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Mehra P, Tavar D, Prakash S, Sharma RK, Srivastava AK, Paul A, Singh A. One-Step High-Temperature Electrodeposition of Fe-Based Films as Efficient Water Oxidation Catalysts. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:6088-6101. [PMID: 37068156 DOI: 10.1021/acs.langmuir.3c00177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Electrolysis of water to produce hydrogen requires an efficient catalyst preferably made of cheap and abundant metal ions for the improved water oxidation reaction. An Fe-based film has been deposited in a single step by electrochemical deposition at temperatures higher than the room temperature. Until now, the electrodeposition of iron oxide has been carried out at 298 K or at lower temperatures under a controlled atmosphere to prohibit atmospheric oxidation of Fe2+ of the iron precursor. A metal inorganic complex, ferrocene, and non-aqueous electrolyte medium propylene carbonate have been used to achieve electrodeposition of iron oxide without the need of any inert or controlled atmosphere. At 298 K, the amorphous film was formed, whereas at 313 K and at higher temperatures, the hematite film was grown, as confirmed by X-ray diffraction. The transformation of iron of the ferrocene into a higher oxidation state under the experimental conditions used was further confirmed by X-ray photoelectron spectroscopy, ultraviolet-visible, and electron paramagnetic resonance spectroscopic methods. The films deposited at 313 K showed the best performance for water oxidation with remarkable long-term electrocatalytic stability and an impressive turnover frequency of 0.028 s-1 which was 4.5 times higher than that of films deposited at 298 K (0.006 s-1). The observed overpotential to achieve a current density of 10 mA cm-2 was found to be 100 mV less for the film deposited at 313 K compared to room-temperature-derived films under similar experimental conditions. Furthermore, electrochemical impedance data revealed that films obtained at 313 K have the least charge transfer resistance (114 Ω) among all, supporting the most efficient electron transport in the film. To the best of our knowledge, this is the first-ever report where the crystalline iron-based film has been shown to be electrodeposited without any post-deposition additional treatment for alkaline oxygen evolution reaction application.
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Affiliation(s)
- Palak Mehra
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal-by-pass Road, Bhauri, Bhopal, Madhya Pradesh 462066, India
| | - Deepika Tavar
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
- CSIR─Advanced Material and Processes Research Institute (AMPRI), Bhopal, Madhya Pradesh 462026, India
| | - Satya Prakash
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
- CSIR─Advanced Material and Processes Research Institute (AMPRI), Bhopal, Madhya Pradesh 462026, India
| | - Rajendra K Sharma
- Raja Ramanna Centre for Advance Technology (RRCAT), Indore, Madhya Pradesh 452013, India
| | - Avanish Kumar Srivastava
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
- CSIR─Advanced Material and Processes Research Institute (AMPRI), Bhopal, Madhya Pradesh 462026, India
| | - Amit Paul
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal-by-pass Road, Bhauri, Bhopal, Madhya Pradesh 462066, India
| | - Archana Singh
- Academy of Scientific & Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
- CSIR─Advanced Material and Processes Research Institute (AMPRI), Bhopal, Madhya Pradesh 462026, India
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Binder-Free Fabrication of Prussian Blue Analogues Based Electrocatalyst for Enhanced Electrocatalytic Water Oxidation. Molecules 2022; 27:molecules27196396. [PMID: 36234933 PMCID: PMC9571080 DOI: 10.3390/molecules27196396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 09/13/2022] [Accepted: 09/21/2022] [Indexed: 11/16/2022] Open
Abstract
