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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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2
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Chen X, Ojha K, Koper MTM. Deconvolution of the Voltammetric Features of a Pt(100) Single-Crystal Electrode. J Phys Chem Lett 2024; 15:4958-4964. [PMID: 38687840 PMCID: PMC11089564 DOI: 10.1021/acs.jpclett.4c01056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 04/26/2024] [Accepted: 04/26/2024] [Indexed: 05/02/2024]
Abstract
The Pt(100) single-crystal electrode shows four voltammetric features in acid electrolytes, but the precise corresponding surface phenomena remain unresolved. Herein, a deconvolution of the classical "hydrogen region" from the "hydroxyl and anion region" is attempted by the comparison of voltammetric behavior of Pt(100) and GMLPt(100) electrodes. A systematic study performed on Pt(s)-[n(100) × (111)] and Pt(s)-[n(100) × (110)] electrodes reveals that the feature at EPI = 0.30 VRHE corresponds to pure hydrogen adsorption taking place at (111) step sites vicinal to (100) domains, while the peak at EPII = 0.36 VRHE actually involves hydroxyl replacing hydrogen at (100) domains. An analysis examined for H2SO4, HClO4, CH3SO3H, and HF demonstrates that the specific (H)SO4- adsorption commences at EPIII = 0.40 VRHE and effectively suppresses the formation of hydroxyl at the (100) terrace at higher potentials 0.40 < EPIV < 0.75 VRHE. Non-specifically adsorbing anions (ClO4-, CH3SO3- and F-) would only interact with the hydroxyl phase formed on the Pt(100) terrace in both potential regions.
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Affiliation(s)
- Xiaoting Chen
- School
of Materials Science and Engineering, Beijing
Institute of Technology, Beijing 100081, P.
R. China
- Leiden Institute
of Chemistry, Leiden University, P. O. Box 9502, 2300 RA, Leiden, The Netherlands
| | - Kasinath Ojha
- Leiden Institute
of Chemistry, Leiden University, P. O. Box 9502, 2300 RA, Leiden, The Netherlands
| | - Marc T. M. Koper
- Leiden Institute
of Chemistry, Leiden University, P. O. Box 9502, 2300 RA, Leiden, The Netherlands
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3
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Chen X, Ojha K, Koper MTM. Subsurface Hydride Formation Leads to Slow Surface Adsorption Processes on a Pd(111) Single-Crystal Electrode in Acidic Electrolytes. JACS AU 2023; 3:2780-2789. [PMID: 37885584 PMCID: PMC10598829 DOI: 10.1021/jacsau.3c00343] [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: 06/28/2023] [Revised: 09/05/2023] [Accepted: 09/08/2023] [Indexed: 10/28/2023]
Abstract
Palladium is one of the most important catalysts due to its widespread use in heterogeneous catalysis and electrochemistry. However, an understanding of the electrochemical processes and interfacial phenomena at Pd single-crystal electrodes/electrolytes is still scarce. In this work, the electrochemical behavior of the Pd(111) electrode was studied by the combination of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) in different acidic electrolytes, namely, sulfuric acid, perchlorate acid, methane sulfonic acid, and hydrofluoric acid. An analysis of CV profiles shows the strong adsorption of all anions at low electrode potential, partially overlapping with underpotential deposited hydrogen (UPD-H), leading to the appearance of a pair of sharp peaks in what would be considered the "hydrogen region". All anions studied (HSO4-, ClO4-, CH3SO3-, and F-) adsorb specifically and interact with (or effectively block) the surface-adsorbed hydroxyl phase formed on the Pd(111) terrace at higher potentials. Strikingly, the scan rate-dependent results show that the process of anion adsorption and desorption is a kinetically rather slow step. EIS measurements show that the exact mechanism of this slow anion ad/desorption process actually stems from (sub)surface phenomena: the direct hydrogen insertion into Pd lattice (hydrogen subsurface absorption) commences from ca. 0.40 V and leads to the formation of (subsurface) Pd hydrides (PdHx). We argue that the subsurface hydrogen phase significantly alters the work function and thereby the kinetics of the anion adsorption and desorption processes, leading to irreversible peaks in the voltammetry. This precise understanding is important in guiding further fundamental work on Pd single crystals and will be crucial to advancing the eventual design of optimized Pd electrocatalysts.
