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Głowniak S, Szczęśniak B, Choma J, Jaroniec M. Greener Approach Towards Synthesis of Palladium-Decorated Graphene Derivatives for Hydrogen Adsorption. Chemphyschem 2024; 25:e202300553. [PMID: 38227379 DOI: 10.1002/cphc.202300553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2024]
Abstract
A simple, green, and relatively fast procedure was used to prepare palladium decorated graphene-based materials. A parent graphene-like material with a high specific surface area of up to 384 m2 /g and a total pore volume of 0.42 cm3 /g was prepared via a fast, solvent-free ball milling of graphite powder only. Post-synthetic modification of this graphene-like material was performed via a simplified method using palladium chloride and a small amount of a non-harsh reducing agent - formic acid. Palladium decoration (2.1 wt%) allowed obtaining a few times higher hydrogen adsorption (0.42 wt% at 30 °C and 40 bar) compared to that on bare graphene-based materials. Palladium-decorated graphene materials are promising for hydrogen storage and their usage in this application represents an alternative for conventional fossil fuels. The proposed synthesis and post-modification strategies are in line with green synthesis strategies.
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Affiliation(s)
- Sylwia Głowniak
- Institute of Chemistry, Military University of Technology, 00-908, Warsaw, Poland
| | - Barbara Szczęśniak
- Institute of Chemistry, Military University of Technology, 00-908, Warsaw, Poland
| | - Jerzy Choma
- Institute of Chemistry, Military University of Technology, 00-908, Warsaw, Poland
| | - Mietek Jaroniec
- Department of Chemistry and Biochemistry & Advanced Materials and Liquid Crystal Institute, Kent State University, Kent, Ohio, 44242, USA
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Gao Y, Li Z, Wang P, Cui WG, Wang X, Yang Y, Gao F, Zhang M, Gan J, Li C, Liu Y, Wang X, Qi F, Zhang J, Han X, Du W, Chen J, Xia Z, Pan H. Experimentally validated design principles of heteroatom-doped-graphene-supported calcium single-atom materials for non-dissociative chemisorption solid-state hydrogen storage. Nat Commun 2024; 15:928. [PMID: 38296957 PMCID: PMC10830568 DOI: 10.1038/s41467-024-45082-9] [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: 07/15/2023] [Accepted: 01/11/2024] [Indexed: 02/02/2024] Open
Abstract
Non-dissociative chemisorption solid-state storage of hydrogen molecules in host materials is promising to achieve both high hydrogen capacity and uptake rate, but there is the lack of non-dissociative hydrogen storage theories that can guide the rational design of the materials. Herein, we establish generalized design principle to design such materials via the first-principles calculations, theoretical analysis and focused experimental verifications of a series of heteroatom-doped-graphene-supported Ca single-atom carbon nanomaterials as efficient non-dissociative solid-state hydrogen storage materials. An intrinsic descriptor has been proposed to correlate the inherent properties of dopants with the hydrogen storage capability of the carbon-based host materials. The generalized design principle and the intrinsic descriptor have the predictive ability to screen out the best dual-doped-graphene-supported Ca single-atom hydrogen storage materials. The dual-doped materials have much higher hydrogen storage capability than the sole-doped ones, and exceed the current best carbon-based hydrogen storage materials.
