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Alam M, Ping K, Danilson M, Mikli V, Käärik M, Leis J, Aruväli J, Paiste P, Rähn M, Sammelselg V, Tammeveski K, Haller S, Kramm UI, Starkov P, Kongi N. Iron Triad-Based Bimetallic M-N-C Nanomaterials as Highly Active Bifunctional Oxygen Electrocatalysts. ACS APPLIED ENERGY MATERIALS 2024; 7:4076-4087. [PMID: 38756864 PMCID: PMC11095250 DOI: 10.1021/acsaem.4c00366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 04/24/2024] [Accepted: 04/24/2024] [Indexed: 05/18/2024]
Abstract
The use of precious metal electrocatalysts in clean electrochemical energy conversion and storage applications is widespread, but the sustainability of these materials, in terms of their availability and cost, is constrained. In this research, iron triad-based bimetallic nitrogen-doped carbon (M-N-C) materials were investigated as potential bifunctional electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The synthesis of bimetallic FeCo-N-C, CoNi-N-C, and FeNi-N-C catalysts involved a precisely optimized carbonization process of their respective metal-organic precursors. Comprehensive structural analysis was undertaken to elucidate the morphology of the prepared M-N-C materials, while their electrocatalytic performance was assessed through cyclic voltammetry and rotating disk electrode measurements in a 0.1 M KOH solution. All bimetallic catalyst materials demonstrated impressive bifunctional electrocatalytic performance in both the ORR and the OER. However, the FeNi-N-C catalyst proved notably more stable, particularly in the OER conditions. Employed as a bifunctional catalyst for ORR/OER within a customized zinc-air battery, FeNi-N-C exhibited a remarkable discharge-charge voltage gap of only 0.86 V, alongside a peak power density of 60 mW cm-2. The outstanding stability of FeNi-N-C, operational for about 55 h at 2 mA cm-2, highlights its robustness for prolonged application.
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Affiliation(s)
- Mahboob Alam
- Department
of Chemistry and Biotechnology, Tallinn
University of Technology, Tallinn 12618, Estonia
- Department
of Chemistry, Catalysts and Electrocatalysts Group, Technical University of Darmstadt, Darmstadt 64287, Germany
| | - Kefeng Ping
- Department
of Chemistry and Biotechnology, Tallinn
University of Technology, Tallinn 12618, Estonia
| | - Mati Danilson
- Department
of Materials and Environmental Technology, Tallinn University of Technology, Tallinn 19086, Estonia
| | - Valdek Mikli
- Department
of Materials and Environmental Technology, Tallinn University of Technology, Tallinn 19086, Estonia
| | - Maike Käärik
- Institute
of Chemistry, University of Tartu, Tartu 50411, Estonia
| | - Jaan Leis
- Institute
of Chemistry, University of Tartu, Tartu 50411, Estonia
| | - Jaan Aruväli
- Institute
of Ecology and Earth Sciences, University
of Tartu, Tartu 50411, Estonia
| | - Päärn Paiste
- Institute
of Ecology and Earth Sciences, University
of Tartu, Tartu 50411, Estonia
| | - Mihkel Rähn
- Institute
of Physics, University of Tartu, Tartu 50411, Estonia
| | | | - Kaido Tammeveski
- Institute
of Chemistry, University of Tartu, Tartu 50411, Estonia
| | - Steffen Haller
- Department
of Chemistry, Catalysts and Electrocatalysts Group, Technical University of Darmstadt, Darmstadt 64287, Germany
| | - Ulrike I. Kramm
- Department
of Chemistry, Catalysts and Electrocatalysts Group, Technical University of Darmstadt, Darmstadt 64287, Germany
| | - Pavel Starkov
- Department
of Chemistry and Biotechnology, Tallinn
University of Technology, Tallinn 12618, Estonia
| | - Nadezda Kongi
- Institute
of Chemistry, University of Tartu, Tartu 50411, Estonia
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Li M, Shi J, Xu B, Yang X, Gao F, Zheng X, Liu Y, Cao F, Guo X, Zhang J. Size-controlled Co/CoO heterogeneous nanoparticles confined in N-doped mesoporous carbon for efficient oxygen reduction in zinc-air batteries. J Colloid Interface Sci 2024; 653:1317-1325. [PMID: 37797506 DOI: 10.1016/j.jcis.2023.09.176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 09/23/2023] [Accepted: 09/28/2023] [Indexed: 10/07/2023]
Abstract
The size of metal compound particles and interface electronic structure of heterojunctions in a matrix greatly affect oxygen reduction performance in zinc-air batteries. However, it is still a big challenge to precisely control or regulate the size of these metal compound particles and the heterojunction structure. Herein, cobalt complexes with different-sized ligands are chosen as cobalt resources and adsorbed onto a mesoporous carbon, after which they are coated with polydopamine and calcined. Under the confinement effect of mesopores and the isolation effect of ligands and dopamine, the as-obtained Co/CoO heterogeneous nanoparticles are restricted to nano-size and uniformly dispersed in N-doped carbon (NC). The sizes of Co/CoO are estimated to be 39.7, 24.9 and 15.6 nm with increased CoO contents, corresponding to the adopted cobalt precursors of Co(OAc)2, Co(acac)2 and Co(acac)3, respectively. The smallest Co/CoO/NC-S shows excellent catalytic activity for oxygen reduction reaction, with a half-wave potential of 0.82 V vs. RHE and a limiting current density of 4.59 mA cm-2. When applied to the cathode of zinc-air battery, a high peak power density of 131.9 mW cm-2 is achieved, which surpasses that of the battery powered by Pt/C. The excellent performance can be attributed to the formation of heterogeneous structures between Co and CoO, the smaller Co/CoO nanoparticles, and N-doped mesoporous carbon with effective charge/mass transport. This work provides an effective way to regulate the size and phase contents of heterogeneous particles in mesoporous carbon, which is highly valuable in electrocatalytic systems.
