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Wang TJ, Sun LB, Ai X, Chen P, Chen Y, Wang X. Boosting Formate Electrooxidation by Heterostructured PtPd Alloy and Oxides Nanowires. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2403664. [PMID: 38625813 DOI: 10.1002/adma.202403664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 04/09/2024] [Indexed: 04/18/2024]
Abstract
Direct formate fuel cells (DFFCs) receive increasing attention as promising technologies for the future energy mix and environmental sustainability, as formate can be made from carbon dioxide utilization and is carbon neutral. Herein, heterostructured platinum-palladium alloy and oxides nanowires (PtPd-ox NWs) with abundant defect sites are synthesized through a facile self-template method and demonstrated high activity toward formate electrooxidation reaction (FOR). The electronic tuning arising from the heterojunction between alloy and oxides influence the work function of PtPd-ox NWs. The sample with optimal work function reveals the favorable adsorption behavior for intermediates and strong interaction in the d-p orbital hybridization between Pt site and oxygen in formate, favoring the FOR direct pathway with a low energy barrier. Besides the thermodynamic regulation, the heterostructure can also provide sufficient hydroxyl species to facilitate the formation of carbon dioxide due to the ability of combining absorbed hydrogen and carbon monoxide at adjacent active sites, which contributes to the improvement of FOR kinetics on PtPd-ox NWs. Thus, heterostructured PtPd-ox NWs achieve dual regulation of FOR thermodynamics and kinetics, exhibiting remarkable performance and demonstrating potential in practical systems.
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Affiliation(s)
- Tian-Jiao Wang
- Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
- School of Chemical, Chemistry Engineering and Biotechnology, Nanyang Technological University, Singapore, 639798, Singapore
- Cambridge Centre for Advanced Research and Education in Singapore Ltd (Cambridge CARES), CREATE Tower, Singapore, 138602, Singapore
| | - Li-Bo Sun
- Cambridge Centre for Advanced Research and Education in Singapore Ltd (Cambridge CARES), CREATE Tower, Singapore, 138602, Singapore
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong SAR, 999077, P. R. China
| | - Xuan Ai
- Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
| | - Pei Chen
- Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
| | - Yu Chen
- Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
| | - Xin Wang
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong SAR, 999077, P. R. China
- Hong Kong Branch of National Precious Metals Material Engineering Research Center, City University of Hong Kong, Kowloon, Hong Kong SAR, 999077, P. R. China
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Nacys A, Simkunaitė D, Balciunaite A, Zabielaite A, Upskuviene D, Levinas R, Jasulaitiene V, Kovalevskij V, Simkunaite-Stanyniene B, Tamasauskaite-Tamasiunaite L, Norkus E. Pt-Coated Ni Layer Supported on Ni Foam for Enhanced Electro-Oxidation of Formic Acid. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6427. [PMID: 37834564 PMCID: PMC10573893 DOI: 10.3390/ma16196427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/18/2023] [Accepted: 09/25/2023] [Indexed: 10/15/2023]
Abstract
A Pt-coated Ni layer supported on a Ni foam catalyst (denoted PtNi/Nifoam) was investigated for the electro-oxidation of the formic acid (FAO) in acidic media. The prepared PtNi/Nifoam catalyst was studied as a function of the formic acid (FA) concentration at bare Pt and PtNi/Nifoam catalysts. The catalytic activity of the PtNi/Nifoam catalysts, studied on the basis of the ratio of the direct and indirect current peaks (jd)/(jnd) for the FAO reaction, showed values approximately 10 times higher compared to those on bare Pt, particularly at low FA concentrations, reflecting the superiority of the former catalysts for the electro-oxidation of FA to CO2. Ni foams provide a large surface area for the FAO, while synergistic effects between Pt nanoparticles and Ni-oxy species layer on Ni foams contribute significantly to the enhanced electro-oxidation of FA via the direct pathway, making it almost equal to the indirect pathway, particularly at low FA concentrations.
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Affiliation(s)
- Antanas Nacys
- Center for Physical Sciences and Technology (FTMC), LT-10257 Vilnius, Lithuania; (D.S.); (A.B.); (A.Z.); (D.U.); (R.L.); (V.J.); (V.K.); (B.S.-S.); (L.T.-T.)
| | | | | | | | | | | | | | | | | | | | - Eugenijus Norkus
- Center for Physical Sciences and Technology (FTMC), LT-10257 Vilnius, Lithuania; (D.S.); (A.B.); (A.Z.); (D.U.); (R.L.); (V.J.); (V.K.); (B.S.-S.); (L.T.-T.)
