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Kumar A, Zhang G, Liu W, Sun X. Electrocatalysis and activity descriptors with metal phthalocyanines for energy conversion reactions. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ahmad A, Davarpanah A, Thangavelu L, Bokov DO, Alshgari RA, Karami AM. Self-assembled pine-like CuCo/CP configuration as efficient electrocatalysts toward electrochemical water splitting. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118635] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Self-Standing Nanoporous NiPd Bimetallic Electrocatalysts with Ultra-Low Pd Loading for Efficient Hydrogen Evolution Reaction. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140077] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Yousaf S, Zulfiqar S, Somaily HH, Warsi MF, Rasheed A, Shahid M, Ahmad I. An efficient and stable iodine-doped nickel hydroxide electrocatalyst for water oxidation: synthesis, electrochemical performance, and stability. RSC Adv 2022; 12:23454-23465. [PMID: 36090404 PMCID: PMC9386693 DOI: 10.1039/d2ra03873k] [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: 06/23/2022] [Accepted: 07/24/2022] [Indexed: 12/31/2022] Open
Abstract
The design of oxygen evolution reaction (OER) catalysts with higher stability and activity by economical and convenient methods is considered particularly important for the energy conversion technology. Herein, a simple hydrothermal method was adopted for the synthesis of iodine-doped nickel hydroxide nanoparticles and their OER performance was explored. The electrocatalysts were structurally characterized by powder X-ray diffraction analysis (P-XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX), and BET analysis. The electrochemical performance of the electrocatalysts was assessed by cyclic voltammetry, linear sweep voltammetry, and electrochemical impedance spectroscopy. The abundant catalytic active sites, oxygen vacancies, low charge-transfer resistance, and a high pore diameter to pore size ratio of iodine-doped Ni(OH)2 were responsible for its excellent catalytic activity, whereby OER was initiated even at 1.52 V (vs. RHE) and a 330 mV overpotential was needed to reach a 40 mV cm−2 current density in 1 M KOH solution. The material also exhibited a low Tafel slope (46 mV dec−1), which suggests faster charge-transfer kinetics as compared to its counterparts tested under the same electrochemical environment. It is worth noting that this facile and effective approach suggests a new way for the fabrication of metal hydroxides rich in oxygen vacancies, thus with the potential to boost the electrochemical performance of energy-related systems. Oxygen evolution reaction mechanism under alkaline conditions over the iodine-doped Ni(OH)2 surface.![]()
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Affiliation(s)
- Sheraz Yousaf
- Institute of Chemistry, The Islamia University of Bahawalpur, Baghdad-ul-Jadeed Campus, Bahawalpur-63100, Pakistan
| | - Sonia Zulfiqar
- Department of Chemistry, School of Sciences & Engineering, The American University in Cairo, New Cairo, 11835, Egypt
| | - H. H. Somaily
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
- Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia
| | - Muhammad Farooq Warsi
- Institute of Chemistry, The Islamia University of Bahawalpur, Baghdad-ul-Jadeed Campus, Bahawalpur-63100, Pakistan
| | - Aamir Rasheed
- Institute of Chemistry, The Islamia University of Bahawalpur, Baghdad-ul-Jadeed Campus, Bahawalpur-63100, Pakistan
| | - Muhammad Shahid
- Department of Chemistry, College of Science, University of Hafr Al Batin, P.O. Box 1803, Hafr Al Batin, 31991, Saudi Arabia
| | - Iqbal Ahmad
- Department of Chemistry, Allama Iqbal Open University, Islamabad, 44000, Pakistan
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Babar NUA, Joya KS. Spray-Coated Thin-Film Ni-Oxide Nanoflakes as Single Electrocatalysts for Oxygen Evolution and Hydrogen Generation from Water Splitting. ACS OMEGA 2020; 5:10641-10650. [PMID: 32455182 PMCID: PMC7240815 DOI: 10.1021/acsomega.9b02960] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 12/25/2019] [Indexed: 05/15/2023]
Abstract
Electrochemical water splitting is a key process in many electrochemical energy conversion and storage phenomena. Simple synthesis methods to make highly porous and active nanostructured catalytic materials with large electroactive surface areas are very important to implement water-to-fuel conversion schemes. Herein, ultrafine, transparent thin-film nickel-oxide (NiO x ) nanoflakes are facilely synthesized following a simple spray-coating method from a solution-phase precursor. The NiO x nanoscale structures are grown on the FTO surface in the form of highly uniform smooth thin films. They are employed as promising bifunctional electrocatalysts for the overall water splitting process under alkaline conditions. During water oxidation catalysis, NiO x -SC/FTO initiates the oxygen evolution reaction (OER) at an overpotential η of just 250 mV while generating current decade at just 300 mV and demonstrates well-balanced kinetics toward OER. 10 mA cm-2 current density remains persistent for many hours of continuous electrolysis at just 1.53 VRHE illustrating high robustness of the system. The catalyst also showed substantial activity and durability toward the hydrogen evolution reaction (HER) under the same electrochemical conditions. Tafel slopes of just 57 and 89 mV dec-1 for OER and HER in 0.5 M aqueous KOH solution, respectively, showing high intrinsic kinetics for electrocatalysis. Having high electrochemical surface area and an optimum number of electrochemically active sites, these transparent NiO x thin films can be advantageously combined with photoelectrochemical devices for light-driven water-to-fuel conversion systems.
