjin Key Laboratory of Composite and Functional Material, Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education) School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, P. R. China
| | - Wenbin Hu
- Tianjin Key Laboratory of Composite and Functional Material, Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education) School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, P. R. China
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, 350207, P. R. China
| | - Xiaopeng Han
- Tianjin Key Laboratory of Composite and Functional Material, Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education) School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, P. R. China
| |
Collapse
|
3
|
Tungsten-Based Nanocatalysts: Research Progress and Future Prospects. Molecules 2022; 27:molecules27154751. [PMID: 35897927 PMCID: PMC9329835 DOI: 10.3390/molecules27154751] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 07/09/2022] [Accepted: 07/19/2022] [Indexed: 12/02/2022] Open
Abstract
The high price of noble metal resources limits its commercial application and stimulates the potential for developing new catalysts that can replace noble metal catalysts. Tungsten-based catalysts have become the most important substitutes for noble metal catalysts because of their rich resources, friendly environment, rich valence and better adsorption enthalpy. However, some challenges still hinder the development of tungsten-based catalysts, such as limited catalytic activity, instability, difficult recovery, and so on. At present, the focus of tungsten-based catalyst research is to develop a satisfactory material with high catalytic performance, excellent stability and green environmental protection, mainly including tungsten atomic catalysts, tungsten metal nanocatalysts, tungsten-based compound nanocatalysts, and so on. In this work, we first present the research status of these tungsten-based catalysts with different sizes, existing forms, and chemical compositions, and further provide a basis for future perspectives on tungsten-based catalysts.
Collapse
|