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Pan B, Shan S, Wang J, Tang Q, Guo L, Jin T, Wang Q, Li Z, Usman M, Chen F. Nickel -supported PdM (M = Au and Ag) nanodendrites as formate oxidation (electro)catalytic anodes for direct fuel cells and hydrogen generation at room temperature. NANOSCALE 2023; 15:7032-7043. [PMID: 36974475 DOI: 10.1039/d2nr06637h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The study provides a proof of concept for the first time that unique palladium-gold (PdAu) and palladium-silver (PdAg) nanodendrites are bifunctional catalytic active sites for formate oxidation reactions (FORs) and formate dehydrogenation reactions (FDRs). The unique nanodendritic structure was developed via a simple galvanic displacement reaction for the direct growth of PdAu and PdAg nanodendrites on a nickel foam (PdAu/NiNF and PdAg/NiNF). These PdAu/NiNF and PdAg/NiNF electrodes exhibited 2.32 and 1.59 times higher specific activity than that of the commercial Pd/C electrode and promising stability toward FORs. Moreover, the PdAu/NiNF and PdAg/NiNF nanodendrites were also highly active and selective catalysts for hydrogen generation from a formate solution with turnover frequency (TOF) values of 311 h-1 and 287 h-1 respectively. Impressively, a passive air-breathing formate fuel cell with PdAu/NiNF used as an anode can yield an open-circuit voltage of 1.12 V and a peak power density of 21.7 mW cm-2, which outperforms most others reported in the literature. PdAu and PdAg nanodendritic catalysts supported on a nickel foam demonstrate an open structure and uniform catalyst distribution and offer a promising nanoalloy for air-breathing formate fuel cells and on-site chemical hydrogen production systems.
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Affiliation(s)
- Bowei Pan
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China.
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Shuang Shan
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China.
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Junpeng Wang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China.
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Quan Tang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China.
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Longfei Guo
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China.
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Tao Jin
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China.
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Qiao Wang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China.
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Zhen Li
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China.
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Muhammad Usman
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China.
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Fuyi Chen
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China.
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
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Jin Y, Zhang M, Song L, Zhang M. Research Advances in Amorphous-Crystalline Heterostructures Toward Efficient Electrochemical Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2206081. [PMID: 36526597 DOI: 10.1002/smll.202206081] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/25/2022] [Indexed: 06/17/2023]
Abstract
Interface engineering of heterostructures has proven a promising strategy to effectively modulate their physicochemical properties and further improve the electrochemical performance for various applications. In this context related research of the newly proposed amorphous-crystalline heterostructures have lately surged since they combine the superior advantages of amorphous- and crystalline-phase structures, showing unusual atomic arrangements in heterointerfaces. Nonetheless, there has been much less efforts in systematic analysis and summary of the amorphous-crystalline heterostructures to examine their complicated interfacial interactions and elusory active sites. The critical structure-activity correlation and electrocatalytic mechanism remain rather elusive. In this review, the recent advances of amorphous-crystalline heterostructures in electrochemical energy conversion and storage fields are amply discussed and presented, along with remarks on the challenges and perspectives. Initially, the fundamental characteristics of amorphous-crystalline heterostructures are introduced to provide scientific viewpoints for structural understanding. Subsequently, the superiorities and current achievements of amorphous-crystalline heterostructures as highly efficient electrocatalysts/electrodes for hydrogen evolution reaction, oxygen evolution reaction, supercapacitor, lithium-ion battery, and lithium-sulfur battery applications are elaborated. At the end of this review, future outlooks and opportunities on amorphous-crystalline heterostructures are also put forward to promote their further development and application in the field of clean energy.
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Affiliation(s)
- Yachao Jin
- Institute of Energy Supply Technology for High-end Equipment, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, Jiangsu, 210044, P. R. China
| | - Mengxian Zhang
- Institute of Energy Supply Technology for High-end Equipment, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, Jiangsu, 210044, P. R. China
| | - Li Song
- Institute of Energy Supply Technology for High-end Equipment, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, Jiangsu, 210044, P. R. China
| | - Mingdao Zhang
- Institute of Energy Supply Technology for High-end Equipment, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, Jiangsu, 210044, P. R. China
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Wang C, Herranz J, Hübner R, Schmidt TJ, Eychmüller A. Element Distributions in Bimetallic Aerogels. Acc Chem Res 2023; 56:237-247. [PMID: 36700845 DOI: 10.1021/acs.accounts.2c00491] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
ConspectusMetal aerogels assembled from nanoparticles have captured grand attention because they combine the virtues of metals and aerogels and are regarded as ideal materials to address current environmental and energy issues. Among these aerogels, those composed of two metals not only display combinations (superpositions) of the properties of their individual metal components but also feature novel properties distinctly different from those of their monometallic relatives. Therefore, quite some effort has been invested in refining the synthetic methods, compositions, and structures of such bimetallic aerogels as to boost their performance for the envisaged application(s). One such use would be in the field of electrocatalysis, whereby it is also of utmost interest to unravel the element distributions of the (multi)metallic catalysts to achieve a ratio of their bottom-to-up design. Regarding the element distributions in bimetallic aerogels, advanced characterization techniques have identified alloys, core-shells, and structures in which the two metal particles are segregated (i.e., adjacent but without alloy or core-shell structure formation). While an almost infinite number of metal combinations to form bimetallic aerogels can be envisaged, the knowledge of their formation mechanisms and the corresponding element distributions is still in its infancy. The evolution of the observed musters is all but well understood, not to mention the positional changes of the elements observed in operando or in beginning- vs end-of-life comparisons (e.g., in fuel cell applications).With this motivation, in this Account we summarize the endeavors made in element distribution monitoring in bimetallic aerogels in terms of synthetic methods, expected structures, and their evolution during electrocatalysis. After an introductory chapter, we first describe briefly the two most important characterization techniques used for this, namely, scanning transmission electron microscopy (STEM) combined with element mapping (e.g., energy-dispersive X-ray spectroscopy (EDXS)) and X-ray absorption spectroscopy (XAS). We then explain the universal methods used to prepare bimetallic aerogels with different compositions. Those are divided into one-step methods in which gels formed from mixtures of the respective metal salts are coreduced and two-step approaches in which monometallic nanoparticles are mixed and gelated. Subsequently, we summarize the current state-of-knowledge on the element distributions unraveled using diverse characterization methods. This is extended to investigations of the element distributions being altered during electrochemical cycling or other loads. So far, a theoretical understanding of these processes is sparse, not to mention predictions of element distributions. The Account concludes with a series of remarks on current challenges in the field and an outlook on the gains that the field would earn from a solid understanding of the underlying processes and a predictive theoretical backing.
