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Ferriday TB, Nuggehalli Sampathkumar S, Mensi MD, Middleton PH, Van Herle J, Kolhe ML. Tuning Stainless Steel Oxide Layers through Potential Cycling─AEM Water Electrolysis Free of Critical Raw Materials. ACS APPLIED MATERIALS & INTERFACES 2024; 16:29963-29978. [PMID: 38809814 PMCID: PMC11181284 DOI: 10.1021/acsami.4c01107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 05/08/2024] [Accepted: 05/08/2024] [Indexed: 05/31/2024]
Abstract
Anion exchange membrane water electrolyzers (AEMWEs) have an intrinsic advantage over acidic proton exchange membrane water electrolyzers through their ability to use inexpensive, stable materials such as stainless steel (SS) to catalyze the sluggish oxygen evolution reaction (OER). As such, the study of active oxide layers on SS has garnered great interest. Potential cycling is a means to create such active oxide layers in situ as they are readily formed in alkaline solutions when exposed to elevated potentials. Cycling conditions in the literature are rife with unexplained variations, and a complete account of how these variations affect the activity and constitution of SS oxide layers remains unreported, along with their influence on AEMWE performance. In this paper, we seek to fill this gap in the literature by strategically cycling SS felt (SSF) electrodes under different scan rates and ranges. The SSF anodes were rapidly activated within the first 50 cycles, as shown by the 10-fold decline in charge transfer resistance, and the subsequent 1000 cycles tuned the metal oxide surface composition. Cycling the Ni redox couple (RC) increases Ni content, which is further enhanced by lowering the cycling rate, while cycling the Fe RC increases Cr content. Fair OER activity was uncovered through cycling the Ni RC, while Fe cycling produced SSF electrodes active toward both the OER and the hydrogen evolution reaction (HER). This indicates that inert SSF electrodes can be activated to become efficient OER and HER electrodes. To this effect, a single-cell AEMWE without any traditional catalyst or ionomer generated 1.0 A cm-2 at 1.94 V ± 13.3 mV with an SSF anode, showing a fair performance for a cell free of critical raw materials.
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Affiliation(s)
- Thomas Benjamin Ferriday
- Department
of Engineering, University of Agder, Jon Lilletuns vei 9, Grimstad, 4879 Agder, Norway
- Group
of Energy Materials, Swiss Federal Institute
of Technology, Lausanne, Rue de l’Industrie
17, Sion, 1951 Valais, Switzerland
| | - Suhas Nuggehalli Sampathkumar
- Department
of Engineering, University of Agder, Jon Lilletuns vei 9, Grimstad, 4879 Agder, Norway
- Group
of Energy Materials, Swiss Federal Institute
of Technology, Lausanne, Rue de l’Industrie
17, Sion, 1951 Valais, Switzerland
| | - Mounir Driss Mensi
- X-Ray
Diffraction and Surface Analytics Facility, Swiss Federal Institute of Technology, Lausanne, Rue de l’Industrie 17, Sion, 1951 Valais, Switzerland
| | - Peter Hugh Middleton
- Department
of Engineering, University of Agder, Jon Lilletuns vei 9, Grimstad, 4879 Agder, Norway
- Group
of Energy Materials, Swiss Federal Institute
of Technology, Lausanne, Rue de l’Industrie
17, Sion, 1951 Valais, Switzerland
| | - Jan Van Herle
- Department
of Engineering, University of Agder, Jon Lilletuns vei 9, Grimstad, 4879 Agder, Norway
- Group
of Energy Materials, Swiss Federal Institute
of Technology, Lausanne, Rue de l’Industrie
17, Sion, 1951 Valais, Switzerland
| | - Mohan Lal Kolhe
- Department
of Engineering, University of Agder, Jon Lilletuns vei 9, Grimstad, 4879 Agder, Norway
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Abo-zeid M, El-moghny MA, Shawkey H, Daher A, Abdelkader A, El-deab M. Metal oxide stabilized zirconia modified bio-derived carbon nanosheets as efficient electrocatalysts for oxygen evolution reaction.. [DOI: 10.21203/rs.3.rs-2708309/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Abstract
Zirconia is a promising candidate for many applications, especially when stabilized with metal oxide nanoparticles such as yttria and ceria. Zirconium oxide-based materials supported on carbon nanomaterials have shown excellent performance electrocatalysts due to their outstanding catalytic activities and high stability. In this work, a one-pot hydrothermal method was used to prepare porous stabilized zirconia nanoparticles with yttria and ceria (YSZ and CSZ) anchored on carbon nanosheets derived from molasses fiber waste as a sustainable source and annealing at various temperatures (MCNSs). The prepared composites YSZ/MCNSs and CSZ/MCNSs exhibit superior oxygen evolution reaction (OER) performance in alkaline medium. Various physicochemical analysis techniques such as SEM, EDX, HR-TEM, XRD and XPS are employed to characterize the designed catalysts. The results showed that the doping of molasses fibers exfoliated into 2D nanosheets controlled the growth of the YSZ particles into the nanosize and increased their crystallinity. This improves the electrochemical surface area (ECSA) and stability, and modulates the electronic structure of zirconium, yttrium and cerium which facilitate the adsorption of OH- ions, and all contribute to the higher catalytic activity.
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Mathew S, Hosseinirad E, Kim KC, Chung WS, Li OL, Cho YR. Enhanced electrocatalytic water splitting by Sm and Gd-doped ceria electrocatalysts on Ni foam substrate. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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