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Barth I, Akinola J, Lee J, Gutiérrez OY, Sanyal U, Singh N, Goldsmith BR. Explaining the structure sensitivity of Pt and Rh for aqueous-phase hydrogenation of phenol. J Chem Phys 2022; 156:104703. [DOI: 10.1063/5.0085298] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Phenol is an important model compound to understand the thermocatalytic (TCH) and electrocatalytic hydrogenation (ECH) of biomass to biofuels. Although Pt and Rh are among the most studied catalysts for aqueous-phase phenol hydrogenation, the reason why certain facets are active for ECH and TCH is not fully understood. Herein, we identify the active facet of Pt and Rh catalysts for aqueous-phase hydrogenation of phenol and explain the origin of the size-dependent activity trends of Pt and Rh nanoparticles. Phenol adsorption energies extracted on the active sites of Pt and Rh nanoparticles on carbon by fitting kinetic data show that the active sites adsorb phenol weakly. We predict that the turnover frequencies (TOFs) for the hydrogenation of phenol to cyclohexanone on Pt(111) and Rh(111) terraces are higher than those on (221) stepped facets based on density functional theory modeling and mean-field microkinetic simulations. The higher activities of the (111) terraces are due to lower activation energies and weaker phenol adsorption, preventing high coverages of phenol from inhibiting hydrogen adsorption. We measure that the TOF for ECH of phenol increases as the Rh nanoparticle diameter increases from 2 to 10 nm at 298 K and −0.1 V vs the reversible hydrogen electrode, qualitatively matching prior reports for Pt nanoparticles. The increase in experimental TOFs as Pt and Rh nanoparticle diameters increase is due to a larger fraction of terraces on larger particles. These findings clarify the structure sensitivity and active site of Pt and Rh for the hydrogenation of phenol and will inform the catalyst design for the hydrogenation of bio-oils.
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Affiliation(s)
- Isaiah Barth
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, USA
- Catalysis Science and Technology Institute, University of Michigan, Ann Arbor, Michigan 48109-2136, USA
| | - James Akinola
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, USA
- Catalysis Science and Technology Institute, University of Michigan, Ann Arbor, Michigan 48109-2136, USA
| | - Jonathan Lee
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, USA
- Catalysis Science and Technology Institute, University of Michigan, Ann Arbor, Michigan 48109-2136, USA
| | - Oliver Y. Gutiérrez
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Udishnu Sanyal
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Nirala Singh
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, USA
- Catalysis Science and Technology Institute, University of Michigan, Ann Arbor, Michigan 48109-2136, USA
| | - Bryan R. Goldsmith
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, USA
- Catalysis Science and Technology Institute, University of Michigan, Ann Arbor, Michigan 48109-2136, USA
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García-Cruz L, Montiel V, Solla-Gullón J. Shape-controlled metal nanoparticles for electrocatalytic applications. PHYSICAL SCIENCES REVIEWS 2019. [DOI: 10.1515/psr-2017-0124] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Abstract
The application of shape-controlled metal nanoparticles is profoundly impacting the field of electrocatalysis. On the one hand, their use has remarkably enhanced the electrocatalytic activity of many different reactions of interest. On the other hand, their usage is deeply contributing to a correct understanding of the correlations between shape/surface structure and electrochemical reactivity at the nanoscale. However, from the point of view of an electrochemist, there are a number of questions that must be fully satisfied before the evaluation of the shaped metal nanoparticles as electrocatalysts including (i) surface cleaning, (ii) surface structure characterization, and (iii) correlations between particle shape and surface structure. In this chapter, we will cover all these aspects. Initially, we will collect and discuss about the different practical protocols and procedures for obtaining clean shaped metal nanoparticles. This is an indispensable requirement for the establishment of correct correlations between shape/surface structure and electrochemical reactivity. Next, we will also report how some easy-to-do electrochemical experiments including their subsequent analyses can enormously contribute to a detailed characterization of the surface structure of the shaped metal nanoparticles. At this point, we will remark that the key point determining the resulting electrocatalytic activity is the surface structure of the nanoparticles (obviously, the atomic composition is also extremely relevant) but not the particle shape. Finally, we will summarize some of the most significant advances/results on the use of these shaped metal nanoparticles in electrocatalysis covering a wide range of electrocatalytic reactions including fuel cell-related reactions (electrooxidation of formic acid, methanol and ethanol and oxygen reduction) and also CO2 electroreduction.