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Affiliation(s)
- Noor-Ul-Ain Babar
- Department of Chemistry, University of Engineering and Technology, G. T. Road, 54890 Lahore, Pakistan
| | - Khurram Saleem Joya
- Department of Chemistry, University of Engineering and Technology, G. T. Road, 54890 Lahore, Pakistan
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Babar NUA, Joya KS. Cobalt Colloid-derived Efficient and Durable Nanoscale Electrocatalytic Films for High-Activity Water Oxidation. ACS OMEGA 2020; 5:10651-10662. [PMID: 32455183 PMCID: PMC7240820 DOI: 10.1021/acsomega.9b03576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 03/09/2020] [Indexed: 05/11/2023]
Abstract
Oxygen evolution reaction is of immense importance and is vitally necessary for devices such as electrolyzers, fuel cells, and other solar and chemical energy conversion devices. The major challenges that remain in this quest are due to the lack of effective catalytic assemblages operating with optimum efficiency and obtainable following much simpler setups and easily accessible methods. Here, we demonstrate that the robust electrocatalytic activity toward water oxidation can be achieved employing straightforwardly obtainable nanoscale electrocatalysts derived from easily made colloidal-cobalt nanoparticles (Co-CNPs) prepared in clean carbonate systems. Thin-film non-noble metal nanoscale electrocatalysts such as simple Co-CNPs/FTO and annealed Co-CNPs/FTO250 and Co-CNPs/FTO500 obtained by depositing Co-CNPs on the FTO substrate are shown to initiate water oxidation at much lower overpotentials such as just 240 mV for Co-CNPs/FTO250 under mildly alkaline conditions while demonstrating an impressive Tafel slope of just 40 mV dec-1. Furthermore, the robust catalyst demonstrated a high electrochemical surface area of 91 cm2 and high turnover frequency and mass activity of 0.26 s-1 and 18.84 mA mg-1, respectively, just at 0.35 V, and superior durability during long-term electrolysis. These outstanding catalytic outcomes using easily prepared Co-CNPs/FTO250-type catalytic systems are comparable and even better than other noble and non-noble metal-based nanoscale catalytic assemblages obtained by much difficult methods. Most advantageously, the colloidal route also offers the easiest approach of incorporating carbon contents in the catalytic layer, which can ultimately increase mechanical stability and mass transfer capability of the system.
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Affiliation(s)
- Noor-Ul-Ain Babar
- Department of Chemistry, University
of Engineering and Technology (UET), G.T Road, 54890 Lahore, Pakistan
| | - Khurram Saleem Joya
- Department of Chemistry, University
of Engineering and Technology (UET), G.T Road, 54890 Lahore, Pakistan
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Babar NUA, Saddiqa A, Nisar L, Gilani SR, Joya KS. Surface-assembled non-noble metal nanoscale Ni-colloidal thin-films as efficient electrocatalysts for water oxidation. RSC Adv 2019; 9:37274-37286. [PMID: 35542249 PMCID: PMC9075524 DOI: 10.1039/c9ra07388d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 10/30/2019] [Indexed: 12/16/2022] Open
Abstract
A highly operative and inexpensive water oxidation scheme using an efficient nanoscale electrocatalyst is vastly demanded for optimum H2 production, CO2 reduction, and has attracted increased attention for chemical energy conversion. We present here a simple route to make efficient electrocatalytic colloidal nanoparticles of nickel out of mere metal ions in a simple borate buffer system. The simple and annealed Ni-colloidal nanoparticles (Ni-CNPs) resulted in a facile transformation into ultrafine films, which further activated the catalysts, while initiating OER just at the overpotential η = 250 mV (1.48 V vs. RHE) under benign conditions. They also showed high porosity and favorable kinetics while displaying impressive Tafel slopes of just 51 mV dec-1, and a high TOF value of 0.79 s-1 at 0.35 V was observed for Ni-CNPs/FTO500. These electrocatalysts also showed long-term stability during the bulk water electrolysis experiment conducted for a continuous 20 hours without notable catalytic degradation, which ensures their economic benefits. The electrochemical data, CVs, kinetic study, short-term durability, extended catalytic stability, SEM analysis, and other supporting data provide compelling evidence that these non-precious, metal-based, electroactive, catalytic, colloidal thin-films (simple and annealed) with nanoscale morphological attributes presented promising catalytic performance under the conditions used herein.