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Affiliation(s)
- Yong Gao
- Institute of Science and Technology for New Energy Xi'an Technological University, Xi'an, 710021, China
| | - Zhenglong Li
- Institute of Science and Technology for New Energy Xi'an Technological University, Xi'an, 710021, China
| | - Pan Wang
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Wen-Gang Cui
- Institute of Science and Technology for New Energy Xi'an Technological University, Xi'an, 710021, China
| | - Xiaowei Wang
- Department of Materials Science and Engineering, University of North Texas, Denton, TX, 76203, USA
| | - Yaxiong Yang
- Institute of Science and Technology for New Energy Xi'an Technological University, Xi'an, 710021, China
| | - Fan Gao
- Institute of Science and Technology for New Energy Xi'an Technological University, Xi'an, 710021, China
| | - Mingchang Zhang
- Institute of Science and Technology for New Energy Xi'an Technological University, Xi'an, 710021, China
| | - Jiantuo Gan
- Institute of Science and Technology for New Energy Xi'an Technological University, Xi'an, 710021, China
| | - Chenchen Li
- Institute of Science and Technology for New Energy Xi'an Technological University, Xi'an, 710021, China
| | - Yanxia Liu
- Institute of Science and Technology for New Energy Xi'an Technological University, Xi'an, 710021, China
| | - Xinqiang Wang
- Institute of Science and Technology for New Energy Xi'an Technological University, Xi'an, 710021, China
| | - Fulai Qi
- Institute of Science and Technology for New Energy Xi'an Technological University, Xi'an, 710021, China
| | - Jing Zhang
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Xiao Han
- School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Wubin Du
- School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058, PR China
| | - Jian Chen
- School of Materials Science and Chemical Engineering, Xi'an Technological University, Xi'an, 710021, China.
| | - Zhenhai Xia
- Australian Carbon Materials Centre, School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
| | - Hongge Pan
- Institute of Science and Technology for New Energy Xi'an Technological University, Xi'an, 710021, China.
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Wang Y, Xue Y, Züttel A. Nanoscale engineering of solid-state materials for boosting hydrogen storage. Chem Soc Rev 2024; 53:972-1003. [PMID: 38111973 DOI: 10.1039/d3cs00706e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
The development of novel materials capable of securely storing hydrogen at high volumetric and gravimetric densities is a requirement for the wide-scale usage of hydrogen as an energy carrier. In recent years, great efforts via nanoscale tuning and designing strategies on both physisorbents and chemisorbents have been devoted to improvements in their thermodynamic and kinetic aspects. Increasing the hydrogen storage capacity/density for physisorbents and chemisorbents and improving the dehydrogenation kinetics of hydrides are still considered a challenge. The extensive and fast development of advanced nanotechnologies has fueled a surge in research that presents huge potential in designing solid-state materials to meet the ultimate U.S. Department of Energy capacity targets for onboard light-duty vehicles, material-handling equipments, and portable power applications. Different from the existing literature, in this review, particular attention is paid to the recent advances in nanoscale engineering of solid-state materials for boosting hydrogen storage, especially the nanoscale tuning and designing strategies. We first present a short overview of hydrogen storage mechanisms of nanoscale engineering for boosted hydrogen storage performance on solid-state materials, for example, hydrogen spillover, nanopump effect, nanosize effect, nanocatalysis, and other non-classical hydrogen storage mechanisms. Then, the focus is on recent advancements in nanoscale engineering strategies aimed at enhancing the gravimetric hydrogen storage capacity of porous materials, reducing dehydrogenation temperature and improving reaction kinetics and reversibility of hydrogen desorption/absorption for metal hydrides. Effective nanoscale tuning strategies for enhancing the hydrogen storage performance of porous materials include optimizing surface area and pore volume, fine-tuning nanopore sizes, introducing nanostructure doping, and crafting nanoarchitecture and nanohybrid materials. For metal hydrides, successful strategies involve nanoconfinement, nanosizing, and the incorporation of nanocatalysts. This review further addresses the points to future research directions in the hope of ushering in the practical applications of hydrogen storage materials.
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Affiliation(s)
- Yunting Wang
- Institute of Chemical Sciences and Engineering, École polytechnique fédérale de Lausanne (EPFL), CH-1950 Sion, Switzerland.
- Empa Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Yudong Xue
- Institute of Chemical Sciences and Engineering, École polytechnique fédérale de Lausanne (EPFL), CH-1950 Sion, Switzerland.
| | - Andreas Züttel
- Institute of Chemical Sciences and Engineering, École polytechnique fédérale de Lausanne (EPFL), CH-1950 Sion, Switzerland.