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Affiliation(s)
- Ming Li
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Jing Shi
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Bingrong Xu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Xinran Yang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Fei Gao
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China.
| | - Xiangjun Zheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Yuanjun Liu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Fu Cao
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - Xingmei Guo
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China; School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
| | - Junhao Zhang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China.
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Wierzbicki S, Darvishzad T, Gryboś J, Stelmachowski P, Sojka Z, Kruczała K. Switching the Locus of Oxygen Reduction and Evolution Reactions between Spinel Active Phase and Carbon Carrier upon Heteroatoms Doping. Catal Today 2023. [DOI: 10.1016/j.cattod.2023.114043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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4
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Zan L, Amin HMA, Mostafa E, Abd-El-Latif AA, Iqbal S, Baltruschat H. Electrodeposited Cobalt Nanosheets on Smooth Silver as a Bifunctional Catalyst for OER and ORR: In Situ Structural and Catalytic Characterization. ACS APPLIED MATERIALS & INTERFACES 2022; 14:55458-55470. [PMID: 36490358 DOI: 10.1021/acsami.2c12163] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Developing earth-abundant, cost-effective, and active bifunctional electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is key to boosting sustainable energy systems such as electrolyzers and lithium-air batteries. However, the performance of promising cobalt-based materials is impaired by the external effects of binders and carbon additives as well as inhomogeneous electrode fabrication. In this work, binder- and carbon-free flower-like Co-decorated Ag catalytic nanosheets were in situ-synthesized via a simple electrodeposition approach. The morphology, composition, and structure of Co/Ag before and after OER were characterized using scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). Co/Ag thin film electrodes with various Co contents exhibited a bifunctional activity toward ORR and OER due to a synergistic effect. XPS analysis suggested the formation of Co3O4 as the main active species for OER. In particular, Co (83%)/Ag surface revealed a 60 mV lower ORR overpotential than a pure Ag surface and even lower than drop-casted Co3O4 nanoparticles on Ag surface. Only 1.5% peroxide was generated, suggesting a four-electron transfer ORR. In addition, the OER onset potential on Co/Ag is 60 mV less than Co3O4. Tafel slopes of 71 and 75 mV dec-1 were obtained for ORR and OER, respectively. Importantly, the three-dimensional (3D) growth mechanism of a cobalt layer (∼1 nm) on a well-defined atomic smooth Ag surface is unraveled by in situ electrochemical scanning tunneling microscopy (EC-STM). EC-STM suggests that Co prefers to nucleate at the step edges of Ag and grows in a 3D, forming nanoparticles, where the deposition/dissolution process of the Co adlayer on Ag is reversible. This investigation may provide insights into design strategies of efficient oxygen electrocatalysts.
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Affiliation(s)
- Lingxing Zan
- Institute of Physical and Theoretical Chemistry, University of Bonn, Bonn53117, Germany
- Key Laboratory of Chemical Reaction Engineering of Shaanxi Province, College of Chemistry & Chemical Engineering, Yan'an University, Yan'an716000, China
| | - Hatem M A Amin
- Institute of Physical and Theoretical Chemistry, University of Bonn, Bonn53117, Germany
- Chemistry Department, Faculty of Science, Cairo University, Giza12613, Egypt
| | - Ehab Mostafa
- Institute of Physical and Theoretical Chemistry, University of Bonn, Bonn53117, Germany
- Chemistry Department, Faculty of Science, Mansoura University, Mansoura35516, Egypt
| | - Abdelaziz A Abd-El-Latif
- Institute of Physical and Theoretical Chemistry, University of Bonn, Bonn53117, Germany
- Physical Chemistry Department, National Research Center, Cairo12311, Egypt
| | - Shahid Iqbal
- Institute of Physical and Theoretical Chemistry, University of Bonn, Bonn53117, Germany
| | - Helmut Baltruschat
- Institute of Physical and Theoretical Chemistry, University of Bonn, Bonn53117, Germany
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Balamurugan C, Lee C, Cho K, Kim J, Park B, Pak Y, Kong J, Kwon S. Hydrothermally Grown Dual-Phase Heterogeneous Electrocatalysts for Highly Efficient Rechargeable Metal-Air Batteries with Long-Term Stability. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2203663. [PMID: 36104225 PMCID: PMC9661842 DOI: 10.1002/advs.202203663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 08/19/2022] [Indexed: 06/15/2023]
Abstract
Metal-air batteries as alternatives to the existing lithium-ion battery are becoming increasingly attractive sources of power due to their high energy-cost competitiveness and inherent safety; however, their low oxygen evolution and reduction reaction (OER/ORR) performance and poor operational stability must be overcome prior to commercialization. Herein, it is demonstrated that a novel class of hydrothermally grown dual-phase heterogeneous electrocatalysts, in which silver-manganese (AgMn) heterometal nanoparticles are anchored on top of 2D nanosheet-like nickel vanadium oxide (NiV2 O6 ), allows an enlarged surface area and efficient charge transfer/redistribution, resulting in a bifunctional OER/ORR superior to those of conventional Pt/C or RuO2 . The dual-phase NiV2 O6 /AgMn catalysts on the air cathode of a zinc-air battery lead to a stable discharge-charge voltage gap of 0.83 V at 50 mA cm-2 , with a specific capacity of 660 mAh g-1 and life cycle stabilities of more than 146 h at 10 mA cm-2 and 11 h at 50 mA cm-2 . The proposed new class of dual-phase NiV2 O6 /AgMn catalysts are successfully applied as pouch-type zinc-air batteries with long-term stability over 33.9 h at 10 mA cm-2 .