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Affiliation(s)
- Cui Wang
- Physical Chemistry, Technische Universität Dresden, Zellescher Weg 19, 01069 Dresden, Germany
| | - Juan Herranz
- Electrochemistry Laboratory, Paul Scherrer Institut, 5232 Villigen, Switzerland
| | - René Hübner
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - Thomas J Schmidt
- Electrochemistry Laboratory, Paul Scherrer Institut, 5232 Villigen, Switzerland.,Laboratory of Physical Chemistry, ETH Zurich, CH-8093 Zurich, Switzerland
| | - Alexander Eychmüller
- Physical Chemistry, Technische Universität Dresden, Zellescher Weg 19, 01069 Dresden, Germany
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6
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An Enhanced Oxidation of Formate on PtNi/Ni Foam Catalyst in an Alkaline Medium. CRYSTALS 2022. [DOI: 10.3390/cryst12030362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
In this study, a platinum-coated Ni foam catalyst (denoted PtNi/Ni foam) was investigated for the oxidation of the formate reaction (FOR) in an alkaline medium. The catalyst was fabricated via a two-step procedure, which involved an electroless deposition of the Ni layer using sodium hypophosphite as a reducing agent and the subsequent electrodeposition of the platinum layer. The PtNi/Ni foam catalyst demonstrated enhanced electrocatalytic activity for the FOR in an alkaline medium compared to the Ni/Ni foam catalyst and pure Pt electrode. Moreover, the PtNi/Ni foam catalyst promoted the FOR at more negative potentials than the Pt electrode. This contributed to a significant negative shift in the onset potential, indicating the high activity of the catalyst. Notably, in alkaline media with the PtNi/Ni foam catalyst, the FOR proceeds via a direct pathway mechanism without significant accumulation of poisonous carbonaceous species on the PtNi/Ni foam catalyst.
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Abrari S, Daneshvari-Esfahlan V, Hosseini MG, Mahmoodi R, Hacker V. Multi-walled carbon nanotube-supported Ni@Pd core–shell electrocatalyst for direct formate fuel cells. J APPL ELECTROCHEM 2022. [DOI: 10.1007/s10800-022-01668-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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Xu R, Wang Z, Liu S, Li H. Bimetallic AuRu aerogel with enzyme-like activity for colorimetric detection of Fe2+ and glucose. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.12.062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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9
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Li M, Xia Z, Luo M, He L, Tao L, Yang W, Yu Y, Guo S. Structural Regulation of Pd‐Based Nanoalloys for Advanced Electrocatalysis. SMALL SCIENCE 2021. [DOI: 10.1002/smsc.202100061] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Menggang Li
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin Heilongjiang 150001 China
- School of Materials Science and Engineering Peking University Beijing 100871 China
| | - Zhonghong Xia
- School of Materials Science and Engineering Peking University Beijing 100871 China
| | - Mingchuan Luo
- School of Materials Science and Engineering Peking University Beijing 100871 China
| | - Lin He
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin Heilongjiang 150001 China
| | - Lu Tao
- School of Materials Science and Engineering Peking University Beijing 100871 China
| | - Weiwei Yang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin Heilongjiang 150001 China
| | - Yongsheng Yu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin Heilongjiang 150001 China
| | - Shaojun Guo
- School of Materials Science and Engineering Peking University Beijing 100871 China
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Folkman SJ, González-Cobos J, Giancola S, Sánchez-Molina I, Galán-Mascarós JR. Benchmarking Catalysts for Formic Acid/Formate Electrooxidation. Molecules 2021; 26:4756. [PMID: 34443343 PMCID: PMC8398888 DOI: 10.3390/molecules26164756] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 07/29/2021] [Accepted: 08/03/2021] [Indexed: 11/16/2022] Open
Abstract
Energy production and consumption without the use of fossil fuels are amongst the biggest challenges currently facing humankind and the scientific community. Huge efforts have been invested in creating technologies that enable closed carbon or carbon neutral fuel cycles, limiting CO2 emissions into the atmosphere. Formic acid/formate (FA) has attracted intense interest as a liquid fuel over the last half century, giving rise to a plethora of studies on catalysts for its efficient electrocatalytic oxidation for usage in fuel cells. However, new catalysts and catalytic systems are often difficult to compare because of the variability in conditions and catalyst parameters examined. In this review, we discuss the extensive literature on FA electrooxidation using platinum, palladium and non-platinum group metal-based catalysts, the conditions typically employed in formate electrooxidation and the main electrochemical parameters for the comparison of anodic electrocatalysts to be applied in a FA fuel cell. We focused on the electrocatalytic performance in terms of onset potential and peak current density obtained during cyclic voltammetry measurements and on catalyst stability. Moreover, we handpicked a list of the most relevant examples that can be used for benchmarking and referencing future developments in the field.