- Empa Materials Science and Technology, 8600 Dübendorf, Switzerland
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Knabl F, Kostoglou N, Terziyska V, Hinder S, Baker M, Bousser E, Rebholz C, Mitterer C. Short-Time Magnetron Sputtering for the Development of Carbon-Palladium Nanocomposites. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:164. [PMID: 38251129 PMCID: PMC10818909 DOI: 10.3390/nano14020164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 01/01/2024] [Accepted: 01/09/2024] [Indexed: 01/23/2024]
Abstract
In recent nanomaterials research, combining nanoporous carbons with metallic nanoparticles, like palladium (Pd), has emerged as a focus due to their potential in energy, environmental and biomedical fields. This study presents a novel approach for synthesizing Pd-decorated carbons using magnetron sputter deposition. This method allows for the functionalization of nanoporous carbon surfaces with Pd nano-sized islands, creating metal-carbon nanocomposites through brief deposition times of up to 15 s. The present research utilized direct current magnetron sputtering to deposit Pd islands on a flexible activated carbon cloth substrate. The surface chemistry, microstructure, morphology and pore structure were analyzed using a variety of material characterization techniques, including X-ray photoelectron spectroscopy, X-ray diffraction, Raman spectroscopy, gas sorption analysis and scanning electron microscopy. The results showed Pd islands of varying sizes distributed across the cloth's carbon fibers, achieving high-purity surface modifications without the use of chemicals. The synthesis method preserves the nanoporous structure of the carbon cloth substrate while adding functional Pd islands, which could be potentially useful in emerging fields like hydrogen storage, fuel cells and biosensors. This approach demonstrates the possibility of creating high-quality metal-carbon composites using a simple, clean and economical method, expanding the possibilities for future nanomaterial-based applications.
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Affiliation(s)
- Florian Knabl
- Department of Materials Science, Montanuniversitӓt Leoben, 8700 Leoben, Austria; (V.T.); (C.R.); (C.M.)
| | - Nikolaos Kostoglou
- Department of Materials Science, Montanuniversitӓt Leoben, 8700 Leoben, Austria; (V.T.); (C.R.); (C.M.)
| | - Velislava Terziyska
- Department of Materials Science, Montanuniversitӓt Leoben, 8700 Leoben, Austria; (V.T.); (C.R.); (C.M.)
| | - Steven Hinder
- Department of Mechanical Engineering Sciences, University of Surrey, Guildford GU2 7XH, UK; (S.H.); (M.B.)
| | - Mark Baker
- Department of Mechanical Engineering Sciences, University of Surrey, Guildford GU2 7XH, UK; (S.H.); (M.B.)
| | - Etienne Bousser
- Centre for Characterization and Microscopy of Materials (CM)2, Polytechnique Montréal, Montréal, QC H3T 1J4, Canada;
| | - Claus Rebholz
- Department of Materials Science, Montanuniversitӓt Leoben, 8700 Leoben, Austria; (V.T.); (C.R.); (C.M.)
- Department of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia 1678, Cyprus
| | - Christian Mitterer
- Department of Materials Science, Montanuniversitӓt Leoben, 8700 Leoben, Austria; (V.T.); (C.R.); (C.M.)
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Vu MT, Ngan Nguyen TT, Hung TQ, Pham-Truong TN, Osial M, Decorse P, Nguyen TT, Piro B, Thu VT. Insights into Structural Behaviors of Thiolated and Aminated Reduced Graphene Oxide Supports to Understand Their Effect on MOR Efficiency. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:13897-13907. [PMID: 37738086 DOI: 10.1021/acs.langmuir.3c01446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
It is essential to develop novel catalysts with high catalytic activity, strong durability, and good stability for further application in methanol fuel cells. In this work, we present for the first time the effect of the chemical functional groups (thiol and amine) with different electron affinity in reduced graphene oxide supports on the morphology and catalytic activity of platinum nanoparticles for the methanol oxidation reaction. Hydroxyl groups on graphene oxide were initially brominated and then transformed to the desired functional groups. The good dispersion of metal nanoparticles over functionalized carbon substrates (particle size less than 5 nm) with good durability, even at a limited functionalization degree (less than 7%) has been demonstrated by morphological and structural studies. The durability of the catalysts was much improved via strong coordination between the metal and nitrogen or sulfur atoms. Impressively, the catalytic activity of platinum nanoparticles on aminated reduced graphene oxide was found to be much better than that on thiolated graphene oxide despite the weaker affinity between amine and noble metals. These findings support further developing new graphene derivatives with the desired functionalization for electronics and energy applications..