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Affiliation(s)
- Xiaoting Chen
- School
of Materials Science and Engineering, Beijing
Institute of Technology, Beijing 100081, P.R. China
- Leiden
Institute of Chemistry, Leiden University, PO Box 9502, Leiden 2300 RA, The Netherlands
| | - Kasinath Ojha
- Leiden
Institute of Chemistry, Leiden University, PO Box 9502, Leiden 2300 RA, The Netherlands
| | - Marc T. M. Koper
- Leiden
Institute of Chemistry, Leiden University, PO Box 9502, Leiden 2300 RA, The Netherlands
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4
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Ye C, Dattila F, Chen X, López N, Koper MTM. Influence of Cations on HCOOH and CO Formation during CO 2 Reduction on a Pd MLPt(111) Electrode. J Am Chem Soc 2023; 145:19601-19610. [PMID: 37651736 PMCID: PMC10510319 DOI: 10.1021/jacs.3c03786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Indexed: 09/02/2023]
Abstract
Understanding the role of cations in the electrochemical CO2 reduction (CO2RR) process is of fundamental importance for practical application. In this work, we investigate how cations influence HCOOH and CO formation on PdMLPt(111) in pH 3 electrolytes. While only (a small amount of adsorbed) CO forms on PdMLPt(111) in the absence of metal cations, the onset potential of HCOOH and CO decreases with increasing cation concentrations. The cation effect is stronger on HCOOH formation than that on CO formation on PdMLPt(111). Density functional theory simulations indicate that cations facilitate both hydride formation and CO2 activation by polarizing the electronic density at the surface and stabilizing *CO2-. Although the upshift of the metal work function caused by high coverage of adsorbates limits hydride formation, the cation-induced electric field counterbalances this effect in the case of *H species, sustaining HCOOH production at mild negative potentials. Instead, at the high *CO coverages observed at very negative potentials, surface hydrides do not form, preventing the HCOOH route both in the absence and presence of cations. Our results open the way for a consistent evaluation of cationic electrolyte effects on both activity and selectivity in CO2RR on Pd-Pt catalysts.
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Affiliation(s)
- Chunmiao Ye
- Leiden
Institute of Chemistry, Leiden University, 2300 RA Leiden, The Netherlands
| | - Federico Dattila
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), The Barcelona Institute
of Science and Technology (BIST), 43007 Tarragona, Spain
| | - Xiaoting Chen
- Leiden
Institute of Chemistry, Leiden University, 2300 RA Leiden, The Netherlands
| | - Núria López
- Institute
of Chemical Research of Catalonia (ICIQ-CERCA), The Barcelona Institute
of Science and Technology (BIST), 43007 Tarragona, Spain
| | - Marc T. M. Koper
- Leiden
Institute of Chemistry, Leiden University, 2300 RA Leiden, The Netherlands
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5
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Zhao Y, Liu X, Chen J, Chen J, Chen J, Fan L, Yang H, Xi S, Shen L, Wang L. Promote electroreduction of CO 2 via catalyst valence state manipulation by surface-capping ligand. Proc Natl Acad Sci U S A 2023; 120:e2218040120. [PMID: 37216512 PMCID: PMC10235936 DOI: 10.1073/pnas.2218040120] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Accepted: 04/10/2023] [Indexed: 05/24/2023] Open
Abstract
Electrochemical CO2 reduction provides a potential means for synthesizing value-added chemicals over the near equilibrium potential regime, i.e., formate production on Pd-based catalysts. However, the activity of Pd catalysts has been largely plagued by the potential-depended deactivation pathways (e.g., [Formula: see text]-PdH to [Formula: see text]-PdH phase transition, CO poisoning), limiting the formate production to a narrow potential window of 0 V to -0.25 V vs. reversible hydrogen electrode (RHE). Herein, we discovered that the Pd surface capped with polyvinylpyrrolidone (PVP) ligand exhibits effective resistance to the potential-depended deactivations and can catalyze formate production at a much extended potential window (beyond -0.7 V vs. RHE) with significantly improved activity (~14-times enhancement at -0.4 V vs. RHE) compared to that of the pristine Pd surface. Combined results from physical and electrochemical characterizations, kinetic analysis, and first-principle simulations suggest that the PVP capping ligand can effectively stabilize the high-valence-state Pd species (Pdδ+) resulted from the catalyst synthesis and pretreatments, and these Pdδ+ species are responsible for the inhibited phase transition from [Formula: see text]-PdH to [Formula: see text]-PdH, and the suppression of CO and H2 formation. The present study confers a desired catalyst design principle, introducing positive charges into Pd-based electrocatalyst to enable efficient and stable CO2 to formate conversion.