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Affiliation(s)
- Scott J. Folkman
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST), Av. Paisos Catalans, 16, 43007 Tarragona, Spain; (S.G.); (I.S.-M.); (J.R.G.-M.)
| | - Jesús González-Cobos
- Institut de Recherches sur la Catalyse et l’Environnement de Lyon, UMR 5256, CNRS, Université Claude Bernard Lyon 1, 2 Avenue A. Einstein, 69626 Villeurbanne, France
| | - Stefano Giancola
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST), Av. Paisos Catalans, 16, 43007 Tarragona, Spain; (S.G.); (I.S.-M.); (J.R.G.-M.)
| | - Irene Sánchez-Molina
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST), Av. Paisos Catalans, 16, 43007 Tarragona, Spain; (S.G.); (I.S.-M.); (J.R.G.-M.)
| | - José Ramón Galán-Mascarós
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST), Av. Paisos Catalans, 16, 43007 Tarragona, Spain; (S.G.); (I.S.-M.); (J.R.G.-M.)
- ICREA, Pg. Llu’ıs Companys 23, 08010 Barcelona, Spain
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Li Z, Chen F, Bian W, Kou B, Wang Q, Guo L, Jin T, Tang Q, Pan B. Surface Pourbaix diagram of AgPd nanoalloys and its application in formate oxidation reaction. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138465] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Wang H, Fang Q, Gu W, Du D, Lin Y, Zhu C. Noble Metal Aerogels. ACS APPLIED MATERIALS & INTERFACES 2020; 12:52234-52250. [PMID: 33174718 DOI: 10.1021/acsami.0c14007] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Noble metal-based nanomaterials have been a hot research topic during the past few decades. Particularly, self-assembled porous architectures have triggered tremendous interest. At the forefront of porous nanostructures, there exists a research endeavor of noble metal aerogels (NMAs), which are unique in terms of macroscopic assembly systems and three-dimensional (3D) porous network nanostructures. Combining excellent features of noble metals and the unique structural traits of porous nanostructures, NMAs are of high interest in diverse fields, such as catalysis, sensors, and self-propulsion devices. Regardless of these achievements, it is still challenging to rationally design well-tailored NMAs in terms of ligament sizes, morphologies, and compositions and profoundly investigate the underlying gelation mechanisms. Herein, an elaborate overview of the recent progress on NMAs is given. First, a simple description of typical synthetic methods and some advanced design engineering are provided, and then, the gelation mechanism models of NMAs are discussed in detail. Furthermore, promising applications particularly focusing on electrocatalysis and biosensors are highlighted. In the final section, brief conclusions and an outlook on the existing challenges and future chances of NMAs are also proposed.
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Affiliation(s)
- Hengjia Wang
- College of Chemistry, Central China Normal University, Wuhan 430079, P.R. China
| | - Qie Fang
- College of Chemistry, Central China Normal University, Wuhan 430079, P.R. China
| | - Wenling Gu
- College of Chemistry, Central China Normal University, Wuhan 430079, P.R. China
| | - Dan Du
- School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164, United States
| | - Yuehe Lin
- School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164, United States
| | - Chengzhou Zhu
- College of Chemistry, Central China Normal University, Wuhan 430079, P.R. China
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Abstract
Nanomaterials are widely used in electrocatalysts due to their quantum size effect and high utilization efficiency. There are two ways to improve the activity of nanoelectrocatalysts: increasing the number of active sites and improving the inherent activity of each catalytic site. The structure of the catalyst itself can be improved by increasing the number of exposed active sites per unit mass. The high porosity and three-dimensional network structure enable aerogels to have the characteristics of a large specific surface area, exposing many active sites and bringing structural stability through the self-supporting nature of aerogels. Thus, by adjusting the compositions of aerogels, the synergetic effect introduced by alloy elements can be utilized to further improve the single-site activity. In this review, we summarized the basic preparation strategy of aerogels and extended it to the preparation of alloys and special structure aerogels. Moreover, through the eight electrocatalysis cases, the outstanding catalytic performances and broad applicability of aerogel electrocatalysts are emphasized. Finally, we predict the future development of pure metallic aerogel electrocatalysts from the perspective of preparation to application.