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Affiliation(s)
- Chandran Balamurugan
- Department of Energy and Materials EngineeringDongguk University‐SeoulSeoul04620Republic of Korea
- Heeger Center Advanced Materials (HCAM)Gwangju Institute of Science and Technology (GIST)Gwangju500‐712Republic of Korea
| | - Changhoon Lee
- Max Planck POSTECH Center for Complex Phase of MaterialsPohang University of Science and TechnologyPohang37673Korea
| | - Kyusang Cho
- Research Institute for Solar and Sustainable Energies (RISE)Gwangju Institute of Science and Technology (GIST)Gwangju500‐712Republic of Korea
| | - Jehan Kim
- Pohang Accelerator LaboratoryPohang University of Science and TechnologyPohang37673Republic of Korea
| | - Byoungwook Park
- Division of Advanced MaterialsKorea Research Institute of Chemical TechnologyDaejeon305‐600Republic of Korea
| | - Yusin Pak
- Sensor System Research Center (SSRC)Korea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
| | - Jaemin Kong
- Department of PhysicsGyeongsang National UniversityJinju52828Republic of Korea
| | - Sooncheol Kwon
- Department of Energy and Materials EngineeringDongguk University‐SeoulSeoul04620Republic of Korea
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Guan SJ, Zhang P, Ji SJ, Cao Y, Suen NT. Function of Internal and External Fe in a Ni-Based Precatalyst System Toward Oxygen Evolution Reaction. Inorg Chem 2022; 61:12772-12780. [PMID: 35929738 DOI: 10.1021/acs.inorgchem.2c01867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
It is well known that the "iron" impurity will influence the oxygen evolution reaction (OER) in an alkaline electrolyte, especially for the Ni-based electrocatalyst. Many research studies have investigated the function of Fe in the OER active phase, such as M(OH)2/MOOH (M = Ni and/or Fe), while, surprisingly, very few studies have examined the function of Fe in the "precatalyst" system. Accordingly, in this work, the Ni3-xFexP (x = 0, 0.5, 1) series as an Ni-based precatalyst was employed to inspect the function of internal and external Fe in the Ni-based precatalyst system. It was realized that the sample with internal Fe (i.e., Ni2.5Fe0.5P and Ni2FeP) exhibits efficient OER activity compared to that of the Fe-free one (i.e., Ni3P) owing to the large amount of active M(OH)2/MOOH formed on the surface. This indicates that the internal Fe in the present system may have the ability to facilitate the phase transformation; it was later rationalized from electronic structural calculations that the d band center of the internal Fe (middle transition metal) and Ni (late transition metal) holds the key for this observation. Adding excessive ferrous chloride tetrahydrate (FeCl2·4H2O) as the external Fe in the electrolyte will greatly improve the OER performances for Ni3P; nevertheless, that the OER activity of Ni2FeP is still much superior than that of Ni3P corroborates the fact that the Fe impurity is not the only reason for the elevated OER activity of Ni2FeP and that internal Fe is also critical to the phase transformation as well as OER performance.
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Affiliation(s)
- Si-Jia Guan
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, P. R. China
| | - Peng Zhang
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, P. R. China
| | - Shen-Jing Ji
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, P. R. China
| | - Yu Cao
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225000, P. R. China
| | - Nian-Tzu Suen
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, P. R. China
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Rajput A, Adak MK, Chakraborty B. Intrinsic Lability of NiMoO 4 to Excel the Oxygen Evolution Reaction. Inorg Chem 2022; 61:11189-11206. [PMID: 35830301 DOI: 10.1021/acs.inorgchem.2c01167] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Nickel-based bimetallic oxides such as NiMoO4 and NiWO4, when deposited on the electrode substrate, show remarkable activity toward the electrocatalytic oxygen evolution reaction (OER). The stability of such nanostructures is nevertheless speculative, and catalytically active species have been less explored. Herein, NiMoO4 nanorods and NiWO4 nanoparticles are prepared via a solvothermal route and deposited on nickel foam (NF) (NiMoO4/NF and NiWO4/NF). After ensuring the chemical and structural integrity of the catalysts on electrodes, an OER study has been performed in the alkaline medium. After a few cyclic voltammetry (CV) cycles within the potential window of 1.0-1.9 V (vs reversible hydrogen electrode (RHE)), ex situ Raman analysis of the electrodes infers the formation of NiO(OH)ED (ED: electrochemically derived) from NiMoO4 precatalyst, while NiWO4 remains stable. A controlled study, stirring of NiMoO4/NF in 1 M KOH without applied potential, confirms that NiMoO4 hydrolyzes to the isolable NiO, which under a potential bias converts into NiO(OH)ED. Perhaps the more ionic character of the Ni-O-Mo bond in the NiMoO4 compared to the Ni-O-W bond in NiWO4 causes the transformation of NiMoO4 into NiO(OH)ED. A comparison of the OER performance of electrochemically derived NiO(OH)ED, NiWO4, ex-situ-prepared Ni(OH)2, and NiO(OH) confirmed that in-situ-prepared NiO(OH)ED remained superior with a substantial potential of 238 (±6) mV at 20 mA cm-2. The notable electrochemical performance of NiO(OH)ED can be attributed to its low Tafel slope value (26 mV dec-1), high double-layer capacitance (Cdl, 1.21 mF cm-2), and a low charge-transfer resistance (Rct, 1.76 Ω). The NiO(OH)ED/NF can further be fabricated as a durable OER anode to deliver a high current density of 25-100 mA cm-2. Post-characterization of the anode proves the structural integrity of NiO(OH)ED even after 12 h of chronoamperometry at 1.595 V (vs reversible hydrogen electrode (RHE)). The NiO(OH)ED/NF can be a compatible anode to construct an overall water splitting (OWS) electrolyzer that can operate at a cell potential of 1.64 V to reach a current density of 10 mA cm-2. Similar to that on NF, NiMoO4 deposited on iron foam (IF) and carbon cloth (CC) also electrochemically converts into NiO(OH) to perform a similar OER activity. This work understandably demonstrates monoclinic NiMoO4 to be an inherently unstable electro(pre)catalyst, and its structural evolution to polycrystalline NiO(OH)ED succeeding the NiO phase is intrinsic to its superior activity.