Developing a cost-effective, efficient, and stable oxygen evolution reaction (OER) catalyst is of great importance for sustainable energy conversion and storage. In this study, we report a facile one-step fabrication of cationic surfactant-assisted Prussian blue analogues (PBAs) Mx[Fe(CN)5CH3C6H4NH2]∙yC19H34NBr abbreviated as SF[Fe-Tol-M] (where SF = N-tridecyl-3-methylpyridinium bromide and M = Mn, Co and Ni) as efficient heterogeneous OER electrocatalysts. The electrocatalysts have been characterized by Fourier transform infrared (FT-IR) spectroscopy, powder X-ray diffraction (PXRD), scanning electron microscopy (SEM) coupled with energy dispersive X-ray (EDX) analysis, and X-ray photoelectron spectroscopy (XPS). In the presence of cationic surfactant (SF), PBAs-based electrodes showed enhanced redox current, high surface area and robust stability compared to the recently reported PBAs. SF[Fe-Tol-Co] hybrid catalyst shows superior electrochemical OER activity with a much lower over-potential (610 mV) to attain the current density of 10 mA cm−2 with the Tafel slope value of 103 mV·dec−1 than that for SF[Fe-Tol-Ni] and SF[Fe-Tol-Mn]. Moreover, the electrochemical impedance spectroscopy (EIS) unveiled that SF[Fe-Tol-Co] exhibits smaller charge transfer resistance, which results in a faster kinetics towards OER. Furthermore, SF[Fe-Tol-Co] offered excellent stability for continues oxygen production over extended reaction time. This work provides a surface assisted facile electrode fabrication approach for developing binder-free OER electrocatalysts for efficient water oxidation.
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Gupta R, Jash P, Pritam A, Mondal PC. Electrochemically Deposited Molecular Thin Films on Transparent Conductive Oxide substrate: Combined DC and AC Approaches for Characterization. CAN J CHEM 2022. [DOI: 10.1139/cjc-2021-0254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Transparent conductive oxides such as indium tin oxide (ITO) substrates are commonly employed as prime materials for optoelectronic applications. Enhancement in functions of such devices often compels stable and robust modification of the ITO substrate to improve its interfacial charge transfer characteristics. Thereby, in this work, naphthyl modifier multilayer films are fabricated on ITO substrate using conventional electrochemical reduction of 1-naphthyl diazonium salts (NAPH-D) via altering its concentration ranging from 2 mM to 12 mM with a step size of 2. Surface coverage was significantly tuned by varying NAPH-D concentration, keeping other parameters such as the number of scans and scan rate constant. For lower concentration (2 mM), the molecular thickness ~ 6 nm was obtained, whereas, with higher concentration (12 mM) produced around 15-18 nm thickness. Atomic force microscopy (AFM), cyclic voltammetry and electrochemical impedance spectroscopy (EIS) in the presence of a ferrocene redox probe also supports the formation of well packed molecular film grown on the ITO surface. Further, the wettability property of the grafted naphthyl film was investigated at different surface coverages and correlated with charge transfer resistance (Rct) obtained from EIS studies.
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Affiliation(s)
- Ritu Gupta
- Indian Institute of Technology Kanpur, 30077, Chemistry, Kanpur, Uttar Pradesh, India
| | - Priyajit Jash
- Indian Institute of Technology Kanpur, 30077, Chemistry, Kanpur, Uttar Pradesh, India,
| | - Anurag Pritam
- Indian Institute of Technology Kanpur, 30077, Chemistry, Kanpur, Uttar Pradesh, India,
| | - Prakash Chandra Mondal
- Indian Institute of Technology Kanpur, 30077, Chemistry, OLD SAC, BLOCK A, Office 5, Kanpur, Uttar Pradesh, India, 208016,
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Rahim MA, Mahbub S, Ahsan SA, Alam M, Saha M, Shahriar I, Rana S, Halim MA, Hoque MA, Kumar D, Khan JM. Conductivity, cloud point and molecular dynamics investigations of the interaction of surfactants with ciprofloxacin hydrochloride drug: Effect of electrolytes. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114683] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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New 3-D Mn(II) coordination polymer with redox active oxalate linker; an efficient and robust electrocatalyst for oxygen evolution reaction. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.119982] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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