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Zhang T, Zhu X, Ye DD, Chen R, Zhou Y, Liao Q. Cyclic voltammetry electrodeposition of well-dispersed Pd nanoparticles on carbon paper as a flow-through anode for microfluidic direct formate fuel cells. NANOSCALE 2020; 12:20270-20278. [PMID: 33000821 DOI: 10.1039/d0nr05134a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The preparation of low-loading and high-performance Pd-based electrodes is required for direct formate fuel cells. In this study, cyclic voltammetry electrodeposition is used to electrodeposit Pd nanoparticles on carbon paper (Pd/CP) and achieve excellent activity and promising stability toward the formate oxidation reaction (FOR). The prepared electrode shows a thin layer of hemispherical and well-dispersed Pd nanoparticles on the fibers of the carbon paper. The open structure and uniform catalyst distribution make the Pd/CP electrode show 2.56-fold higher active area and stability in the FOR as compared with those of commercial Pd/C catalysts. An air-breathing microfluidic direct formate fuel cell (μDFFC) with a Pd/CP electrode used as a flow-through anode is constructed to further assess electrode performance. The Pd/CP electrode with low Pd loading, 0.105 mg cm-2, delivers a peak power density and limiting current density of 46.6 mW cm-2 (443.8 mW mg-1Pd) and 288.4 mA cm-2, respectively. The performance of the μDFFC is superior to those of most others reported in the literature, further boosting the commercialization of this direct formate fuel cell to power next-generation portable electronics.
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Affiliation(s)
- Tong Zhang
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China. and Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Xun Zhu
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China. and Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Ding-Ding Ye
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China. and Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Rong Chen
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China. and Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Yuan Zhou
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China. and Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
| | - Qiang Liao
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China. and Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China
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15
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Gebremariam TT, Chen F, Kou B, Guo L, Pan B, Wang Q, Li Z, Bian W. PdAgRu nanoparticles on polybenzimidazole wrapped CNTs for electrocatalytic formate oxidation. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136678] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Jin Y, Chen F, Guo L, Wang J, Kou B, Jin T, Liu H. Engineering Two-Dimensional PdAgRh Nanoalloys by Surface Reconstruction for Highly Active and Stable Formate Oxidation Electrocatalysis. ACS APPLIED MATERIALS & INTERFACES 2020; 12:26694-26703. [PMID: 32418422 DOI: 10.1021/acsami.0c05929] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Promoting the formate oxidation reaction (FOR) is central to develop promising direct formate fuel cells, but current electrocatalysts are suffering from low activity and ultrapoor stability. Herein, the ternary PdAgRh nanoalloys with ultrathin two-dimensional architecture are for the first time synthesized and employed as a novel class of electrocatalysts for the FOR. Benefitting from unique nanostructure as well as oxophilic Rh surface oxides, the Pd55Ag30Rh15/C electrocatalyst demonstrates an exceptional FOR activity of 1.85 A mgPd-1, showing a 4.74-fold improvement compared to the commercial Pd/C, and retains the current density of 150 mA mgPd-1 after a long-term test, representing the greatest durability among all available FOR electrocatalysts. More strikingly, extending the upper limit potential (ULP) of cyclic voltammetry is revealed to facilitate the surface reconstruction of the Pd55Ag30Rh15/C electrocatalyst to in situ form Ag surface oxides (Ag-O), resulting in a highly active and stable Pd/Ag-O interface at the atomic scale, which considerably boost the FOR performance. In particular, the reconstructed Pd55Ag30Rh15/C electrocatalyst exhibits a mass activity of 3.26 A mgPd-1 with 74.2% of initial activity retained after 1000 cycles. This work showcases an effective strategy to tune surface reconstruction on multimetallic nanoalloys for robust FOR electrocatalysts and beyond.
