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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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Al-Qodami BA, Sayed SY, Alalawy HH, Al-Akraa IM, Allam NK, Mohammad AM. Boosted formic acid electro-oxidation on platinum nanoparticles and "mixed-valence" iron and nickel oxides. RSC Adv 2023; 13:20799-20809. [PMID: 37441028 PMCID: PMC10333810 DOI: 10.1039/d3ra03350c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 06/23/2023] [Indexed: 07/15/2023] Open
Abstract
The modification of Pt nanoparticles (nano-Pt, assembled electrochemically onto a glassy carbon (GC) substrate) with hybrid multivalent nickel (nano-NiOx) and iron (nano-FeOx) oxide nanostructures was intended to steer the mechanism of the formic acid electro-oxidation (FAO) in the desirable dehydrogenation pathway. This binary modification with inexpensive oxides succeeded in mediating the reaction mechanism of FAO by boosting reaction kinetics "electron transfer" and amending the surface geometry of the catalyst against poisoning. The sequence of deposition was optimized where the a-FeOx/NiOx/Pt/GC catalyst (where "a" denotes a post-activation step for the catalyst at -0.5 V in 0.5 mol L-1 NaOH) reserved the best hierarchy. Morphologically, while nano-Pt appeared to be spherical (ca. 100 nm in average diameter), nano-NiOx appeared as flowered nanoaggregates (ca. 56 nm in average diameter) and nano-FeOx (after activation) retained a plate-like nanostructure (ca. 38 nm in average diameter and 167 nm in average length). This a-FeOx/NiOx/Pt/GC catalyst demonstrated a remarkable catalytic efficiency (125 mA mgPt-1) for FAO that was ca. 12.5 times that of the pristine Pt/GC catalyst with up to five times improvement in the catalytic tolerance against poisoning and up to -214 mV shift in the FAO's onset potential. Evidences for equipping the a-FeOx/NiOx/Pt/GC catalyst with the least charge transfer resistance and the highest stability among the whole investigated catalysts are provided and discussed.
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Affiliation(s)
- Bilquis Ali Al-Qodami
- Chemistry Department, Faculty of Science, Cairo University Cairo 12613 Egypt
- Chemistry Department, Faculty of Education and Applied Science, Hajjah University Yemen
| | - Sayed Youssef Sayed
- Chemistry Department, Faculty of Science, Cairo University Cairo 12613 Egypt
| | - Hafsa H Alalawy
- Chemistry Department, Faculty of Science, Cairo University Cairo 12613 Egypt
| | - Islam M Al-Akraa
- Department of Chemical Engineering, Faculty of Engineering, The British University in Egypt Cairo 11837 Egypt
| | - Nageh K Allam
- Energy Materials Laboratory, School of Sciences and Engineering, The American University in Cairo New Cairo 11835 Egypt
| | - Ahmad M Mohammad
- Chemistry Department, Faculty of Science, Cairo University Cairo 12613 Egypt
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Amendment of palladium nanocubes with iron oxide nanowires for boosted formic acid electro−oxidation. ARAB J CHEM 2023. [DOI: 10.1016/j.arabjc.2022.104524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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Hossain SS, Ahmad Alwi MM, Saleem J, Al-Odail F, Basu A, Mozahar Hossain M. Recent Advances in Anode Electrocatalysts for Direct Formic Acid Fuel Cell-II-Platinum-Based Catalysts. CHEM REC 2022; 22:e202200156. [PMID: 36073789 DOI: 10.1002/tcr.202200156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 08/19/2022] [Indexed: 12/14/2022]
Abstract
Platinum-based catalysts have a long history of application in formic acid oxidation (FAO). The single metal Pt is active in FAO but expensive, scarce, and rapidly deactivates. Understanding the mechanism of FAO over Pt important for the rational design of catalysts. Pt nanomaterials rapidly deactivate because of the CO poisoning of Pt active sites via the dehydration pathway. Alloying with another transition metal improves the performance of Pt-based catalysts through bifunctional, ensemble, and steric effects. Supporting Pt catalysts on a high-surface-area support material is another technique to improve their overall catalytic activity. This review summarizes recent findings on the mechanism of FAO over Pt and Pt-based alloy catalysts. It also summarizes and analyzes binary and ternary Pt-based catalysts to understand their catalytic activity and structure relationship.