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Affiliation(s)
- Anubha Rajput
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, 110016 New Delhi, India
| | - Mrinal Kanti Adak
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, 110016 New Delhi, India
| | - Biswarup Chakraborty
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, 110016 New Delhi, India
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8
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Malik B, Majumder S, Lorenzi R, Perelshtein I, Ejgenberg M, Paleari A, Nessim GD. Promising Electrocatalytic Water and Methanol Oxidation Reaction Activity by Nickel Doped Hematite/Surface Oxidized Carbon Nanotubes Composite Structures. Chempluschem 2022; 87:e202200036. [PMID: 35499139 DOI: 10.1002/cplu.202200036] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 04/04/2022] [Indexed: 11/11/2022]
Abstract
Tailoring the precise construction of non-precious metals and carbon-based heterogeneous catalysts for electrochemical oxygen evolution reaction (OER) and methanol oxidation reaction (MOR) is crucial for energy conversion applications. Herein, this work reports the composite of Ni doped Fe2 O3 (Ni-Fe2 O3 ) with mildly oxidized multi-walled CNT (O-CNT) as an outstanding Mott-Schottky catalyst for OER and MOR. O-CNT acts as a co-catalyst which effectively regulates the charge transfer in Ni-Fe2 O3 and thus enhances the electrocatalytic performance. Ni-Fe2 O3 /O-CNT exhibits a low onset potential of 260 mV and overpotential 310 mV @ 10 mA cm-2 for oxygen evolution. Being a Mott-Schottky catalyst, it achieves the higher flat band potential of -1.15 V with the carrier density of 0.173×1024 cm-3 . Further, in presence of 1 M CH3 OH, it delivers the MOR current density of 10 mA cm-2 at 1.46 V vs. RHE. The excellent electrocatalytic OER and MOR activity of Ni-Fe2 O3 /O-CNT could be attributed to the synergistic interaction between Ni-doped Fe2 O3 and O-CNT.
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Affiliation(s)
- Bibhudatta Malik
- Department of Chemistry and Institute of Nanotechnology, Bar-Ilan University, Ramat Gan, 52900, Israel
| | - Sumit Majumder
- Department of Chemistry and Institute of Nanotechnology, Bar-Ilan University, Ramat Gan, 52900, Israel
| | - Roberto Lorenzi
- Department of Materials Science, University of Milano-Bicocca, Via R. Cozzi 55, 20125, Milano, Italy
| | - Ilana Perelshtein
- Department of Chemistry and Institute of Nanotechnology, Bar-Ilan University, Ramat Gan, 52900, Israel
| | - Michal Ejgenberg
- Department of Chemistry and Institute of Nanotechnology, Bar-Ilan University, Ramat Gan, 52900, Israel
| | - Alberto Paleari
- Department of Materials Science, University of Milano-Bicocca, Via R. Cozzi 55, 20125, Milano, Italy
| | - Gilbert Daniel Nessim
- Department of Chemistry and Institute of Nanotechnology, Bar-Ilan University, Ramat Gan, 52900, Israel
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Wang QY, Nan G, Chen YY, Tong YC, Xu XJ, Bai QL. Theoretical Study on the Structures of Single-Atom M (M = Fe, Co, and Ni) Adsorption Outside and Inside the Defect Carbon Nanotubes. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2022. [DOI: 10.1134/s0036024422140254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Cechanaviciute IA, Bobrowski T, Jambrec D, Krysiak OA, Brix AC, Braun M, Quast T, Wilde P, Morales DM, Andronescu C, Schuhmann W. Aerosol‐based synthesis of multi‐metallic electrocatalysts for oxygen evolution and glycerol oxidation. ChemElectroChem 2022. [DOI: 10.1002/celc.202200107] [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)
| | - Tim Bobrowski
- Ruhr-Universität Bochum: Ruhr-Universitat Bochum Analytical Chemistry GERMANY
| | - Daliborka Jambrec
- Ruhr-Universität Bochum: Ruhr-Universitat Bochum Analytical Chemistry GERMANY
| | - Olga A. Krysiak
- Ruhr-Universität Bochum: Ruhr-Universitat Bochum Analytical Chemistry GERMANY
| | - Ann Cathrin Brix
- Ruhr-Universität Bochum: Ruhr-Universitat Bochum Analytical Chemistry GERMANY
| | - Michael Braun
- Universität Duisburg-Essen: Universitat Duisburg-Essen Technical Chemistry 3 GERMANY
| | - Thomas Quast
- Ruhr-Universität Bochum: Ruhr-Universitat Bochum Analytical Chemistry GERMANY
| | - Patrick Wilde
- Ruhr-Universität Bochum: Ruhr-Universitat Bochum Analytical Chemistry GERMANY
| | - Dulce M. Morales
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH: Helmholtz-Zentrum Berlin fur Materialien und Energie GmbH Nachwuchsgruppe Gestaltung des Sauerstoffentwicklungsmechanismus GERMANY
| | - Corina Andronescu
- University of Duisburg Essen - Campus Duisburg: Universitat Duisburg-Essen Technical Chemistry 3 GERMANY
| | - Wolfgang Schuhmann
- Ruhr-Universitat Bochum Analytische Chemie Universitätsstr 150 44780 Bochum GERMANY
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Gong W, Zhang H, Yang L, Yang Y, Wang J, Liang H. Core@shell MOFs derived Co2P/CoP@NPGC as a highly-active bifunctional electrocatalyst for ORR/OER. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2021.11.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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12