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Affiliation(s)
- Yachao Jin
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Fuyi Chen
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Longfei Guo
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Jiali Wang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Bo Kou
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Tao Jin
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Huazhen Liu
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
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17
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Pan B, Chen F, Kou B, Wang J, Tang Q, Guo L, Wang Q, Li Z, Bian W, Wang J. Unexpectedly high stability and surface reconstruction of PdAuAg nanoparticles for formate oxidation electrocatalysis. NANOSCALE 2020; 12:11659-11671. [PMID: 32436927 DOI: 10.1039/d0nr01358g] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
High-performance Pd-based nanocatalysts for alkaline methanol and formate fuel cells have stimulated widespread attention. Hence, a series of ternary Pd-Au-Ag nanoalloys have been synthesized on carbon nanotubes, which demonstrate promising activity and unexpectedly high stability for the formate oxidation reaction (FOR) in alkaline medium. The ternary Pd3Au3Ag1 nanoalloy catalyst showed an initial mass activity of 4.51 A mgPd-1 and a retained mass activity of 1.32 A mgPd-1 after chronoamperometric measurement for 3600 s, which are superior to the best values for all FOR catalysts reported so far. The Pd3Au3Ag1 catalyst also showed a good specific activity of 4.32 mA cm-2 for the methanol oxidation reaction. Furthermore, surface reconstruction of the Pd3Au3Ag1 nanoalloy was observed during FOR, where the activity of Pd3Au3Ag1 catalysts increased up to 33% and the cycling durability retained 55% after cyclic voltammetry with the upper potential of 1.7 V. The FOR enhancement is attributed to the formation of mixed oxidation-state Ag sites and the increase in the Pd surface coverage, and provides a new prospect for the design of ternary nanoalloy electrocatalysts for various fuel oxidation reactions.
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Affiliation(s)
- Bowei Pan
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, China. and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Fuyi Chen
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, China. and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Bo Kou
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Junpeng Wang
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Quan Tang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, China. and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Longfei Guo
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, China. and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Qiao Wang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, China. and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Zhen Li
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Weiqi Bian
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Jiali Wang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, China. and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
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18
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Weng YC, Wu CC, Wang HJ, Wang YY. Screening and characterization of bimetallic Pt–M (M = Y, La, Ce, Pr, Nd, Gd) electrocatalysts for the oxygen reduction reaction. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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19
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Zhang N, Chen F, Jin Y, Wang J, Jin T, Kou B. Alloying effect in silver-based dilute nanoalloy catalysts for oxygen reduction reactions. J Catal 2020. [DOI: 10.1016/j.jcat.2020.02.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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20
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Li X, Zhou X, Li L, Zhao D, Gong X, Huang X. In Situ Engineering of the Core-Shell Ag@Cu Structure on Porous Nanowire Arrays for High Energy and Stable Aqueous Ag-Bi Batteries. ACS APPLIED MATERIALS & INTERFACES 2020; 12:10332-10340. [PMID: 32043862 DOI: 10.1021/acsami.9b20596] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
There is an urgent need to design practical aqueous rechargeable batteries (ARBs) with high energy density and long cycle life, using state-of-the-art cathode materials with low toxicity and environmental friendly nature. In virtue of the stable discharge potential and high energy density, silver (Ag) presents a huge perspective in the field of aqueous batteries. Herein, the paradigm of a novel core-shell Ag@Cu structure in situ Cu porous nanowire array skeleton (Ag@Cu NWA) is designed as the efficient cathode of an ARB. Benefiting from the ultrathin metal Ag shell (∼7 nm) and the high-conductivity metal Cu core, along with the robust porous nanowire framework, the as-obtained Ag@Cu NWA cathode integrates the features of maximal utilization of the active material, superior charge transfer, and exceptional electrolyte accessibility, exhibiting a considerable capacity of 1.79 mA h cm-2 (458 mA h g-1: 92.3% of theoretical capacity) and remarkable cycling stability (83.6% retention after 5000 cycles). Furthermore, a well-designed aqueous rechargeable Ag//Bi full cell is fabricated using the Ag@Cu NWA cathode, achieving high capacity (1.57 mA h cm-2 at 2 mA cm-2) with excellent rate performance (92.9% at 20 mA cm-2) and an admirable energy density of 16.96 mW h cm-3. This work puts forward a prospective strategy to construct viable new types of ARB materials based on multimetal nanocomposites, showing great potential for practical electronic devices.