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Affiliation(s)
- Yilin Zhao
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore117585, Singapore
| | - Xiaoqing Liu
- Department of Mechanical Engineering, National University of Singapore, Singapore117575, Singapore
| | - Jingyi Chen
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore117585, Singapore
| | - Junmei Chen
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore117585, Singapore
| | - Jiayi Chen
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore117585, Singapore
| | - Lei Fan
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore117585, Singapore
| | - Haozhou Yang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore117585, Singapore
| | - Shibo Xi
- Institute of Sustainability for Chemicals, Energy and Environment, A*STAR, Jurong Island, Singapore627833, Singapore
| | - Lei Shen
- Department of Mechanical Engineering, National University of Singapore, Singapore117575, Singapore
| | - Lei Wang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore117585, Singapore
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6
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Formic Acid Electrooxidation on Palladium Nano-Layers Deposited onto Pt(111): Investigation of the Substrate Effect. Electrocatalysis (N Y) 2023. [DOI: 10.1007/s12678-023-00816-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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7
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Orellana W, Zuñiga C, Gatica A, Ureta-Zanartu MS, Zagal JH, Tasca F. Effect of Electrolyte Media on the Catalysis of Fe Phthalocyanine toward the Oxygen Reduction Reaction: Ab Initio Molecular Dynamics Simulations and Experimental Analyses. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Walter Orellana
- Departamento de Ciencias Físicas, Universidad Andres Bello, Sazié 2212, Santiago837-0136, Chile
| | - Cesar Zuñiga
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O’Higgins 3363, Santiago837-0136, Chile
| | - Angelica Gatica
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O’Higgins 3363, Santiago837-0136, Chile
| | - Maria-Soledad Ureta-Zanartu
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O’Higgins 3363, Santiago837-0136, Chile
| | - Jose H. Zagal
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O’Higgins 3363, Santiago837-0136, Chile
| | - Federico Tasca
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O’Higgins 3363, Santiago837-0136, Chile
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8
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Villalba MA, Koper MT. Selective electrocatalytic hydrogenation of α,β-unsaturated ketone on (111)-oriented Pd and Pt electrodes. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140264] [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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Some features of alcohols electrooxidation process on Pd, Rh and PdRh catalysts. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.139998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Fortunato GV, Bezerra LS, Cardoso ESF, Kronka MS, Santos AJ, Greco AS, Júnior JLR, Lanza MRV, Maia G. Using Palladium and Gold Palladium Nanoparticles Decorated with Molybdenum Oxide for Versatile Hydrogen Peroxide Electroproduction on Graphene Nanoribbons. ACS APPLIED MATERIALS & INTERFACES 2022; 14:6777-6793. [PMID: 35080174 DOI: 10.1021/acsami.1c22362] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Electrocatalytic production of H2O2 via a two-electron oxygen reduction reaction (ORR-2e-) is regarded as a highly promising decentralized and environmentally friendly mechanism for the production of this important chemical commodity. However, the underlying challenges related to the development of catalytic materials that contain zero or low content of noble metals and that are relatively more active, selective, and resistant for long-term use have become a huge obstacle for the electroproduction of H2O2 on commercial and industrial scales. The present study reports the synthesis and characterization of low metal-loaded (≤6.4 wt %) catalysts and their efficiency in H2O2 electroproduction. The catalysts were constructed using gold palladium molybdenum oxide (AuPdMoOx) and palladium molybdenum oxide (PdMoOx) nanoparticles supported on graphene nanoribbons. Based on the application of a rotating ring-disk electrode, we conducted a thorough comparative analysis of the electrocatalytic performance of the catalysts in the ORR under acidic and alkaline media. The proposed catalysts exhibited high catalytic activity (ca. 0.08 mA gnoble metal-1 in an acidic medium and ca. 6.6 mA gnoble metal-1 in an alkaline medium), good selectivity (over 80%), and improved long-term stability toward ORR-2e-. The results obtained showed that the enhanced ORR activity presented by the catalysts, which occurred preferentially via the two-electron pathway, was promoted by a combination of factors including geometry, Pd content, interparticle distance, and site-blocking effects, while the electrochemical stability of the catalysts may have been enhanced by the presence of MoOx.