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Affiliation(s)
- Minh Thu Vu
- Vietnam Academy of Science and Technology (VAST), University of Science and Technology of Hanoi (USTH), 18 Hoang Quoc Viet, Cau Giay, Hanoi 10000, Vietnam
| | - Thi Thanh Ngan Nguyen
- Vietnam Academy of Science and Technology (VAST), University of Science and Technology of Hanoi (USTH), 18 Hoang Quoc Viet, Cau Giay, Hanoi 10000, Vietnam
| | - Tran Quang Hung
- Vietnam Academy of Science and Technology (VAST), Institute of Chemistry (IOC), 18 Hoang Quoc Viet, Cau Giay, Hanoi 10000, Vietnam
| | | | - Magdalena Osial
- Polish Academy of Sciences, Institute of Fundamental Technological Research, Pawińskiego 5B, Warsaw 02-106, Poland
| | - Philippe Decorse
- Université Paris Cité, ITODYS, CNRS, UMR 7086, 15 rue J.-A. de Baïf, Paris F-75013, France
| | - Thi Thom Nguyen
- Vietnam Academy of Science and Technology (VAST), Institute of Tropical Technology (ITT), 18 Hoang Quoc Viet, Cau Giay, Hanoi 10000, Vietnam
| | - Benoit Piro
- Université Paris Cité, ITODYS, CNRS, UMR 7086, 15 rue J.-A. de Baïf, Paris F-75013, France
| | - Vu Thi Thu
- Vietnam Academy of Science and Technology (VAST), University of Science and Technology of Hanoi (USTH), 18 Hoang Quoc Viet, Cau Giay, Hanoi 10000, Vietnam
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Aleem A, Perveen F. Hydrogen production and storage through adsorption and dissociation of H 2O on pristine and functionalized SWCNT: a DFT approach. J Mol Model 2023; 29:305. [PMID: 37670084 DOI: 10.1007/s00894-023-05678-2] [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: 02/17/2023] [Accepted: 07/25/2023] [Indexed: 09/07/2023]
Abstract
CONTEXT Adsorption of 1 and 2 H2O molecules for hydrogen production and storage on the surface of pristine, carbamic acid and 2-amino 3-acetylpyridine functionalized SWCNTs with the dimensionality of (2, 4), (5, 5), and (6, 0) at various positions, i.e., center and edges were investigated by using computational DFT calculations. Adsorption energies and structural and electronic parameters were determined for pristine and functionalized SWCNTs with four different H2O orientations. Functionalization of 2-amino 3-acetylpyridine resulted in more favorable adsorption energies for 1 and 2 H2O molecules splitting as compared to spitting on pristine and carbamic acid functionalized SWCNT. Calculated adsorption constant, Kad confirmed greater binding interactions of functionalized SWCNTs with 1 and 2 H2O molecules as compared to pristine SWCNT. Isosurface for the adsorption of 1 and 2 H2O molecules on pristine and functionalized SWCNTs elaborated altered electrophilic and nucleophilic character. Effect of H2O concentration was monitored to determine hydrogen storage capacity which was found to be 7.17 wt.% for thirty molecules. An important finding of study is production of Stone-Wales (SW) defect upon H2O adsorption leading to increase in hydrogen production and its storage capacity. The functionalization of topological defected SWCNTs provides distinctive applications of CNTs for gas storage purposes.t: METHODS: In the current study, First Principal Density Functional Theory (DFT) calculations were carried which provides greater computational efficiency as compared to many traditional quantum mechanical methods. SCME: ADF (2018) modeling suite software with in framework of DFT approach using exchange correlation (XC) LDA-GGA (Generalized Gradient Approximation) with PBE (Perdew, Burke and Ernzerhof) functional and DZ (Double beta) basis set was employed to investigate structural, energetic and electronic aspects of adsorption on the surface of pristine, carbamic acid and 2-amino 3-acetly pyridine functionalized SWCNTs. (2, 4), (5, 5) and (6, 0) SWCNTs were designed using Avogadro's software and were imported to SCM: ADF graphical interface and were optimized as adsorbent. Single point energy (SPE), geometry optimization and high accuracy frequency calculations were performed to determine energetic, electronic and thermodynamic characteristics and feasibility of adsorption using XC of GGA-PBE functional & DZ basis set.