Graphical Abstract:
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Alkylamine-mediated synthesis and optical properties of copper nanopolyhedrons. RESEARCH ON CHEMICAL INTERMEDIATES 2016. [DOI: 10.1007/s11164-016-2793-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Vidal-Iglesias FJ, Solla-Gullón J, Feliu JM. Recent Advances in the Use of Shape-Controlled Metal Nanoparticles in Electrocatalysis. NANOSTRUCTURE SCIENCE AND TECHNOLOGY 2016. [DOI: 10.1007/978-3-319-29930-3_2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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Vidal-Iglesias FJ, Montiel V, Solla-Gullón J. Influence of the metal loading on the electrocatalytic activity of carbon-supported (100) Pt nanoparticles. J Solid State Electrochem 2015. [DOI: 10.1007/s10008-015-2954-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Xu CD, Ye JY, Chen L, Chen DH, Li JT, Zhen CH, Sun SG. Cyclic voltammetric studies of adsorption of cetyltrimethylammonium bromide and HBr on Pt(100) towards understanding their effects in shape-controlled synthesis of nanomaterials. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.12.079] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Martínez-Rodríguez RA, Vidal-Iglesias FJ, Solla-Gullón J, Cabrera CR, Feliu JM. Synthesis and Electrocatalytic Properties of H2SO4-Induced (100) Pt Nanoparticles Prepared in Water-in-Oil Microemulsion. Chemphyschem 2014; 15:1997-2001. [DOI: 10.1002/cphc.201400056] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Indexed: 11/07/2022]
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Köntje C, Kolb DM, Jerkiewicz G. Roughening and long-range nanopatterning of Au(111) through potential cycling in aqueous acidic media. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:10272-10278. [PMID: 23855899 DOI: 10.1021/la4018757] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Electrochemical treatment of Au(111) in aqueous H2SO4 solution by repetitive application of oxide formation-reduction cycles (OFRC) generates nanopatterned surfaces with long-range order. The pattern development depends on the lower and upper potential limits (EL, EU), the number (n) of OFRCs, and the potential scan rate (s). Surface patterning of Au(111) initially (n = 1-2) generates small islands and holes that are one atomic step in height. As n increases to 5, the number of islands decreases and the holes become larger; after n = 10 OFRCs, the islands become inexistent and large, randomly distributed holes are observed. Increase of OFRCs to n = 20 generates surface structures that reside within three atomic layers and resemble phase separation through a spinodal decomposition mechanism. As the number of OFRCs rises to n = 50, a network of interconnected islands and holes emerges; the islands and holes are two-three atomic steps in height, and are located within topmost five monolayers. Further increase of the number of OFRCs to n = 100 creates a network of interconnected trigonal pyramids that are pointed in the same direction. The size of the pyramids depends on the electrolyte composition and the number of OFRCs. In the case of n = 100, the pyramids are 12-25 nm in base length and 0.4-1.6 nm in height in 0.1 M aqueous H2SO4, and 20-50 nm in base length and 0.8-1.6 nm in height in 0.1 M aqueous HNO3. The number of OFRCs and scan rate play an important role in patterning of Au(111), and complete nanopattern development requires a large number of OFRCs and low scan rates.