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Affiliation(s)
- Xiaohui Li
- Institute of Nanoscience and Nanotechnology, College of Physical Science and Technology, Central China Normal University, Wuhan 430079, P. R. China
| | - Xing Zhou
- Institute of Nanoscience and Nanotechnology, College of Physical Science and Technology, Central China Normal University, Wuhan 430079, P. R. China
| | - Long Li
- Institute of Nanoscience and Nanotechnology, College of Physical Science and Technology, Central China Normal University, Wuhan 430079, P. R. China
| | - Danyang Zhao
- Institute of Nanoscience and Nanotechnology, College of Physical Science and Technology, Central China Normal University, Wuhan 430079, P. R. China
| | - Xinling Gong
- Institute of Nanoscience and Nanotechnology, College of Physical Science and Technology, Central China Normal University, Wuhan 430079, P. R. China
| | - Xintang Huang
- Institute of Nanoscience and Nanotechnology, College of Physical Science and Technology, Central China Normal University, Wuhan 430079, P. R. China
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21
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Guo L, Chen F, Jin T, Liu H, Zhang N, Jin Y, Wang Q, Tang Q, Pan B. Surface reconstruction of AgPd nanoalloy particles during the electrocatalytic formate oxidation reaction. NANOSCALE 2020; 12:3469-3481. [PMID: 31990278 DOI: 10.1039/c9nr09660d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Formate is a kind of carbon-neutral fuel that can be synthesized by electrochemical conversion of CO2, however, the generated aqueous formate electrolyte is still short of potential application. Here, formate solution is proposed to be utilized as anode fuels of direct formate fuel cells through the formate oxidation reaction (FOR), and graphene supported AgPd nanoalloys (AgPd/rGO) are prepared to catalyze the FOR. Specifically, the mass activity of the as-prepared Ag49Pd51/rGO catalyst is 4.21 A mg-1Pd and the retention activity of Ag49Pd51/rGO is 49.1% of initial activity after successive 500 cycles, which is 2.48 and 3.03 times higher than that of unsupported Ag51Pd49 nanoalloys. When increasing the positive scan limit from 0.0 to 0.8 V, the mass activity of the Ag49Pd51/rGO catalyst increases from 2.32 to 6.03 A mg-1Pd and Pd surface coverage increases from 51.87% to 62.42%, indicating the occurrence of surface reconstruction where Pd atoms migrate to the surface of AgPd nanoalloys, and less intensive reconstruction is observed in unsupported Ag51Pd49 nanoalloys, whose mass activity increases from 1.35 to 2.49 A mg-1Pd. The driving force and kinetic path are calculated for the surface reconstruction induced by the adsorption of H, O and C atoms, in the case of C atoms on graphene, the segregation energy of surface Pd atoms in the AgPd nanoalloy is -1.16 eV, and the activation energy for the migration of subsurface Pd atoms to the surface is 0.54 eV, which are lower than the segregation (0.03 eV) and activation (2.06 eV) energy on a clean alloy surface.
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Affiliation(s)
- Longfei Guo
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China. and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Fuyi Chen
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China. and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Tao Jin
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China. and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Huazhen Liu
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Nan Zhang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China.
| | - Yachao Jin
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China. and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Qiao Wang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China. and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Quan Tang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China. and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Bowei Pan
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
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22
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Nanostructured silver dendrites for photon-induced Cysteine dimerization. Sci Rep 2019; 9:20174. [PMID: 31882825 PMCID: PMC6934660 DOI: 10.1038/s41598-019-56517-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 12/06/2019] [Indexed: 12/31/2022] Open
Abstract
Under a controlled adsorption environment, L-cysteine molecules can be chemically adsorbed to the dendritic silver (Ag-D) surface by electrochemical methods with different functional groups. It is verified by surface-enhanced Raman spectroscopy that under alkaline conditions (pH = 13.50), the two functional groups of thiol and acid are simultaneously adsorbed on the surface of Ag-D, while NH2 is far from the surface; under acidic conditions (pH = 1.67), adsorption behavior suggests that both NH3+ and COO− are oriented toward the Ag-D surface, and that SH is far from the surface. The structure of L-cysteine adsorption under acidic conditions can be further verified by the addition of an L-cysteine molecule through light-induced coupling reaction to form cystine. Finally, in-situ two-dimensional Raman scattering spectroscopy confirmed the feasibility and uniformity of the coupling reaction.
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23
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Zhao Z, Xu H, Feng Z, Zhang Y, Cui M, Cao D, Cheng D. Design of High-Performance Co-Based Alloy Nanocatalysts for the Oxygen Reduction Reaction. Chemistry 2019; 26:4128-4135. [PMID: 31797431 DOI: 10.1002/chem.201904431] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 11/25/2019] [Indexed: 12/19/2022]
Abstract
Co-based nanoalloys show potential applications as nanocatalysts for the oxygen reduction reaction (ORR), but improving their activity is still a great challenge. In this paper, a strategy is proposed to design efficient Co-M (M=Au, Ag, Pd, Pt, Ir, and Rh) nanoalloys as ORR catalysts by using density functional theory (DFT) calculations. Through the Sabatier analysis, the overpotential as a function of ΔGOH * is identified as a quantitative descriptor for analyzing the effect of dopants and atomic structures on the activity of the Co-based nanoalloys. By adopting the suitable dopants and atomic structures, ΔGOH * accompanied by overpotential could be adjusted to the optimal range to enhance the activity of the Co-based nanoalloys. With this strategy, the core-shell structured Ag42 Co13 nanoalloy is predicted to have the highest catalytic activity for ORR among these Co-based nanoalloys. To give a deeper insight into the properties of Ag-Co nanoalloys, the structure, thermal stability, and reaction mechanism of Ag-Co nanoalloys with different compositions are also studied by using molecular simulations and DFT calculations. It is found that core-shell Ag42 Co13 exhibits the highest structural and thermal stability among these Ag-Co nanoalloys. In addition, the core-shell Ag42 Co13 shows the lowest ORR reaction energy barriers among these Ag-Co nanoalloys. It is expected that this kind of strategy could provide a viable way to design highly efficient heterogeneous catalysts in extensive applications.