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Affiliation(s)
- Aqsa Aleem
- School of Interdisciplinary Engineering & Sciences (SINES), National University of Sciences and Technology (NUST), Sector H-12, Islamabad, 44000, Pakistan
| | - Fouzia Perveen
- School of Interdisciplinary Engineering & Sciences (SINES), National University of Sciences and Technology (NUST), Sector H-12, Islamabad, 44000, Pakistan.
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Luhadiya N, Choyal V, Kundalwal SI, Sahu SK. Investigation of unified impact of Ti adatom and N doping on hydrogen gas adsorption capabilities of defected graphene sheets. J Mol Graph Model 2023; 119:108399. [PMID: 36563644 DOI: 10.1016/j.jmgm.2022.108399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 12/16/2022] [Accepted: 12/16/2022] [Indexed: 12/23/2022]
Abstract
In this work, we studied the hydrogen adsorption capabilities of functionalized graphene sheets containing a variety of defects (D-G) via molecular dynamics (MD) simulations that govern the mechanisms involved in hydrogen adsorption. Specifically, the graphene sheets containing monovacancy (MV), Stone-Wales (SW), and multiple double vacancy (DV) defects were functionalized with Ti and N atoms to enhance their hydrogen adsorption capacity. We measured the adsorption capacities of the N-/D-G sheets with varying concentrations of Ti adatoms at 300 K and 77 K temperatures and various pressures. Our study revealed that the increasing concentration of Ti adatoms on the D-G sheets led to a significant improvement in the hydrogen adsorption capacity of the graphene sheets. The DV(III)-G sheets showed the maximum adsorption capacity at 300 K because the DV(III)-G sheets had a small number of large-sized pores that bind hydrogen with high binding energy. Thus, hydrogen remained adsorbed even at higher temperatures (300 K). The N doping on the D-G sheets initially reduced their hydrogen adsorption capabilities; however, the N-D-G sheets enhanced their hydrogen adsorption capacity with the increasing concentrations of Ti adatoms. Compared to all other defect types, the Ti-N-DV(III)-G sheet with a Ti concentration of 10.5% showed a hydrogen uptake of 5.5 wt% at 300 K and 100 bar pressure. Thus, the N doping and Ti implantations improved the hydrogen storage capabilities of the graphene sheets, and these findings helped design solid-state hydrogen storage systems operating at ambient conditions and moderate pressure ranges.
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Affiliation(s)
- Nitin Luhadiya
- Applied and Theoretical Mechanics (ATOM) Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Indore, Simrol, Indore, 453552, Madhya Pradesh, India.
| | - Vijay Choyal
- Department of Materials Engineering, Indian Institute of Science, Bengaluru, 560012, Karnataka, India
| | - Shailesh I Kundalwal
- Applied and Theoretical Mechanics (ATOM) Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Indore, Simrol, Indore, 453552, Madhya Pradesh, India.
| | - S K Sahu
- Applied and Theoretical Mechanics (ATOM) Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Indore, Simrol, Indore, 453552, Madhya Pradesh, India
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Boateng E, Thiruppathi AR, Hung CK, Chow D, Sridhar D, Chen A. Functionalization of Graphene-based Nanomaterials for Energy and Hydrogen Storage. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Mastalir Á, Molnár Á. A Novel Insight into the Ullmann Homocoupling Reactions Performed in Heterogeneous Catalytic Systems. Molecules 2023; 28:molecules28041769. [PMID: 36838755 PMCID: PMC9960315 DOI: 10.3390/molecules28041769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/10/2023] [Accepted: 02/11/2023] [Indexed: 02/16/2023] Open
Abstract
The Ullmann reaction has been reported to be the first cross-coupling reaction performed by using a transition metal catalyst. This reaction has been initially considered as the copper-catalyzed homocoupling of aryl halides, leading to the formation of symmetrical biaryl compounds via the generation of novel C-C bonds. Although this reaction has been extensively studied in recent decades and valuable results have been achieved, there are still considerable efforts focused on the development of novel catalytic systems, mild reaction conditions, and extended substrate scope. The mechanistic aspects of the Ullmann homocoupling reaction have also been investigated, as related to the introduction of new sustainable strategies and green procedures. The application of recyclable heterogeneous catalysts has been found to overcome most of the limitations associated with the harsh reaction conditions of the original Ullmann reaction. More recently, copper-based catalytic systems have also been replaced by palladium nanoparticles, ionic palladium species, gold nanoparticles, and palladium-gold bimetallic systems. In this review, current results reported on the Ullmann homocoupling reaction are discussed, with an emphasis on the development of novel catalytic systems, which can be efficiently used under heterogeneous conditions.