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Affiliation(s)
- Guilherme V Fortunato
- São Carlos Institute of Chemistry, University of São Paulo, Avenida Trabalhador São-Carlense 400, São Carlos, SP 13566-590, Brazil
- Institute of Chemistry, Federal University of Mato Grosso do Sul; Av. Senador Filinto Muller, 1555; Campo Grande, MS 79074-460, Brazil
| | - Leticia S Bezerra
- Institute of Chemistry, Federal University of Mato Grosso do Sul; Av. Senador Filinto Muller, 1555; Campo Grande, MS 79074-460, Brazil
| | - Eduardo S F Cardoso
- Institute of Chemistry, Federal University of Mato Grosso do Sul; Av. Senador Filinto Muller, 1555; Campo Grande, MS 79074-460, Brazil
| | - Matheus S Kronka
- São Carlos Institute of Chemistry, University of São Paulo, Avenida Trabalhador São-Carlense 400, São Carlos, SP 13566-590, Brazil
| | - Alexsandro J Santos
- São Carlos Institute of Chemistry, University of São Paulo, Avenida Trabalhador São-Carlense 400, São Carlos, SP 13566-590, Brazil
| | - Anderson S Greco
- Faculty of Exact Sciences and Technology, Federal University of Grande Dourados, Highway Dourados-Itahum, km 12, Dourados, MS 79804-970, Brazil
| | - Jorge L R Júnior
- Institute of Chemistry, Federal University of Mato Grosso do Sul; Av. Senador Filinto Muller, 1555; Campo Grande, MS 79074-460, Brazil
| | - Marcos R V Lanza
- São Carlos Institute of Chemistry, University of São Paulo, Avenida Trabalhador São-Carlense 400, São Carlos, SP 13566-590, Brazil
| | - Gilberto Maia
- Institute of Chemistry, Federal University of Mato Grosso do Sul; Av. Senador Filinto Muller, 1555; Campo Grande, MS 79074-460, Brazil
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11
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Chen X, Granda-Marulanda LP, McCrum IT, Koper MTM. How palladium inhibits CO poisoning during electrocatalytic formic acid oxidation and carbon dioxide reduction. Nat Commun 2022; 13:38. [PMID: 35013444 PMCID: PMC8748733 DOI: 10.1038/s41467-021-27793-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 12/09/2021] [Indexed: 11/09/2022] Open
Abstract
Development of reversible and stable catalysts for the electrochemical reduction of CO2 is of great interest. Here, we elucidate the atomistic details of how a palladium electrocatalyst inhibits CO poisoning during both formic acid oxidation to carbon dioxide and carbon dioxide reduction to formic acid. We compare results obtained with a platinum single-crystal electrode modified with and without a single monolayer of palladium. We combine (high-scan-rate) cyclic voltammetry with density functional theory to explain the absence of CO poisoning on the palladium-modified electrode. We show how the high formate coverage on the palladium-modified electrode protects the surface from poisoning during formic acid oxidation, and how the adsorption of CO precursor dictates the delayed poisoning during CO2 reduction. The nature of the hydrogen adsorbed on the palladium-modified electrode is considerably different from platinum, supporting a model to explain the reversibility of this reaction. Our results help in designing catalysts for which CO poisoning needs to be avoided.
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Affiliation(s)
- Xiaoting Chen
- Leiden Institute of Chemistry, Leiden University, PO Box 9502, 2300, RA, Leiden, the Netherlands
| | - Laura P Granda-Marulanda
- Leiden Institute of Chemistry, Leiden University, PO Box 9502, 2300, RA, Leiden, the Netherlands
| | - Ian T McCrum
- Leiden Institute of Chemistry, Leiden University, PO Box 9502, 2300, RA, Leiden, the Netherlands.,Department of Chemical and Biomolecular Engineering, Clarkson University, Potsdam, NY, USA
| | - Marc T M Koper
- Leiden Institute of Chemistry, Leiden University, PO Box 9502, 2300, RA, Leiden, the Netherlands.