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Affiliation(s)
- Noor-Ul-Ain Babar
- Department of Chemistry, University of Engineering and Technology (UET) GT Road 54890 Lahore Pakistan
| | - Ayesha Saddiqa
- Department of Chemistry, University of Engineering and Technology (UET) GT Road 54890 Lahore Pakistan
| | - Laraib Nisar
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan-60800 Pakistan
| | - Syeda Robina Gilani
- Department of Chemistry, University of Engineering and Technology (UET) GT Road 54890 Lahore Pakistan
| | - Khurram Saleem Joya
- Department of Chemistry, University of Engineering and Technology (UET) GT Road 54890 Lahore Pakistan
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan-60800 Pakistan
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Babar NUA, Joya KS, Tayyab MA, Ashiq MN, Sohail M. Highly Sensitive and Selective Detection of Arsenic Using Electrogenerated Nanotextured Gold Assemblage. ACS OMEGA 2019; 4:13645-13657. [PMID: 31497682 PMCID: PMC6714603 DOI: 10.1021/acsomega.9b00807] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Accepted: 07/17/2019] [Indexed: 05/05/2023]
Abstract
Arsenic is considered as a toxic heavy metal which is highly detrimental to ecological systems, and long-term exposure to it is highly dangerous to life as it can cause serious health effects. Timely detection of traces of active arsenic (As3+) is very crucial, and the development of simple, cost-effective methods is imperative to address the presence of arsenic in water and food chain. Herein, we present an extensive study on chemical-free electrogenerated nanotextured gold assemblage for the detection of ultralow levels of As3+ in water up to 0.08 ppb concentration. The gold nanotextured electrode (Au/GNE) is developed on simple Au foil via electrochemical oxidation-reduction sweeps in a metal-ion-free electrolyte solution. The ultrafine nanoscale morphological attributes of Au/GNE substrate are studied by scanning electron microscopy. Square wave anodic stripping voltammetry (ASV) response for different concentrations of arsenites is determined and directly correlated with As3+ detection regarding the type of electrolyte solution, deposition potential, and deposition time. The average of three standard curves are linear from 0.1 ppb up to 9 ppb (n = 15) with a linear regression coefficient R 2 = 0.9932. Under optimized conditions, a superior sensitivity of 39.54 μA ppb-1 cm-2 is observed with a lower detection limit of 0.1 ppb (1.3 nM) (based on the visual analysis of calibration curve) and 0.08 ppb (1.06 nM) (based on the standard deviation of linear regression). Furthermore, the electrochemical Au/GNE is also applicable for arsenic detection in a complex system containing Cu2+, Ni2+, Fe2+, Pb2+, Hg2+, and other ions for the selective and sensitive analysis. Au/GNE substrate also possesses remarkable reproducibility and high stability for arsenic detection during repeated analysis and thus can be employed for prolonged applications and reiterating analyses. This electrochemically generated nanotextured electrode is also applicable for As3+ detection and analysis in a real water sample under optimized conditions. Therefore, fabrication conditions and analytical and electroanalytical performances justify that because of its low cost, easy preparation method and assembly, high reproducibility, and robustness, nanosensor Au/GNE can be scaled up for further applications.
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Affiliation(s)
- Noor-Ul-Ain Babar
- Department
of Chemistry, University of Engineering
and Technology (UET), G.T Road, Lahore 54890, Pakistan
| | - Khurram Saleem Joya
- Department
of Chemistry, University of Engineering
and Technology (UET), G.T Road, Lahore 54890, Pakistan
- E-mail:
| | - Muhammad Arsalan Tayyab
- Department
of Chemistry, University of Engineering
and Technology (UET), G.T Road, Lahore 54890, Pakistan
| | - Muhammad Naeem Ashiq
- Institute
of Chemical Sciences, Bahauddin Zakariya
University (BZU), Bosan Road, Multan 60000, Punjab, Pakistan
| | - Manzar Sohail
- Department
of Chemistry, School of Natural Sciences (SNS), National University of Science and Technology (NUST), H-12, Islamabad 46000, Pakistan
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Babar N, Joya KS, Ehsan MA, Khan M, Sharif M. Noble‐Metal‐Free Colloidal‐Copper Based Low Overpotential Water Oxidation Electrocatalyst. ChemCatChem 2019. [DOI: 10.1002/cctc.201900202] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Noor‐Ul‐Ain Babar
- Department of ChemistryUniversity of Engineering and Technology (UET) GT Road 54890 Lahore Pakistan
| | - Khurram Saleem Joya
- Department of ChemistryUniversity of Engineering and Technology (UET) GT Road 54890 Lahore Pakistan
- Department of Energy Conversion and StorageTechnical University of Denmark Frederiksborgvej 399 4000 Roskilde Denmark
- Chemistry DepartmentKing Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia
| | - Muhammad Ali Ehsan
- Center of Research Excellence in Nanotechnology (CENT), King FahdUniversity of Petroleum and Minerals Dhahran 31261 Saudi Arabia
| | - Majad Khan
- Chemistry DepartmentKing Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia
| | - Muhammad Sharif
- Chemistry DepartmentKing Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia
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