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Affiliation(s)
- Sk Safdar Hossain
- Department of Chemical Engineering, College of Engineering, King Faisal University, Al-Ahsa, 31982, Kingdom of Saudi Arabia
| | - Muhammad Mudassir Ahmad Alwi
- Department of Materials Engineering, College of Engineering, King Faisal University, Al-Ahsa, 31982, Kingdom of Saudi Arabia
| | - Junaid Saleem
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Faisal Al-Odail
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa, 31982, Kingdom of Saudi Arabia
| | - Avijit Basu
- Department of Chemical Engineering, College of Engineering, King Faisal University, Al-Ahsa, 31982, Kingdom of Saudi Arabia
| | - Mohammad Mozahar Hossain
- Department of Chemical Engineering, College of Engineering, King Fahd University of Petroleum & Minerals, Dhahran, 31612, Kingdom of Saudi Arabia
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Farah Hanis Nik Zaiman N, Shaari N. Review on flower-like structure nickel based catalyst in fuel cell application. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.11.048] [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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Al-Akraa IM, Asal YM, Mohammad AM. Surface engineering of Pt surfaces with Au and cobalt oxide nanostructures for enhanced formic acid electro-oxidation. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.103965] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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Abstract
A novel “MnOx/Pt/MWCNT-GC” nanocatalyst is recommended for the electrooxidation of formic acid (EOFA), the principal anodic reaction in the direct formic acid fuel cells (DFAFCs). The sequential (layer-by-layer) protocol was employed to prepare the catalyst through the electrodeposition of Pt (nano-Pt) and manganese oxide (nano-MnOx) nanoparticles onto the surface of a glassy carbon (GC) electrode supported with multiwalled carbon nanotubes (MWCNTs). The nano-MnOx could successfully mediate the mechanism of EOFA by accelerating the charge transfer, “electronic effect”. On the other hand, MWCNTs could enhance the catalytic performance by changing the surface geometry that inhibited the adsorption of poisoning CO, which is a typical intermediate in the reaction mechanism of EOFA that is responsible for the potential deterioration of the catalytic performance of DFAFCs. Interestingly with this modification, a significant enhancement in the catalytic activity and stability toward EOFA was achieved. Several techniques will be employed to evaluate the catalyst’s morphology, composition, crystal structure, and activity and further to understand the role of each of the nano-MnOx and MWCNTs in the catalytic enhancement.
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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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Synergistic enhancement of formic acid electro−oxidation on PtxCuy Co-electrodeposited binary catalyst. JOURNAL OF SAUDI CHEMICAL SOCIETY 2022. [DOI: 10.1016/j.jscs.2022.101437] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Al-Qodami BA, Alalawy HH, Sayed SY, Al-Akraa IM, Allam NK, Mohammad AM. Tailor-designed nanowire-structured iron and nickel oxides on platinum catalyst for formic acid electro-oxidation. RSC Adv 2022; 12:20395-20402. [PMID: 35919593 PMCID: PMC9277714 DOI: 10.1039/d2ra03386k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 06/15/2022] [Indexed: 11/22/2022] Open
Abstract
This investigation is concerned with designing efficient catalysts for direct formic acid fuel cells. A ternary catalyst containing iron (nano-FeOx) and nickel (nano-NiOx) nanowire oxides assembled sequentially onto a bare platinum (bare-Pt) substrate was recommended for the formic acid electro-oxidation reaction (FAOR). While nano-NiOx appeared as fibrillar nanowire bundles (ca. 82 nm and 4.2 μm average diameter and length, respectively), nano-FeOx was deposited as intersecting nanowires (ca. 74 nm and 400 nm average diameter and length, respectively). The electrocatalytic activity of the catalyst toward the FAOR depended on its composition and loading sequence. The FeOx/NiOx/Pt catalyst exhibited ca. 4.8 and 1.6 times increases in the catalytic activity and tolerance against CO poisoning, respectively, during the FAOR, relative to the bare-Pt catalyst. Interestingly, with a simple