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Ghaemmaghami M, Yamini Y. Three-Dimensional Network of Highly Uniform Cobalt Oxide Microspheres/MXene Composite as a High-Performance Electrocatalyst in Hydrogen Evolution Reaction. ACS APPLIED MATERIALS & INTERFACES 2024; 16:18782-18789. [PMID: 38567820 DOI: 10.1021/acsami.3c17883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Due to its affordable cost, excellent redox capability, and relatively effective resistance to corrosion in alkaline environments, spinel Co3O4 demonstrates potential as a viable alternative to noble-metal-based electrocatalysts. Nevertheless, these materials continue to exhibit drawbacks, such as limited active surface area and inadequate intrinsic conductivity. Researchers have been trying to increase the electrical conductivity of Co3O4 nanostructures by integrating them with various conductive substrates due to the low conductivity of pristine Co3O4. In this study, uniform cobalt glycerate solid spheres are first synthesized as the precursor and subsequently transformed into cobalt oxide microspheres by a simple annealing procedure. Co3O4 grown on the surface of Ti3C2Tx-MXene nanosheets (Co3O4/MXene) was successfully synthesized through electrostatic attraction. In order to create a positively charged surface, the Co3O4 microspheres were treated with aminopropyltriethoxysilane. The Co3O4/MXene exhibited a low overpotential of 118 mV at 10 mA cm-2 and a Tafel slope of 113 mV dec-1 for the hydrogen evolution reaction, which is much lower than the pristine Co3O4 at 232 and 195.3 mV dec-1.
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Affiliation(s)
- Mostafa Ghaemmaghami
- Department of Chemistry, Faculty of Basic Sciences, Tarbiat Modares University, P.O. Box 14115-175, Tehran 14117-13116, Iran
| | - Yadollah Yamini
- Department of Chemistry, Faculty of Basic Sciences, Tarbiat Modares University, P.O. Box 14115-175, Tehran 14117-13116, Iran
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Andaveh R, Sabour Rouhaghdam A, Seif A, Wang K, Maleki M, Ai J, Barati Darband G, Li J. In Situ Assembly of a Superaerophobic CoMn/CuNiP Heterostructure as a Trifunctional Electrocatalyst for Ampere-Level Current Density Urea-Assisted Hydrogen Production. ACS APPLIED MATERIALS & INTERFACES 2024; 16:8717-8732. [PMID: 38326933 DOI: 10.1021/acsami.3c16122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
Urea electrolysis is a promising energy-efficient hydrogen production process with environmental benefits, but the lack of efficient and sustainable ampere-level current density electrocatalysts fabricated through simple methods is a major challenge for commercialization. Herein, we present an efficient and stable heterostructure electrocatalyst for full urea and water electrolysis in a convenient and time-efficient preparation manner. Overall, superhydrophilic/superaerophobic CoMn/CuNiP/NF exhibits exceptional performance for the hydrogen evolution reaction (HER) (-33.8, -184.4, and -234.8 mV at -10, -500, and -1000 mA cm-2, respectively), urea electro-oxidation reaction (UOR) [1.28, 1.43, and 1.51 V (vs RHE) at 10, 500, and 1000 mA cm-2, respectively], and oxygen evolution reaction (OER) [1.45, 1.67, and 1.74 V (vs RHE) at 10, 500, and 1000 mA cm-2, respectively]. Moreover, the superaerophobic CoMn/CuNiP/NF demonstrates promising potential in full urea (1.33, 1.57, and 1.60 V at 10, 500, and 1000 mA cm-2, respectively) and water (1.46 V, 1.78, and 1.86 at 10, 500, and 1000 mA cm-2, respectively) electrolysis. Based on X-ray photoelectron spectroscopy results, it was determined that the surface of the CoMn/CuNiP electrode was rich in redox pairs such as Ni2+/Ni3+, Cu+/Cu2+, Co2+/Co3+, and Mn2+/Mn3+, which are crucial for the formation of active sites for the OER and UOR, such as NiOOH, MnOOH, and CoOOH, thereby enhancing the catalytic activity. Besides, the in situ assembled CoMn/CuNiP/NF displayed highly stable performance for HER, OER, and UOR with high Faradaic efficiency for over 500 h. This research offers a simple and efficient method for manufacturing a high-efficiency and stable trifunctional electrocatalyst capable of delivering ampere-level current density in urea-assisted hydrogen production. Our density functional theory calculations reveal the potential of CoMn/CuNiP as an effective catalyst, enhancing the electronic properties and catalytic performance. The near-zero Gibbs free-energy change for HER underscores its promise, while reduced CO2 desorption energies and charge redistribution support efficient UOR. These findings signify CoMn/CuNiP's potential for electrochemical applications.