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Morales DM, Jambrec D, Kazakova MA, Braun M, Sikdar N, Koul A, Brix AC, Seisel S, Andronescu C, Schuhmann W. Electrocatalytic Conversion of Glycerol to Oxalate on Ni Oxide Nanoparticles-Modified Oxidized Multiwalled Carbon Nanotubes. ACS Catal 2022. [DOI: 10.1021/acscatal.1c04150] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Dulce M. Morales
- Analytical Chemistry − Center of Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstr. 150, D-44780 Bochum, Germany
| | - Daliborka Jambrec
- Analytical Chemistry − Center of Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstr. 150, D-44780 Bochum, Germany
| | - Mariya A. Kazakova
- Boreskov Institute of Catalysis, SB RAS, Lavrentieva 5, 630090 Novosibirsk, Russia
| | - Michael Braun
- Chemical Technology III, Faculty of Chemistry and CENIDE Center for Nanointegration, University of Duisburg-Essen, Carl-Benz-Straße 199, 47057 Duisburg, Germany
| | - Nivedita Sikdar
- Analytical Chemistry − Center of Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstr. 150, D-44780 Bochum, Germany
| | - Adarsh Koul
- Analytical Chemistry − Center of Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstr. 150, D-44780 Bochum, Germany
| | - Ann Cathrin Brix
- Analytical Chemistry − Center of Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstr. 150, D-44780 Bochum, Germany
| | - Sabine Seisel
- Analytical Chemistry − Center of Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstr. 150, D-44780 Bochum, Germany
| | - Corina Andronescu
- Chemical Technology III, Faculty of Chemistry and CENIDE Center for Nanointegration, University of Duisburg-Essen, Carl-Benz-Straße 199, 47057 Duisburg, Germany
| | - Wolfgang Schuhmann
- Analytical Chemistry − Center of Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstr. 150, D-44780 Bochum, Germany
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Rushiti A, Hättig C. Activation of Molecular O 2 on CoFe 2 O 4 (001) Surfaces: An Embedded Cluster Study. Chemistry 2021; 27:17115-17126. [PMID: 34668611 PMCID: PMC9299649 DOI: 10.1002/chem.202102784] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Indexed: 11/22/2022]
Abstract
Dioxygen activation pathways on the (001) surfaces of cobalt ferrite, CoFe2 O4 , were investigated computationally using density functional theory and the hybrid Perdew-Burke-Ernzerhof exchange-correlation functional (PBE0) within the periodic electrostatic embedded cluster model. We considered two terminations: the A-layer exposing Fe2+ and Co2+ metal sites in tetrahedral and octahedral positions, respectively, and the B-layer exposing octahedrally coordinated Co3+ . On the A-layer, molecular oxygen is chemisorbed as a superoxide on the Fe monocenter or bridging a Fe-Co cation pair, whereas on the B-layer it is adsorbed at the most stable anionic vacancy. Activation is promoted by transfer of electrons provided by the d metal centers onto the adsorbed oxygen. The subsequent dissociation of dioxygen into monoatomic species and surface reoxidation have been identified as the most critical steps that may limit the rate of the oxidation processes. Of the reactive metal-O species, [FeIII -O]2+ is thermodynamically most stable, while the oxygen of the Co-O species may easily migrate across the A-layer with barriers smaller than the associative desorption.
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Affiliation(s)
- Arjeta Rushiti
- Department of Theoretical ChemistryRuhr University Bochum44780BochumGermany
| | - Christof Hättig
- Department of Theoretical ChemistryRuhr University Bochum44780BochumGermany
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14
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Chen Q, Yang D, Wang Y, Long Y, Fan G. Hollow Hydrangea-Like CoRu/Co Architecture as an Excellent Electrocatalyst for Oxygen Evolution. CHEMSUSCHEM 2021; 14:3959-3966. [PMID: 34323014 DOI: 10.1002/cssc.202101316] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 07/27/2021] [Indexed: 06/13/2023]
Abstract
Developing low-cost but efficient electrocatalysts to promote the sluggish kinetics of oxygen evolution from water splitting is essential for hydrogen production. In this study, a hierarchical hollow hydrangea-like CoRu/Co superstructure is constructed through a self-templating method by morphology-controlled pyrolysis of flower-like Ru-doped Co-based layered double hydroxides (LDH). The anchoring of Ru into Co-LDH is the key to the formation of well-defined hydrangea-like three-dimensional superstructure composed of CoRu/Co. The optimized CoRu/Co-M-350 with a low Ru loading of 3.0 wt% exhibits excellent catalytic performances in the oxygen evolution reaction (OER) with low overpotential (η10 =192 mV) and excellent stability for 100 h at 100 mA cm-2 in alkaline media, outperforming the benchmark RuO2 and most reported electrocatalysts. The superior morphology and structural features of CoRu/Co-M-350 provide not only abundant accessible surface sites but also fast mass and electron transfer, thereby promoting OER catalysis. The present study provides a new synthetic route for preparing highly active OER electrocatalysts.