activation of the FeOx/NiOx/Pt catalyst at −0.5 V vs. Ag/AgCl/KCl (sat.) in 0.2 mol L−1 NaOH, a favorable Fe2+/Fe3+ transformation succeeded in mitigating the permanent CO poisoning of the Pt-based catalysts. Interestingly, this activated a-FeOx/NiOx/Pt catalyst had an activity 7 times higher than that of bare-Pt with an ca. −122 mV shift in the onset potential of the FAOR. The presence of nano-FeOx and nano-NiOx enriched the catalyst surface with extra oxygen moieties that counteracted the CO poisoning of the Pt substrate and electronically facilitated the kinetics of the FAOR, as revealed from CO stripping and impedance spectra. A FeOx/NiOx/Pt catalyst was recommended for formic acid electro-oxidation; the essential anodic reaction in direct formic acid fuel cells.![]()
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Affiliation(s)
- Bilquis Ali Al-Qodami
- Chemistry Department, Faculty of Science, Cairo University, Cairo 12613, Egypt
- Chemistry Department, Faculty of Education and Applied Science, Hajjah University, Yemen
| | - Hafsa H. Alalawy
- Chemistry Department, Faculty of Science, Cairo University, Cairo 12613, Egypt
| | - Sayed Youssef Sayed
- Chemistry Department, Faculty of Science, Cairo University, Cairo 12613, Egypt
| | - Islam M. Al-Akraa
- Department of Chemical Engineering, Faculty of Engineering, The British University in Egypt, Cairo 11837, Egypt
| | - Nageh K. Allam
- Energy Materials Laboratory, School of Sciences and Engineering, The American University in Cairo, New Cairo 11835, Egypt
| | - Ahmad M. Mohammad
- Chemistry Department, Faculty of Science, Cairo University, Cairo 12613, Egypt
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Boosted performance of NiOx/Pt nanocatalyst for the electro-oxidation of formic acid: A substrate's functionalization with multi-walled carbon nanotubes. ARAB J CHEM 2021. [DOI: 10.1016/j.arabjc.2021.103383] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Muench F, El-Nagar GA, Tichter T, Zintler A, Kunz U, Molina-Luna L, Sikolenko V, Pasquini C, Lauermann I, Roth C. Conformal Solution Deposition of Pt-Pd Titania Nanocomposite Coatings for Light-Assisted Formic Acid Electro-Oxidation. ACS APPLIED MATERIALS & INTERFACES 2019; 11:43081-43092. [PMID: 31647212 DOI: 10.1021/acsami.9b12783] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Many nanofabrication processes require sophisticated equipment, elevated temperature, vacuum or specific atmospheric conditions, templates, and exotic chemicals, which severely hamper their implementation in real-world applications. In this study, we outline a fully wet-chemical procedure for equipping a 3D carbon felt (CF) substrate with a multifunctional, titania nanospike-supported Pt-Pd nanoparticle (Pt-Pd-TiO2@CF) layer in a facile and scalable manner. The nanostructure, composition, chemical speciation, and formation of the material was meticulously investigated, evidencing the conformal coating of the substrate with a roughened layer of nanocrystalline rutile spikes by chemical bath deposition from Ti3+ solutions. The spikes are densely covered by bimetallic nanoparticles of 4.4 ± 1.1 nm in size, which were produced by autocatalytic Pt deposition onto Pd seeds introduced by Sn2+ ionic layer adsorption and reaction. The as-synthesized nanocomposite was applied to the (photo)electro-oxidation of formic acid (FA), exhibiting a superior performance compared to Pt-plated, Pd-seeded CF (Pt-Pd@CF) and commercial Pt-C, indicating the promoting electrocatalytic role of the TiO2 support. Upon UV-Vis illumination, the performance of the Pt-Pd-TiO2@CF electrode is remarkably increased (22-fold), generating a current density of 110 mA cm-2, distinctly outperforming titania-free Pt-Pd@CF (5 mA cm-2) and commercial Pt-C (6 mA cm-2) reference catalysts. In addition, the Pt-Pd-TiO2@CF showed a much better stability, characterized by a very high poisoning tolerance for in situ-generated CO intermediates, whose formation is hindered in the presence of TiO2. This overall performance boost is attributed to a dual enhancement mechanism (∼30% electrocatalytic and ∼70% photoelectrocatalytic). The photogenerated electrons from the TiO2 conduction band enrich the electron density of the Pt nanoparticles, promoting the generation of active oxygen species on their surfaces from adsorbed oxygen and water molecules, which facilitate the direct FA electro-oxidation into CO2.
