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Pu Y, Chen JL, Zhao JW, Feng L, Zhu J, Jiang X, Li WX, Liu JX. Nature of the Active Center for the Oxygen Reduction on Ag-Based Single-Atom Alloy Clusters. JACS AU 2024; 4:2886-2895. [PMID: 39211593 PMCID: PMC11350582 DOI: 10.1021/jacsau.4c00116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 07/22/2024] [Accepted: 07/22/2024] [Indexed: 09/04/2024]
Abstract
The development of alternative alloy catalysts with high activity, surpassing platinum group metals, for the oxygen reduction reaction (ORR) is urgently needed in the field of electrocatalysis. The Ag-based single-atom alloy (AgSAA) cluster has been proposed as a promising catalyst for the ORR; however, enhancing its activity under operational conditions remains challenging due to limited insights into its actual active site. Here, we demonstrate that the operando formation of the MO x (OH) y complex serves as the key active site for catalyzing the ORR over AgSAA cluster catalysts, as revealed through comprehensive neural network potential molecular dynamics simulations combined with first-principles calculations. The volcano plot of the ORR over the MO x (OH) y complex addresses the gaps inherent in traditional metallic alloy models for pure AgSAA cluster catalysts in ORR catalysis. The appropriate orbital hybridization between OH and the dopant metal in the MO x (OH) y complexes indicated that the Ag54Co1, Ag54Pd1, and Ag54Au1 clusters are optimal AgSAA catalysts for the ORR. Our work underscores the significance of theoretical modeling considering the reaction atmosphere in uncovering the true active site for the ORR, which can be extended to other reaction systems for rational catalyst design.
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Affiliation(s)
- Yixuan Pu
- Key
Laboratory of Precision and Intelligent Chemistry, School of Chemistry
and Materials Science, University of Science
and Technology of China, Hefei, Anhui 230026, China
| | - Jia-Lan Chen
- Key
Laboratory of Precision and Intelligent Chemistry, School of Chemistry
and Materials Science, University of Science
and Technology of China, Hefei, Anhui 230026, China
| | - Jian-Wen Zhao
- Key
Laboratory of Precision and Intelligent Chemistry, School of Chemistry
and Materials Science, University of Science
and Technology of China, Hefei, Anhui 230026, China
| | - Li Feng
- Key
Laboratory of Precision and Intelligent Chemistry, School of Chemistry
and Materials Science, University of Science
and Technology of China, Hefei, Anhui 230026, China
| | - Jinze Zhu
- Key
Laboratory of Precision and Intelligent Chemistry, School of Chemistry
and Materials Science, University of Science
and Technology of China, Hefei, Anhui 230026, China
| | - Xuechun Jiang
- Key
Laboratory of Precision and Intelligent Chemistry, School of Chemistry
and Materials Science, University of Science
and Technology of China, Hefei, Anhui 230026, China
| | - Wei-Xue Li
- Key
Laboratory of Precision and Intelligent Chemistry, School of Chemistry
and Materials Science, University of Science
and Technology of China, Hefei, Anhui 230026, China
- Hefei
National Laboratory, University of Science
and Technology of China, Hefei 230088, China
| | - Jin-Xun Liu
- Key
Laboratory of Precision and Intelligent Chemistry, School of Chemistry
and Materials Science, University of Science
and Technology of China, Hefei, Anhui 230026, China
- Hefei
National Laboratory, University of Science
and Technology of China, Hefei 230088, China
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Nguyet TT, Thanh Le DT, Van Duy N, Xuan CT, Ingebrandt S, Vu XT, Hoa ND. A sigh-performance hydrogen gas sensor based on Ag/Pd nanoparticle-functionalized ZnO nanoplates. RSC Adv 2023; 13:13017-13029. [PMID: 37124013 PMCID: PMC10132452 DOI: 10.1039/d3ra01436c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 04/18/2023] [Indexed: 05/02/2023] Open
Abstract
As a source of clean energy, hydrogen (H2) is a promising alternative to fossil fuels in reducing the carbon footprint. However, due to the highly explosive nature of H2, developing a high-performance sensor for real-time detection of H2 gas at low concentration is essential. Here, we demonstrated the H2 gas sensing performance of Ag/Pd nanoparticle-functionalized ZnO nanoplates. Bimetallic Ag/Pd nanoparticles with an average size of 8 nm were prepared and decorated on the surface of ZnO nanoplates to enhance the H2 gas sensing performance. Compared with pristine ZnO, the sensor based on ZnO nanoplate doped with Ag/Pd (0.025 wt%) exhibited an outstanding response upon exposure to H2 gas (R a/R g = 78 for 500 ppm) with fast response time and speedy recovery. The sensor also showed excellent selectivity for the detection of H2 over the interfering gases (i.e., CO, NH3, H2S, and VOCs). The superior gas sensing of the sensor was dominated by the morphological structure of ZnO, and the synergistic effect of strong adsorption and the optimum catalytic characteristics of the bimetallic Ag/Pd enhances the hydrogen response of the sensors. Thus, bimetallic Ag/Pd-doped ZnO is a promising sensing material for the quantitative determination of H2 concentration towards industrial applications.