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Affiliation(s)
- Qian Chen
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, P. R. China
| | - Dandan Yang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, P. R. China
| | - Yi Wang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, P. R. China
| | - Yan Long
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, P. R. China
| | - Guangyin Fan
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, P. R. China
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15
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Carbon-Based Composites as Electrocatalysts for Oxygen Evolution Reaction in Alkaline Media. MATERIALS 2021; 14:ma14174984. [PMID: 34501072 PMCID: PMC8434594 DOI: 10.3390/ma14174984] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/21/2021] [Accepted: 08/24/2021] [Indexed: 12/15/2022]
Abstract
This review paper presents the most recent research progress on carbon-based composite electrocatalysts for the oxygen evolution reaction (OER), which are of interest for application in low temperature water electrolyzers for hydrogen production. The reviewed materials are primarily investigated as active and stable replacements aimed at lowering the cost of the metal electrocatalysts in liquid alkaline electrolyzers as well as potential electrocatalysts for an emerging technology like alkaline exchange membrane (AEM) electrolyzers. Low temperature electrolyzer technologies are first briefly introduced and the challenges thereof are presented. The non-carbon electrocatalysts are briefly overviewed, with an emphasis on the modes of action of different active phases. The main part of the review focuses on the role of carbon–metal compound active phase interfaces with an emphasis on the synergistic and additive effects. The procedures of carbon oxidative pretreatment and an overview of metal-free carbon catalysts for OER are presented. Then, the successful synthesis protocols of composite materials are presented with a discussion on the specific catalytic activity of carbon composites with metal hydroxides/oxyhydroxides/oxides, chalcogenides, nitrides and phosphides. Finally, a summary and outlook on carbon-based composites for low temperature water electrolysis are presented.
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16
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Morales DM, Villalobos J, Kazakova MA, Xiao J, Risch M. Nafion-Induced Reduction of Manganese and its Impact on the Electrocatalytic Properties of a Highly Active MnFeNi Oxide for Bifunctional Oxygen Conversion. ChemElectroChem 2021; 8:2979-2983. [PMID: 34595088 PMCID: PMC8457226 DOI: 10.1002/celc.202100744] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/21/2021] [Indexed: 11/30/2022]
Abstract
Electrocatalysts for bifunctional oxygen reduction (ORR) and oxygen evolution reactions (OER) are commonly studied under hydrodynamic conditions, rendering the use of binders necessary to ensure the mechanical stability of the electrode films. The presence of a binder, however, may influence the properties of the materials under examination to an unknown extent. Herein, we investigate the impact of Nafion on a highly active ORR/OER catalyst consisting of MnFeNi oxide nanoparticles supported on multi-walled carbon nanotubes. Electrochemical studies revealed that, in addition to enhancing the mechanical stability and particle connectivity, Nafion poses a major impact on the ORR selectivity, which correlates with a decrease in the valence state of Mn according to X-ray absorption spectroscopy. These findings call for awareness regarding the use of electrode additives, since in some cases the extent of their impact on the properties of electrode films cannot be regarded as negligible.
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Affiliation(s)
- Dulce M. Morales
- Nachwuchsgruppe Gestaltung des SauerstoffentwicklungsmechanismusHelmholtz-Zentrum Berlin für Materialien und Energie GmbHHahn-Meitner-Platz 114109BerlinGermany
| | - Javier Villalobos
- Nachwuchsgruppe Gestaltung des SauerstoffentwicklungsmechanismusHelmholtz-Zentrum Berlin für Materialien und Energie GmbHHahn-Meitner-Platz 114109BerlinGermany
| | - Mariya A. Kazakova
- Boreskov Institute of CatalysisSB RASLavrentieva 5630090NovosibirskRussia
| | - Jie Xiao
- Department of Highly Sensitive X-ray SpectroscopyHelmholtz-Zentrum Berlin für Materialien und Energie GmbHAlbert-Einstein-Straße 1512489BerlinGermany
| | - Marcel Risch
- Nachwuchsgruppe Gestaltung des SauerstoffentwicklungsmechanismusHelmholtz-Zentrum Berlin für Materialien und Energie GmbHHahn-Meitner-Platz 114109BerlinGermany
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17
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Kazakova MA, Koul A, Golubtsov GV, Selyutin AG, Ishchenko AV, Kvon RI, Kolesov BA, Schuhmann W, Morales DM. Nitrogen and Oxygen Functionalization of Multi‐Walled Carbon Nanotubes for Tuning the Bifunctional Oxygen Reduction/Oxygen Evolution Performance of Supported FeCo Oxide Nanoparticles. ChemElectroChem 2021. [DOI: 10.1002/celc.202100556] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Mariya A. Kazakova
- Boreskov Institute of Catalysis SB RAS Lavrentieva 5 630090 Novosibirsk Russia
| | - Adarsh Koul
- Analytical Chemistry – Center for Electrochemical Sciences (CES) Faculty of Chemistry and Biochemistry Ruhr University Bochum Universitätsstr. 150 44780 Bochum Germany
| | | | | | - Arcady V. Ishchenko
- Boreskov Institute of Catalysis SB RAS Lavrentieva 5 630090 Novosibirsk Russia
| | - Ren I. Kvon
- Boreskov Institute of Catalysis SB RAS Lavrentieva 5 630090 Novosibirsk Russia
| | - Boris A. Kolesov
- Nikolaev Institute of Inorganic Chemistry SB RAS Lavrentieva 3 630090 Novosibirsk Russia
| | - Wolfgang Schuhmann
- Analytical Chemistry – Center for Electrochemical Sciences (CES) Faculty of Chemistry and Biochemistry Ruhr University Bochum Universitätsstr. 150 44780 Bochum Germany
| | - Dulce M. Morales
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Nachwuchsgruppe Gestaltung des Sauerstoffentwicklungsmechanismus Hahn-Meitner-Platz 1 14109 Berlin Germany
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18
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Towards the Hydrogen Economy—A Review of the Parameters That Influence the Efficiency of Alkaline Water Electrolyzers. ENERGIES 2021. [DOI: 10.3390/en14113193] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Environmental issues make the quest for better and cleaner energy sources a priority. Worldwide, researchers and companies are continuously working on this matter, taking one of two approaches: either finding new energy sources or improving the efficiency of existing ones. Hydrogen is a well-known energy carrier due to its high energy content, but a somewhat elusive one for being a gas with low molecular weight. This review examines the current electrolysis processes for obtaining hydrogen, with an emphasis on alkaline water electrolysis. This process is far from being new, but research shows that there is still plenty of room for improvement. The efficiency of an electrolyzer mainly relates to the overpotential and resistances in the cell. This work shows that the path to better electrolyzer efficiency is through the optimization of the cell components and operating conditions. Following a brief introduction to the thermodynamics and kinetics of water electrolysis, the most recent developments on several parameters (e.g., electrocatalysts, electrolyte composition, separator, interelectrode distance) are highlighted.