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Affiliation(s)
- Falk Muench
- Department of Materials and Earth Sciences , Technische Universität Darmstadt , Alarich-Weiss-Straße 2 , 64287 Darmstadt , Germany
| | - Gumaa A El-Nagar
- Chemistry Department, Faculty of Science , Cairo University , Cairo 12613 , Egypt
- Helmholtz-Zentrum Berlin für Materialien und Energie , Berlin 12489 , Germany
| | | | - Alexander Zintler
- Department of Materials and Earth Sciences , Technische Universität Darmstadt , Alarich-Weiss-Straße 2 , 64287 Darmstadt , Germany
| | - Ulrike Kunz
- Department of Materials and Earth Sciences , Technische Universität Darmstadt , Alarich-Weiss-Straße 2 , 64287 Darmstadt , Germany
| | - Leopoldo Molina-Luna
- Department of Materials and Earth Sciences , Technische Universität Darmstadt , Alarich-Weiss-Straße 2 , 64287 Darmstadt , Germany
| | | | | | - Iver Lauermann
- Helmholtz-Zentrum Berlin für Materialien und Energie , Berlin 12489 , Germany
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Al-Sultan AA, Saleh MM, Touny AH. Direct and indirect electrocatalysis on nickel phosphate-based catalysts. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.05.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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14
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Shatla A, Hassan K, Abd-El-Latif A, Hathoot A, Baltruschat H, Abdel-Azzem M. Poly 1,5 diaminonaphthalene supported Pt, Pd, Pt/Pd and Pd/Pt nanoparticles for direct formic acid oxidation. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2018.11.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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15
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El-Nagar GA, Muench F, Roth C. Tailored dendritic platinum nanostructures as a robust and efficient direct formic acid fuel cell anode. NEW J CHEM 2019. [DOI: 10.1039/c8nj06172f] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Engineering of platinum structures with precisely controlled morphology provides an excellent opportunity to efficiently tailor their catalytic performance, greatly improving their durability and activity.
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Affiliation(s)
- Gumaa A. El-Nagar
- Chemistry Department
- Faculty of Science
- Cairo University
- Egypt
- Institute for Chemistry & Biochemistry
| | - Falk Muench
- Department of Materials and Earth Sciences
- Technische Universität Darmstadt
- Darmstadt
- Germany
| | - Christina Roth
- Institute for Chemistry & Biochemistry
- Freie Universität Berlin
- Berlin
- Germany
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16
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Pt Monolayers on Electrodeposited Nanoparticles of Different Compositions for Ammonia Electro-Oxidation. Catalysts 2018. [DOI: 10.3390/catal9010004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Pt monolayers (PtML) supported on nanoparticles with different compositions (i.e., Ru, Rh, Pd, Ir, and Au) were synthesized by the surface–limited redox replacement of underpotentially deposited Cu monolayers on nanoparticle supports. Nanoparticle supports with different compositions were directly deposited on the conducting substrate by a clean and one-step electrodeposition method with controlled deposition potential and time. The whole synthesis process of the electrode was free of surfactants, binders, capping agents and reductants, and without an additional coating process of electrocatalysts. The results show that the specific activity (SA) of PtML electrocatalysts depended strongly on the composition of the nanoparticle support. For example, the PtML supported on the Au nanoparticle exhibited 8.3 times higher SA than that supported on the Ru and Pd nanoparticles. The change in the SA of the PtML supported on different nanoparticles was related to the substrate–induced strain in the PtML resulting from the lattice mismatch between the PtML and the nanoparticle support. As the strain in the PtML changed from the tensile strain to the compressive strain, the SA of the PtML electrocatalysts decreased remarkably.