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12
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Ueda H, Yoshimoto S. Voltammetric investigation of anodic and cathodic processes at Au(hkl)|ionic liquid interfaces. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115691] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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13
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Structure sensitivity of electrochemical adsorption and reduction of acetol on noble metal electrodes. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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14
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Engstfeld AK, Weizenegger S, Pithan L, Beyer P, Jusys Z, Bansmann J, Behm RJ, Drnec J. Ru(0001) surface electrochemistry in the presence of specifically adsorbing anions. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138350] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Huang Y, Seo KD, Park DS, Park H, Shim YB. Hydrogen Evolution and Oxygen Reduction Reactions in Acidic Media Catalyzed by Pd 4 S Decorated N/S Doped Carbon Derived from Pd Coordination Polymer. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2007511. [PMID: 33733572 DOI: 10.1002/smll.202007511] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 01/29/2021] [Indexed: 06/12/2023]
Abstract
The template-free synthesis and the characterization of an active electrocatalyst are performed for both the hydrogen evolution and oxygen reduction reactions in acidic media. In this work, the unique chelation mode of benzene-1,4-dithiocarboxamide (BDCA) is first used to synthesize a novel palladium-BDCA coordination polymer (PdBDCA) as a precursor of palladium sulfide nanoparticles-decorated nitrogen and sulfur doped carbon (Pd4 S-SNC). The newly synthesized PdBDCA and Pd4 S-SNC nanoparticles are characterized using chemical, electrochemical, and surface analysis methods. Notably, the nanoparticles obtained at 700 °C exhibit the remarkable catalytic property for the hydrogen evolution reaction in 0.5 m H2 SO4 , showing the overpotential of 32 mV (vs reversible hydrogen electrode (RHE)) and Tafel slope of 52 mV dec-1 , which are comparable to that of Pt/C. The catalyst also shows a high oxygen reduction activity, offering the half-wave and onset potentials of 0.92 and 0.77 V (vs RHE) in 0.5 m H2 SO4 , with improved methanol tolerance and long-term stability compared with Pt/C. The present study gives a way for the design of excellent electrocatalyst for the energy conversion devices in the corrosive acidic environment.
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Affiliation(s)
- Yuanhui Huang
- Department of Chemistry, Pusan National University, Busan, 46241, Republic of Korea
| | - Kyeong-Deok Seo
- Department of Chemistry, Pusan National University, Busan, 46241, Republic of Korea
| | - Deog-Su Park
- Institute of BioPhysio Sensor Technology, Pusan National University, Busan, 46241, Republic of Korea
| | - Hyun Park
- Department of Naval Architecture & Ocean Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Yoon-Bo Shim
- Department of Chemistry, Pusan National University, Busan, 46241, Republic of Korea
- Institute of BioPhysio Sensor Technology, Pusan National University, Busan, 46241, Republic of Korea
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16
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Fang Z, Chen W. Recent advances in formic acid electro-oxidation: from the fundamental mechanism to electrocatalysts. NANOSCALE ADVANCES 2021; 3:94-105. [PMID: 36131880 PMCID: PMC9419285 DOI: 10.1039/d0na00803f] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 11/09/2020] [Indexed: 05/29/2023]
Abstract
Direct formic acid fuel cells have attracted significant attention because of their low fuel crossover, high safety, and high theoretical power density among all the proton-exchange membrane fuel cells. Much effort has been devoted to the study of formic acid oxidation, including the reaction processes and electrocatalysts. However, as a model reaction, the anodic electro-oxidation process of formic acid is still not very clear, especially regarding the confirmation of the intermediates, which is not helpful for the design and synthesis of high-performance electrocatalysts for formic acid oxidation or conducive to understanding the reaction mechanisms of other small fuel molecules. Herein, we briefly review the recent advances in investigating the mechanism of formic acid electro-oxidation and the basic design concepts of formic acid oxidation electrocatalysts. Rather than an exhaustive overview of all aspects of this topic, this mini-review mainly outlines the progress of this field in recent years.
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Affiliation(s)
- Zhongying Fang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun 130022 Jilin China
- University of Science and Technology of China Hefei 230029 Anhui China
| | - Wei Chen
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun 130022 Jilin China
- University of Science and Technology of China Hefei 230029 Anhui China
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17
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Koroidov S, Winiwarter A, Diaz-Morales O, Görlin M, Halldin Stenlid J, Wang HY, Börner M, Goodwin CM, Soldemo M, Pettersson LGM, Rossmeisl J, Hansson T, Chorkendorff I, Nilsson A. Chemisorbed oxygen or surface oxides steer the selectivity in Pd electrocatalytic propene oxidation observed by operando Pd L-edge X-ray absorption spectroscopy. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02134b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Operando Pd X-ray absorption spectroscopy elucidates how the surface oxygen species steer the selectivity in the electrochemical oxidation of propene.
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