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Affiliation(s)
- To Thi Nguyet
- International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST) No 1 Dai Co Viet, Hai Ba Trung Ha Noi Vietnam
| | - Dang Thi Thanh Le
- International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST) No 1 Dai Co Viet, Hai Ba Trung Ha Noi Vietnam
| | - Nguyen Van Duy
- International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST) No 1 Dai Co Viet, Hai Ba Trung Ha Noi Vietnam
| | - Chu Thi Xuan
- International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST) No 1 Dai Co Viet, Hai Ba Trung Ha Noi Vietnam
| | - Sven Ingebrandt
- Institute of Materials in Electrical Engineering 1, RWTH Aachen University Sommerfeldstr. 24 Aachen 52074 Germany
| | - Xuan Thang Vu
- Institute of Materials in Electrical Engineering 1, RWTH Aachen University Sommerfeldstr. 24 Aachen 52074 Germany
| | - Nguyen Duc Hoa
- International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST) No 1 Dai Co Viet, Hai Ba Trung Ha Noi Vietnam
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Hua M, Tian X, Li S, Lin X. PdAg/Ag(111) Surface Alloys: A Highly Efficient Catalyst of Oxygen Reduction Reaction. NANOMATERIALS 2022; 12:nano12111802. [PMID: 35683658 PMCID: PMC9182455 DOI: 10.3390/nano12111802] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 05/22/2022] [Accepted: 05/23/2022] [Indexed: 02/01/2023]
Abstract
In this article, the behavior of various Pd ensembles on the PdAg(111) surfaces was systematically investigated for oxygen reduction reaction (ORR) intermediates using density functional theory (DFT) simulation. The Pd monomer on the PdAg(111) surface (with a Pd subsurface layer) has the best predicted performance, with a higher limiting potential (0.82 V) than Pt(111) (0.80 V). It could be explained by the subsurface coordination, which was also proven by the analysis of electronic properties. In this case, it is necessary to consider the influence of the near-surface layers when modeling the single-atom alloy (SAA) catalyst processes. Another important advantage of PdAg SAA is that atomic-dispersed Pd as adsorption sites can significantly improve the resistance to CO poisoning. Furthermore, by adjusting the Pd ensembles on the catalyst surface, an exciting ORR catalyst combination with predicted activity and high tolerance to CO poisoning can be designed.
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Gulbagça F, Aygun A, Altuner EE, Bekmezci M, Gur T, Sen F, Karimi-Maleh H, Zare N, Karimi F, Vasseghian Y. Facile bio-fabrication of Pd-Ag bimetallic nanoparticles and its performance in catalytic and pharmaceutical applications: Hydrogen production and in-vitro antibacterial, anticancer activities, and model development. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.02.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Stolle HLKS, Csáki A, Dellith J, Fritzsche W. Modification of Surface Bond Au Nanospheres by Chemically and Plasmonically Induced Pd Deposition. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:245. [PMID: 33477641 PMCID: PMC7831503 DOI: 10.3390/nano11010245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/14/2021] [Accepted: 01/15/2021] [Indexed: 11/16/2022]
Abstract
In this work we investigated methods of modifying gold nanospheres bound to a silicon surface by depositing palladium onto the surfaces of single nanoparticles. Bimetallic Au-Pd nanoparticles can thus be gained for use in catalysis or sensor technology. For Pd deposition, two methods were chosen. The first method was the reduction of palladium acetate by ascorbic acid, in which the amounts of palladium acetate and ascorbic acid were varied. In the second method we utilized light-induced metal deposition by making use of the plasmonic effect. Through this method, the surface bond nanoparticles were irradiated with light of wavelengths capable of inducing plasmon resonance. The generation of hot electrons on the particle surface then reduced the palladium acetate in the vicinity of the gold nanoparticle, resulting in palladium-covered gold nanospheres. In our studies we demonstrated the effect of both enhancement methods by monitoring the particle heights over enhancement time by atomic force microscopy (AFM), and investigated the influence of ascorbic acid/Pd acetate concentration as well as the impact of the irradiated wavelengths on the enhancement effect. It could thus be proven that both methods were valid for obtaining a deposition of Pd on the surface of the gold nanoparticles. Deposition of Pd on the gold particles using the light-assisted method could be observed, indicating the impact of the plasmonic effect and hot electron for Pd acetate reduction on the gold particle surface. In the case of the reduction method with ascorbic acid, in addition to Pd deposition on the gold nanoparticle surface, larger pure Pd particles and extended clusters were also generated. The reduction with ascorbic acid however led to a considerably thicker Pd layer of up to 54 nm in comparison to up to 11 nm for the light-induced metal deposition with light resonant to the particle absorption wavelength. Likewise, it could be demonstrated that light of non-resonant wavelengths was not capable of initiating Pd deposition, since a growth of only 1.6 nm (maximum) was observed for the Pd layer.
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Affiliation(s)
- Heike Lisa Kerstin Stephanie Stolle
- Department of Nanobiophotonics, Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Straße 9, D-07745 Jena, Germany; (H.L.K.S.S.); (A.C.)
| | - Andrea Csáki
- Department of Nanobiophotonics, Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Straße 9, D-07745 Jena, Germany; (H.L.K.S.S.); (A.C.)
| | - Jan Dellith
- Competence Center for Micro- and Nanotechnologies, Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Straße 9, D-07745 Jena, Germany;
| | - Wolfgang Fritzsche
- Department of Nanobiophotonics, Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Straße 9, D-07745 Jena, Germany; (H.L.K.S.S.); (A.C.)
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Sridharan M, Maiyalagan T. Enhanced oxygen reduction activity of bimetallic Pd–Ag alloy-supported on mesoporous cerium oxide electrocatalysts in alkaline media. NEW J CHEM 2021. [DOI: 10.1039/d1nj04102a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Currently, the rational design and fabrication of Pt-free electrocatalysts towards the oxygen reduction reaction for extensive applications in fuel cells is a challenging task.
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Affiliation(s)
- M. Sridharan
- Electrochemical Energy Laboratory, Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur-603203, Tamil Nadu, India
| | - T. Maiyalagan
- Electrochemical Energy Laboratory, Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur-603203, Tamil Nadu, India
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