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Fabrication of CuOx-Pd Nanocatalyst Supported on a Glassy Carbon Electrode for Enhanced Formic Acid Electro-Oxidation. JOURNAL OF NANOTECHNOLOGY 2018. [DOI: 10.1155/2018/3803969] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Formic acid (FA) electro-oxidation (FAO) was investigated at a binary catalyst composed of palladium nanoparticles (PdNPs) and copper oxide nanowires (CuOxNWs) and assembled onto a glassy carbon (GC) electrode. The deposition sequence of PdNPs and CuOxNWs was properly adjusted in such a way that could improve the electrocatalytic activity and stability of the electrode toward FAO. Several techniques including cyclic voltammetry, chronoamperometry, field-emission scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction were all combined to report the catalyst’s activity and to evaluate its morphology, composition, and structure. The highest catalytic activity and stability were obtained at the CuOx/Pd/GC electrode (with PdNPs directly deposited onto the GC electrode followed by CuOxNWs with a surface coverage, Г, of ca. 49%). Such enhancement was inferred from the increase in the peak current of direct FAO (by ca. 1.5 fold) which associated a favorable negative shift in its onset potential (by ca. 30 mV). The enhanced electrocatalytic activity and stability (decreasing the loss of active material by ca. 1.5-fold) of the CuOx/Pd/GC electrode was believed originating both from facilitating the direct oxidation (decreasing the time needed to oxidize a complete monolayer of FA, increasing turnover frequency, by ca. 2.5-fold) and minimizing the poisoning impact (by ca. 71.5%) at the electrode surface during FAO.
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Pedone D, Moglianetti M, De Luca E, Bardi G, Pompa PP. Platinum nanoparticles in nanobiomedicine. Chem Soc Rev 2018; 46:4951-4975. [PMID: 28696452 DOI: 10.1039/c7cs00152e] [Citation(s) in RCA: 227] [Impact Index Per Article: 37.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Oxidative stress-dependent inflammatory diseases represent a major concern for the population's health worldwide. Biocompatible nanomaterials with enzymatic properties could play a crucial role in the treatment of such pathologies. In this respect, platinum nanoparticles (PtNPs) are promising candidates, showing remarkable catalytic activity, able to reduce the intracellular reactive oxygen species (ROS) levels and impair the downstream pathways leading to inflammation. This review reports a critical overview of the growing evidence revealing the anti-inflammatory ability of PtNPs and their potential applications in nanomedicine. It provides a detailed description of the wide variety of synthetic methods recently developed, with particular attention to the aspects influencing biocompatibility. Special attention has been paid to the studies describing the toxicological profile of PtNPs with an attempt to draw critical conclusions. The emerging picture suggests that the material per se is not causing cytotoxicity, while other physicochemical features related to the synthesis and surface functionalization may play a crucial role in determining the observed impairment of cellular functions. The enzymatic activity of PtNPs is also summarized, analyzing their action against ROS produced by pathological conditions within the cells. In particular, we extensively discuss the potential of these properties in nanomedicine to down-regulate inflammatory pathways or to be employed as diagnostic tools with colorimetric readout. A brief overview of other biomedical applications of nanoplatinum is also presented.
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Affiliation(s)
- Deborah Pedone
- Istituto Italiano di Tecnologia, Nanobiointeractions & Nanodiagnostics, Via Morego 30, 16163 Genova, Italy.
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El-Nagar GA, Hassan MA, Lauermann I, Roth C. Efficient Direct Formic Acid Fuel Cells (DFAFCs) Anode Derived from Seafood waste: Migration Mechanism. Sci Rep 2017; 7:17818. [PMID: 29259210 PMCID: PMC5736546 DOI: 10.1038/s41598-017-17978-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 12/04/2017] [Indexed: 11/22/2022] Open
Abstract
Commercial Pt/C anodes of direct formic acid fuel cells (DFAFCs) get rapidly poisoned by in-situ generated CO intermediates from formic acid non-faradaic dissociation. We succeeded in increasing the Pt nanoparticles (PtNPs) stability and activity for formic acid oxidation (DFAFCs anodic reaction) by embedding them inside a chitosan matrix obtained from seafood wastes. Atop the commercial Pt/C, formic acid (FA) is predominantly oxidized via the undesired poisoning dehydration pathway (14 times higher than the desired dehydrogenation route), wherein FA is non-faradaically dissociated to CO resulting in deactivation of the majority of the Pt active-surface sites. Surprisingly, PtNPs chemical insertion inside a chitosan matrix enhanced their efficiency for FA oxidation significantly, as demonstrated by their 27 times higher stability along with ~400 mV negative shift of the FA oxidation onset potential together with 270 times higher CO poisoning-tolerance compared to that of the commercial Pt/C. These substantial performance enhancements are believed to originate from the interaction of chitosan functionalities (e.g., NH2 and OH) with both PtNPs and FA molecules improving FA adsorption and preventing the PtNPs aggregation, besides providing the required oxygen helping with the oxidative removal of the adsorbed poisoning CO-like species at low potentials. Additionally, chitosan induced the retrieval of the Pt surface-active sites by capturing the in-situ formed poisoning CO intermediates via a so-called “migration mechanism”.