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Affiliation(s)
- Zheng Zhao
- State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.,GRINM Group Corporation Limited, Beijing, 100088, P. R. China.,Grirem Advanced Materials Co., Ltd., Beijing, 100088, P. R. China.,Hebei Province Rare Earth Functional Materials Manufacturing, Innovation Center, Xiongan, 071700, P. R. China
| | - Haoxiang Xu
- State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Zongyu Feng
- GRINM Group Corporation Limited, Beijing, 100088, P. R. China.,Grirem Advanced Materials Co., Ltd., Beijing, 100088, P. R. China.,Hebei Province Rare Earth Functional Materials Manufacturing, Innovation Center, Xiongan, 071700, P. R. China
| | - Yongqi Zhang
- GRINM Group Corporation Limited, Beijing, 100088, P. R. China.,Grirem Advanced Materials Co., Ltd., Beijing, 100088, P. R. China.,Hebei Province Rare Earth Functional Materials Manufacturing, Innovation Center, Xiongan, 071700, P. R. China
| | - Meisheng Cui
- GRINM Group Corporation Limited, Beijing, 100088, P. R. China.,Grirem Advanced Materials Co., Ltd., Beijing, 100088, P. R. China.,Hebei Province Rare Earth Functional Materials Manufacturing, Innovation Center, Xiongan, 071700, P. R. China
| | - Dapeng Cao
- State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Daojian Cheng
- State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
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24
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Chen C, Xu H, Shang H, Jin L, Song T, Wang C, Gao F, Zhang Y, Du Y. Ultrafine PtCuRh nanowire catalysts with alleviated poisoning effect for efficient ethanol oxidation. NANOSCALE 2019; 11:20090-20095. [PMID: 31612887 DOI: 10.1039/c9nr05954g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
As a green power source, direct ethanol fuel cells (DEFCs) have broad application prospects. However, most catalysts of DEFCs still exhibit defects, such as the difficulty of C-C bond cleavage, serious CO poisoning and limited catalytic activity. Here, we report ultrafine PtCuRh nanowires (NWs) with outstanding anti-CO-poisoning properties and enhanced activity. The average diameter of the ultrafine PtCuRh NWs is about 1.49 nm, effectively improving the atomic utilization efficiency (UE) of platinum. Owing to the combination of an ultrafine nanostructure, good electronic interaction and the high UE of Pt atoms, the optimized ultrafine PtCuRh NWs/C display superior electrocatalytic activity and stability compared with commercial Pt/C for the ethanol oxidation reaction (EOR). More importantly, further electrochemical results demonstrate that the incorporation of Rh is beneficial for enhancing the antipoisoning capability for some CO-like intermediates. Meanwhile, the synthetic method in this report is robust and universal, and can also be applied to the synthesis of ultrafine trimetallic PtCuPd and PtCuIr nanowires.
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Affiliation(s)
- Chunyan Chen
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Hui Xu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Hongyuan Shang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Liujun Jin
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Tongxin Song
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Cheng Wang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Fei Gao
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Yangping Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Yukou Du
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
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25
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Zhang N, Chen F, Guo L. Catalytic activity of palladium-doped silver dilute nanoalloys for formate oxidation from a theoretical perspective. Phys Chem Chem Phys 2019; 21:22598-22610. [PMID: 31589222 DOI: 10.1039/c9cp04530a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The large-scale practical application of formate oxidation reaction (FOR) catalysts is hindered by their low activity and high cost. Herein, for the first time, a series of Pd-doped Ag dilute nanoalloys is demonstrated to have high catalytic activity in FOR with reduced consumption of Pd metals through density functional theory calculations, where the effects of potential, solvent and spin on catalytic performance are discussed. The Pd1Ag(111) single-atom alloy (SAA) exhibits higher FOR catalytic activity as reflected by the low limiting potential of 0.026 eV for the direct association path and a value of 0.084 eV for the direct dissociation path, and the lowest activation energy of 0.774 eV for the rate-determining-step in the direct dissociation path compared with Pd2Ag(111) and Pd3Ag(111) dilute alloys. Pd1Ag(111) SAA exhibits an extremely narrow sharp peak in the partial density of states from -0.75 to -2.0 eV, which is due to the free-atom-like electronic structure of the single Pd atom. The isolated Pd single atom is more stable by -0.041 and -0.097 eV, respectively, than the aggregated Pd2 and Pd3 atom clusters on the Ag(111) surface, which verifies the potential application of Pd1Ag(111) SAA in experiments. Overall, this work further elucidates the theoretical profile of FOR and provides a new strategy for designing the catalytic reaction at the atomic level.
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Affiliation(s)
- Nan Zhang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, China.
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