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Affiliation(s)
- Reza Andaveh
- Department of Materials Engineering, Faculty of Engineering, Tarbiat Modares University, Tehran 14115111, P.O. Box: 14115-143, Iran
| | - Alireza Sabour Rouhaghdam
- Department of Materials Engineering, Faculty of Engineering, Tarbiat Modares University, Tehran 14115111, P.O. Box: 14115-143, Iran
| | - Abdolvahab Seif
- Dipartimento di Fisica e Astronomia "G. Galilei", Università di Padova, via Marzolo 8, Padova I-35131, Italy
| | - Kun Wang
- School of Chemistry, Southwest Jiaotong University, Chengdu 610031, China
| | - Meysam Maleki
- Department of Materials Engineering, Faculty of Engineering, Tarbiat Modares University, Tehran 14115111, P.O. Box: 14115-143, Iran
| | - Jianping Ai
- School of Chemistry, Southwest Jiaotong University, Chengdu 610031, China
| | - Ghasem Barati Darband
- Materials and Metallurgical Engineering Department, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad 91775-1111, Iran
| | - Jinyang Li
- School of Chemistry, Southwest Jiaotong University, Chengdu 610031, China
- Yibin Institute of Southwest Jiaotong University, Yibin 644000, China
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Tang C, Zhong L, Xiong R, Xiao Y, Cheng B, Lei S. Regulable in-situ autoredox for anchoring synergistic Ni/NiO nanoparticles on reduced graphene oxide with boosted alkaline electrocatalytic oxygen evolution. J Colloid Interface Sci 2023; 648:181-192. [PMID: 37301143 DOI: 10.1016/j.jcis.2023.05.179] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 05/23/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023]
Abstract
To develop ideal alternatives to noble metal catalysts, transition metal catalysts supported on graphene have been receiving extensive attention in the field of electrochemical energy. In this work, using graphene oxide (GO) and nickel formate as precursors, Ni/NiO synergistic nanoparticles with regulable composition are anchored on reduced graphene oxide (RGO) to prepare Ni/NiO/RGO composite electrocatalysts through in-situ autoredox. Thanks to the synergistic effect of Ni3+ active sites and Ni electron donors, the as-prepared Ni/NiO/RGO catalysts exhibit efficient electrocatalytic oxygen evolution performance in 1.0 M KOH electrolyte. The optimal sample has an overpotential of only 275 mV at a current density of 10 mA cm-2 and a small Tafel slope of 90 mV dec-1, which are very comparable to those of commercial RuO2 catalyst. Additionally, the catalytic capacity and structure remain stable after 2000 cyclic voltammetry cycles. For the electrolytic cell assembled with the best-performing sample as anode and commercial Pt/C as cathode, the current density can reach 10 mA cm-2 at a low potential of 1.57 V and remains stable after 30 h of continuous work. It would be expected that the as-developed Ni/NiO/RGO catalyst with high activity should have broad application prospects.
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Affiliation(s)
- Changcun Tang
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Longsheng Zhong
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Renzhi Xiong
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Yanhe Xiao
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Baochang Cheng
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Shuijin Lei
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China.
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Krause L, Skibińska K, Rox H, Baumann R, Marzec MM, Yang X, Mutschke G, Żabiński P, Lasagni AF, Eckert K. Hydrogen Bubble Size Distribution on Nanostructured Ni Surfaces: Electrochemically Active Surface Area Versus Wettability. ACS APPLIED MATERIALS & INTERFACES 2023; 15:18290-18299. [PMID: 37010817 DOI: 10.1021/acsami.2c22231] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Emerging manufacturing technologies make it possible to design the morphology of electrocatalysts on the nanoscale in order to improve their efficiency in electrolysis processes. The current work investigates the effects of electrode-attached hydrogen bubbles on the performance of electrodes depending on their surface morphology and wettability. Ni-based electrocatalysts with hydrophilic and hydrophobic nanostructures are manufactured by electrodeposition, and their surface properties are characterized. Despite a considerably larger electrochemically active surface area, electrochemical analysis reveals that the samples with more pronounced hydrophobic properties perform worse at industrially relevant current densities. High-speed imaging shows significantly larger bubble detachment radii with higher hydrophobicity, meaning that the electrode surface area that is blocked by gas is larger than the area gained by nanostructuring. Furthermore, a slight tendency toward bubble size reduction of 7.5% with an increase in the current density is observed in 1 M KOH.
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Affiliation(s)
- Lukas Krause
- Institute of Process Engineering and Environmental Technology, Technische Universität Dresden, Helmholtzstraße 14, 01069 Dresden, Germany
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Katarzyna Skibińska
- Faculty of Non-Ferrous Metals, AGH University of Science and Technology, A. Mickiewicza 30, 30-059 Kraków, Poland
- Centrum Badań i Rozwoju Technologii dla Przemysłu S.A., Ludwika Waryńskiego 3A, 00-645 Warszawa, Poland
| | - Hannes Rox
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Robert Baumann
- Institute of Manufacturing Science and Engineering, Technische Universität Dresden, George-Baehr-Straße 3c, 01069 Dresden, Germany
| | - Mateusz M Marzec
- Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, A. Mickiewicza 30, 30-059 Kraków, Poland
| | - Xuegeng Yang
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Gerd Mutschke
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Piotr Żabiński
- Faculty of Non-Ferrous Metals, AGH University of Science and Technology, A. Mickiewicza 30, 30-059 Kraków, Poland
| | - Andrés Fabián Lasagni
- Institute of Manufacturing Science and Engineering, Technische Universität Dresden, George-Baehr-Straße 3c, 01069 Dresden, Germany
- Fraunhofer Institut für Werkstoff- und Strahltechnik IWS, Winterbergstraße 28, 01277 Dresden, Germany
| | - Kerstin Eckert
- Institute of Process Engineering and Environmental Technology, Technische Universität Dresden, Helmholtzstraße 14, 01069 Dresden, Germany
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
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