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Affiliation(s)
- Carsten Köntje
- Institute of Electrochemistry, University of Ulm, Albert-Einstein-Allee 47, D-89069 Ulm, Germany
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New Preparation of PdNi/C and PdAg/C Nanocatalysts for Glycerol Electrooxidation in Alkaline Medium. Electrocatalysis (N Y) 2013. [DOI: 10.1007/s12678-013-0138-1] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Urchaga P, Baranton S, Coutanceau C, Jerkiewicz G. Evidence of an Eley-Rideal mechanism in the stripping of a saturation layer of chemisorbed CO on platinum nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:13094-13104. [PMID: 22900584 DOI: 10.1021/la302388p] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The oxidative stripping of a saturation layer of CO(chem) was studied on platinum nanoparticles of high shape selectivity and narrow size distribution. Nanospheres, nanocubes, and nano-octahedrons were synthesized using the water-in-oil microemulsion or polyacrylate methods. The three shapes allowed examination of the CO(chem) stripping in relation to the geometry of the nanoparticles and presence of specific nanoscopic surface domains. Electrochemical quartz crystal nanobalance (EQCN) measurements provided evidence for the existence of more than one mechanism in the CO(chem) stripping. This was corroborated by chronoamperometry transient for a CO(chem) saturation layer at stripping potentials of E(strip) = 0.40, 0.50, 0.60, and 0.70 V. The first mechanism is operational in the case of CO(chem) stripping at lower E(strip) values; it proceeds without adsorption of anions or H(2)O molecules and corresponds to desorption of a fraction of CO(chem) in the form of a prepeak in voltammograms or in the form of an exponential decay in chrono-amperometry (CA) transients. The second mechanism is operational in the desorption of the remaining CO(chem) at higher E(strip) values and gives rise to at least two voltammetric peaks or two CA peaks. Analysis of the experimental data and modeling of the CA transients lead to the conclusion that the stripping of a saturation layer of CO(chem) first follows an Eley-Rideal mechanism in the early stage of the process and then a Langmuir-Hinshelwood mechanism.
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Affiliation(s)
- Patrick Urchaga
- Université de Poitiers, IC2MP, UMR CNRS 7285, Poitiers, France
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Coutanceau C, Lamy C, Urchaga P, Baranton S. Platinum Activity for CO Electrooxidation: from Single Crystal Surfaces to Nanosurfaces and Real Fuel Cell Nanoparticles. Electrocatalysis (N Y) 2012. [DOI: 10.1007/s12678-012-0089-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Urchaga P, Baranton S, Coutanceau C, Jerkiewicz G. Electro-oxidation of CO(chem) on Pt nanosurfaces: solution of the peak multiplicity puzzle. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:3658-3663. [PMID: 22014064 DOI: 10.1021/la202913b] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
An understanding of the oxidation of chemisorbed CO (CO(chem)) on Pt nanoparticle surfaces is of major importance to fuel cell technology. Here, we report on the relation between Pt nanoparticle surface structure and CO(chem) oxidative stripping behavior. Oxidative stripping voltammograms are obtained for CO(chem) preadsorbed on cubic, octahedral, and cuboctahedral Pt nanoparticles that possess preferentially oriented and atomically flat domains. They are compared to those obtained for etched and thermally treated Pt(poly) electrodes that possess atomically flat, ordered surface domains separated by grain boundaries as well as those obtained for spherical Pt nanoparticles. A detailed analysis of the results reveals for the first time the presence of up to four voltammetric features in CO(chem) oxidative stripping transients, a prepeak and three peaks, that are assigned to the presence of surface domains that are either preferentially oriented or disordered. The interpretation reported in this article allows one to explain all features within the voltammograms for CO(chem) oxidative stripping unambiguously.
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Affiliation(s)
- Patrick Urchaga
- Laboratoire de Catalyse en Chimie Organique, Equipe Electrocatalyse, Université de Poitiers, 40 Avenue du Recteur Pineau, 86022 Poitiers Cedex, France
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Colloidal Syntheses of Shape- and Size-Controlled Pt Nanoparticles for Electrocatalysis. Electrocatalysis (N Y) 2012. [DOI: 10.1007/s12678-012-0079-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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