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Basavegowda N, Baek KH. Multimetallic Nanoparticles as Alternative Antimicrobial Agents: Challenges and Perspectives. Molecules 2021; 26:912. [PMID: 33572219 PMCID: PMC7915418 DOI: 10.3390/molecules26040912] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 02/03/2021] [Accepted: 02/04/2021] [Indexed: 12/13/2022] Open
Abstract
Recently, infectious diseases caused by bacterial pathogens have become a major cause of morbidity and mortality globally due to their resistance to multiple antibiotics. This has triggered initiatives to develop novel, alternative antimicrobial materials, which solve the issue of infection with multidrug-resistant bacteria. Nanotechnology using nanoscale materials, especially multimetallic nanoparticles (NPs), has attracted interest because of the favorable physicochemical properties of these materials, including antibacterial properties and excellent biocompatibility. Multimetallic NPs, particularly those formed by more than two metals, exhibit rich electronic, optical, and magnetic properties. Multimetallic NP properties, including size and shape, zeta potential, and large surface area, facilitate their efficient interaction with bacterial cell membranes, thereby inducing disruption, reactive oxygen species production, protein dysfunction, DNA damage, and killing potentiated by the host's immune system. In this review, we summarize research progress on the synergistic effect of multimetallic NPs as alternative antimicrobial agents for treating severe bacterial infections. We highlight recent promising innovations of multimetallic NPs that help overcome antimicrobial resistance. These include insights into their properties, mode of action, the development of synthetic methods, and combinatorial therapies using bi- and trimetallic NPs with other existing antimicrobial agents.
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Affiliation(s)
| | - Kwang-Hyun Baek
- Department of Biotechnology, Yeungnam University, Gyeongsan, Gyeongbuk 38451, Korea;
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20
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Yakovlev IV, Yakushkin SS, Kazakova MA, Trukhan SN, Volkova ZN, Gerashchenko AP, Andreev AS, Ishchenko AV, Martyanov ON, Lapina OB, d'Espinose de Lacaillerie JB. Superparamagnetic behaviour of metallic Co nanoparticles according to variable temperature magnetic resonance. Phys Chem Chem Phys 2021; 23:2723-2730. [PMID: 33492314 DOI: 10.1039/d0cp05963c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Investigating the size distributions of Co nanoparticle ensembles is an important problem, which has no straightforward solution. In this work, we use the combination of 59Co internal field nuclear magnetic resonance (59Co IF NMR) and ferromagnetic resonance (FMR) spectroscopies on a metallic Co nanoparticle sample with a narrow Co nanoparticle size distribution due to encapsulation within the inner channels of carbon nanotubes. High-resolution transmission electron microscopy (TEM) images showed that the nanoparticles can be represented as prolate spheroids, with the majority of particles having an aspect ratio between 1 and 2. This observation has increased the accuracy of superparamagnetic blocking size calculations from Néel relaxation model by introducing the actual volume of the ellipsoids taken from the image processing. 59Co IF NMR and FMR experiments conducted under different temperatures allowed us to observe the thermal blocking of superparamagnetic particles in full accordance with the TEM particle volume distribution. This proved that these magnetic resonance techniques can be used jointly for characterization of Co nanoparticles in the bulk of the sample.