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Affiliation(s)
- Gumaa A El-Nagar
- Chemistry Department, Faculty of Science, Cairo University, 12613, Cairo, Egypt. .,Institute for Chemistry and Biochemistry, FU Berlin, Takustr. 3, D-14195, Berlin, Germany.
| | - Mohamed A Hassan
- Nanotechnology and Advanced Materials Central Lab, Agriculture Research Center, Giza, Egypt
| | - Iver Lauermann
- Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109, Berlin, Germany
| | - Christina Roth
- Institute for Chemistry and Biochemistry, FU Berlin, Takustr. 3, D-14195, Berlin, Germany
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El-Nagar GA, Mohammad AM, El-Deab MS, El-Anadouli BE. Propitious Dendritic Cu 2O-Pt Nanostructured Anodes for Direct Formic Acid Fuel Cells. ACS APPLIED MATERIALS & INTERFACES 2017; 9:19766-19772. [PMID: 28530403 DOI: 10.1021/acsami.7b01565] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This study introduces a novel competent dendritic copper oxide-platinum nanocatalyst (nano-Cu2O-Pt) immobilized onto a glassy carbon (GC) substrate for formic acid (FA) electro-oxidation (FAO); the prime reaction in the anodic compartment of direct formic acid fuel cells (DFAFCs). Interestingly, the proposed catalyst exhibited an outstanding improvement for FAO compared to the traditional platinum nanoparticles (nano-Pt) modified GC (nano-Pt/GC) catalyst. This was evaluated from steering the reaction mechanism toward the desired direct route producing carbon dioxide (CO2); consistently with mitigating the other undesired indirect pathway producing carbon monoxide (CO); the potential poison deteriorating the catalytic activity of typical Pt-based catalysts. Moreover, the developed catalyst showed a reasonable long-term catalytic stability along with a significant lowering in onset potential of direct FAO that ultimately reduces the polarization and amplifies the fuel cell's voltage. The observed catalytic enhancement was believed to originate bifunctionally; while nano-Pt represented the base for the FA adsorption, nanostructured copper oxide (nano-Cu2O) behaved as a catalytic mediator facilitating the charge transfer during FAO and providing the oxygen atmosphere inspiring the poison's (CO) oxidation at relatively lower potential. Surprisingly, moreover, nano-Cu2O induced a surface retrieval of nano-Pt active sites by capturing the poisoning CO via "a spillover mechanism" to renovate the Pt surface for the direct FAO. Finally, the catalytic tolerance of the developed catalyst toward halides' poisoning was discussed.
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Affiliation(s)
- Gumaa A El-Nagar
- Chemistry Department, Faculty of Science, Cairo University , Cairo 12613, Egypt
- Chemistry & Biochemistry-Physical & Theoretical Chemistry, Free Berlin University , 14195, Berlin, Germany
| | - Ahmad M Mohammad
- Chemistry Department, Faculty of Science, Cairo University , Cairo 12613, Egypt
| | - Mohamed S El-Deab
- Chemistry Department, Faculty of Science, Cairo University , Cairo 12613, Egypt
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El-Nagar GA, Roth C. Enhanced electrooxidation of glucose at nano-chitosan-NiOOH modified GC electrode: fuel blends and hydrocarbon impurities. Phys Chem Chem Phys 2017; 19:2537-2548. [PMID: 28059410 DOI: 10.1039/c6cp08360a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The current study addresses, for the first time, the promoting effect of some selected fuel blending components, such as methanol (MeOH), ethanol (EtOH) and acetaldehyde (ACTA), on the glucose electrooxidation at a nano-chitosan-NiOOH modified GC electrode (nano-CS-NiOOH/GC). Blending glucose with different molar ratios of MeOH, EtOH and ACTA results in a significant enhancement in the fuel utilization, NiOOH oxidation capacity and turnover number of oxidized glucose molecules compared to the pure fuels. For instance, the use of glucose fuel blends composed of 40% of glucose with 60% of either MeOH, EtOH and ACTA results in 10, 8 and 5 times higher glucose activity of the nano-CS-NiOOH/GC electrode compared to using glucose as a pure fuel, respectively. In addition, the nano-CS-NiOOH/GC electrode shows a higher tolerance towards chloride ions poisoning compared to the NiOOH/GC electrode. The existence of minute amounts of hydrocarbon impurities, such as acetonitrile stemming from degradation of fuel cell components, results in significant enhancement of the glucose electrooxidation at the nano-CS-NiOOH/GC. In contrast, the presence of any of those hydrocarbon impurities results in a significant decrease of the NiOOH/GC electrode activity indicating the essential role of chitosan. Chitosan is believed to improve the catalytic activity and durability via stabilizing the nickel oxyhydroxide phase (β-NiOOH), which may be active for the reaction.
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Affiliation(s)
- Gumaa A El-Nagar
- Chemistry Department, Faculty of Science, Cairo University, Cairo 12613, Egypt. and Institute for Chemistry and Biochemistry, FU Berlin, Takustr. 3, D-14195 Berlin, Germany.
| | - Christina Roth
- Institute for Chemistry and Biochemistry, FU Berlin, Takustr. 3, D-14195 Berlin, Germany.
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El-Nagar GA, Roth C. Impurity-Induced Electrocatalysis: Unpredicted Enhancement Effect of Ammonia Impurity Towards Formic Acid Electro-Oxidation. ChemistrySelect 2016. [DOI: 10.1002/slct.201601149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Gumaa A. El-Nagar
- Chemistry; Faculty of Science-Cairo University; Cairo Egypt
- Department of Physical and Theoretical Chemistry; Institute of Chemistry and Biochemistry; Freie Universität Berlin; Takustr. 3, D- 14195 Berlin
| | - Christina Roth
- Department of Physical and Theoretical Chemistry; Institute of Chemistry and Biochemistry; Freie Universität Berlin; Takustr. 3, D- 14195 Berlin
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El-Nagar GA, Darweesh AF, Sadiek I. A novel nano-palladium complex anode for formic acid electro-oxidation. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.08.127] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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El-Nagar GA, Mohammad AM, El-Deab MS, El-Anadouli BE. Novel fuel blends facilitating the electro-oxidation of formic acid at a nano-Pt/GC electrode. RSC Adv 2016. [DOI: 10.1039/c6ra00118a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This paper addresses the promoting effect of the electrooxidation of formic acid (FAO) at a nano-Pt/GC electrode in the presence of selected low molecular weight alcohols (R–OH) as blending components.
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Promoting Effect of Hydrocarbon Impurities on the Electro-Oxidation of Formic Acid at Pt Nanoparticles Modified GC Electrodes. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.08.119] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Leong GJ, Schulze MC, Strand MB, Maloney D, Frisco SL, Dinh HN, Pivovar B, Richards RM. Shape-directed platinum nanoparticle synthesis: nanoscale design of novel catalysts. Appl Organomet Chem 2013. [DOI: 10.1002/aoc.3048] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- G. Jeremy Leong
- Department of Chemistry and Geochemistry; Colorado School of Mines; Golden Colorado 80401 USA
- Hydrogen Technologies and Systems Center; National Renewable Energy Laboratory; Golden CO 80401 USA
| | - Maxwell C. Schulze
- Department of Chemistry and Geochemistry; Colorado School of Mines; Golden Colorado 80401 USA
| | - Matthew B Strand
- Department of Chemistry and Geochemistry; Colorado School of Mines; Golden Colorado 80401 USA
| | - David Maloney
- Department of Chemistry and Geochemistry; Colorado School of Mines; Golden Colorado 80401 USA
| | - Sarah L. Frisco
- Department of Chemistry and Geochemistry; Colorado School of Mines; Golden Colorado 80401 USA
| | - Huyen N. Dinh
- Hydrogen Technologies and Systems Center; National Renewable Energy Laboratory; Golden CO 80401 USA
| | - Bryan Pivovar
- Hydrogen Technologies and Systems Center; National Renewable Energy Laboratory; Golden CO 80401 USA
| | - Ryan M. Richards
- Department of Chemistry and Geochemistry; Colorado School of Mines; Golden Colorado 80401 USA
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