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Affiliation(s)
- Ilya V Yakovlev
- Boreskov Institute of Catalysis SB RAS, 5 Pr. Lavrentieva, 630090, Novosibirsk, Russia. and Novosibirsk State University, 1 Pirogova, 630090, Novosibirsk, Russia and SIMM, ESPCI Paris, Université PSL, CNRS UMR 7615, 10 Rue Vauquelin, 75005, Paris, France.
| | - Stanislav S Yakushkin
- Boreskov Institute of Catalysis SB RAS, 5 Pr. Lavrentieva, 630090, Novosibirsk, Russia.
| | - Mariya A Kazakova
- Boreskov Institute of Catalysis SB RAS, 5 Pr. Lavrentieva, 630090, Novosibirsk, Russia.
| | - Sergey N Trukhan
- Boreskov Institute of Catalysis SB RAS, 5 Pr. Lavrentieva, 630090, Novosibirsk, Russia.
| | - Zoya N Volkova
- Mikheev Institute of Metal Physics UB RAS, 18 S. Kovalevskoi, 620990, Ekaterinburg, Russia
| | | | - Andrey S Andreev
- Total Research and Technology Feluy (TRTF), Zone Industrielle C, 7181 Feluy, Belgium
| | - Arcady V Ishchenko
- Boreskov Institute of Catalysis SB RAS, 5 Pr. Lavrentieva, 630090, Novosibirsk, Russia.
| | - Oleg N Martyanov
- Boreskov Institute of Catalysis SB RAS, 5 Pr. Lavrentieva, 630090, Novosibirsk, Russia.
| | - Olga B Lapina
- Boreskov Institute of Catalysis SB RAS, 5 Pr. Lavrentieva, 630090, Novosibirsk, Russia. and Novosibirsk State University, 1 Pirogova, 630090, Novosibirsk, Russia
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21
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Balamurugan C, Song S, Jo H, Seo J. GdFeO 3 Perovskite Oxide Decorated by Group X Heterometal Oxides and Bifunctional Oxygen Electrocatalysis. ACS APPLIED MATERIALS & INTERFACES 2021; 13:2788-2798. [PMID: 33410321 DOI: 10.1021/acsami.0c21169] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Bifunctional electrocatalysts for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are necessary in the renewable energy systems. However, the kinetically slow and large energy-demanding procedures of oxygen electrocatalysis make the preparation of bifunctional catalysts difficult. In this work, we report a novel hierarchical GdFeO3 perovskite oxide of a spherelike nanostructure and surface modification with the group X heterometal oxides. The nanostructured GdFeO3 layer behaved as a bifunctional electrocatalyst in the oxygen electrocatalysis of OER and ORR. Moreover, the surface decoration with catalytically active PtOx + Ni/NiO nanoparticles enhanced the electrocatalytic performances substantially. Incorporation of mesoporous PtOx + Ni/NiO nanoparticles into the porous GdFeO3 nanostructure enlarged the electrochemically active surface area and provided the interconnected nanostructures to facilitate the OER/ORR. The nanostructures were visualized by scanning electron microscopy and transmission electron microscopy images, and the surface area and pore size of nanoparticles were analyzed from N2 adsorption/desorption isotherms. Tafel analysis indicates that surface modification effectively improves the kinetics of oxygen reactions and accordingly increases the electrocatalytic efficiency. Finally, the 2 wt % PtOx + NiO|GdFeO3 (x = 0, 1, and 2) electrode achieved the enhanced OER performance with an overpotential of 0.19 V at 10 mA/cm2 in an alkaline solution and a high turnover frequency of 0.28 s-1 at η = 0.5 V. Furthermore, the ORR activity is observed with an onset potential of 0.80 V and a half-wave potential (E1/2) of 0.40 V versus reversible hydrogen electrode.
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Affiliation(s)
- Chandran Balamurugan
- Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Seungjin Song
- Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Hyeonjeong Jo
- Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Junhyeok Seo
- Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
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22
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Vatutina YV, Kazakova MA, Gerasimov EY, Prosvirin IP, Klimov OV, Noskov AS, Kazakov MO. Effect of Organic Additives on the Structure and Hydrotreating Activity of a CoMoS/Multiwalled Carbon Nanotube Catalyst. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c03915] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yulia V. Vatutina
- Boreskov Institute of Catalysis SB RAS, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russia
| | - Mariya A. Kazakova
- Boreskov Institute of Catalysis SB RAS, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russia
| | | | | | - Oleg V. Klimov
- Boreskov Institute of Catalysis SB RAS, Novosibirsk 630090, Russia
| | | | - Maxim O. Kazakov
- Boreskov Institute of Catalysis SB RAS, Novosibirsk 630090, Russia
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23
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Golubtsov GV, Kazakova MA, Selyutin AG, Ishchenko AV, Kuznetsov VL. Mono-, Bi-, and Trimetallic Catalysts for the Synthesis of Multiwalled Carbon Nanotubes Based on Iron Subgroup Metals. J STRUCT CHEM+ 2020. [DOI: 10.1134/s0022476620040186] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Morales DM, Kazakova MA, Purcel M, Masa J, Schuhmann W. The sum is more than its parts: stability of MnFe oxide nanoparticles supported on oxygen-functionalized multi-walled carbon nanotubes at alternating oxygen reduction reaction and oxygen evolution reaction conditions. J Solid State Electrochem 2020. [DOI: 10.1007/s10008-020-04667-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
AbstractSuccessful design of reversible oxygen electrocatalysts does not only require to consider their activity towards the oxygen reduction (ORR) and the oxygen evolution reactions (OER), but also their electrochemical stability at alternating ORR and OER operating conditions, which is important for potential applications in reversible electrolyzers/fuel cells or metal/air batteries. We show that the combination of catalyst materials containing stable ORR active sites with those containing stable OER active sites may result in a stable ORR/OER catalyst if each of the active components can satisfy the current demand of their respective reaction. We compare the ORR/OER performances of oxides of Mn (stable ORR active sites), Fe (stable OER active sites), and bimetallic Mn0.5Fe0.5 (reversible ORR/OER catalyst) supported on oxidized multi-walled carbon nanotubes. Despite the instability of Mn and Fe oxide for the OER and the ORR, respectively, Mn0.5Fe0.5 exhibits high stability for both reactions.
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