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10
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Ultra-small Pd Nanoparticles Supported on Porous g-C3N4 Nanosheet for Efficient Hydrogenation Reaction. Catal Letters 2022. [DOI: 10.1007/s10562-021-03812-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Rimza T, Saha S, Dhand C, Dwivedi N, Patel SS, Singh S, Kumar P. Carbon-Based Sorbents for Hydrogen Storage: Challenges and Sustainability at Operating Conditions for Renewable Energy. CHEMSUSCHEM 2022; 15:e202200281. [PMID: 35377969 DOI: 10.1002/cssc.202200281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 03/24/2022] [Indexed: 06/14/2023]
Abstract
It is estimated that all fossil fuels will be depleted by 2060 if we continue to use them at the present rate. Therefore, there is an unmet need for an alternative source of energy with high calorific value. In this regard, hydrogen is considered the best alternative renewable fuel that could be used in practical conditions. Accordingly, researchers are looking for an ideal hydrogen storage system under ambient conditions for feasible applications. In many respects, carbon-based sorbents have emerged as the best possible hydrogen storage media. These carbon-based sorbents are cost-effective, eco-friendly, and readily available. In this Review, the present status of carbon-based materials in promoting solid-state hydrogen storage technologies at the operating temperature and pressure was reported. Experimental studies have shown that some carbon-based materials such as mesoporous graphene and doped carbon nanotubes may have hydrogen storage uptake of 3-7 wt %, while some theoretical studies have predicted up to 13.79 wt % of hydrogen uptake at ambient conditions. Also, it was found that different methods used for carbon materials synthesis played a vital role in hydrogen storage performance. Eventually, this Review will be helpful to the scientific community for finding the competent material and methodology to investigate the existing hydrogen uptake issues at operating conditions.
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Affiliation(s)
- Tripti Rimza
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh, 462026, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Sumit Saha
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, Odisha, 751013, India
| | - Chetna Dhand
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh, 462026, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Neeraj Dwivedi
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh, 462026, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Shiv Singh Patel
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh, 462026, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Shiv Singh
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh, 462026, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Pradip Kumar
- CSIR-Advanced Materials and Processes Research Institute, Bhopal, Madhya Pradesh, 462026, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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Cho Y, Kang S, Wood BC, Cho ES. Heteroatom-Doped Graphenes as Actively Interacting 2D Encapsulation Media for Mg-Based Hydrogen Storage. ACS APPLIED MATERIALS & INTERFACES 2022; 14:20823-20834. [PMID: 35471930 DOI: 10.1021/acsami.1c23837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Nanoencapsulation using graphene derivatives enables the facile fabrication of two-dimensional (2D) nanocomposites with unique microstructures and has been generally applied to many fields of energy materials. Particularly, metal hydrides such as MgH2 encapsulated by graphene derivatives have emerged as a promising hybrid material for overcoming the disadvantageous properties of Mg-based hydrogen storage. Although the behavior of the graphene-Mg nanoencapsulation interface has been studied for many composite materials, the direct modification of graphene with nonmetal foreign elements for changing the interfacial behavior has been limitedly reported. In this regard, using B-doped graphene and N-doped graphene as nanoencapsulation media for tuning the interfacial behavior of graphene derivative-Mg nanoparticles, we present altered hydrogen storage kinetics of heteroatom-doped (B and N) graphene-Mg composites. The effect of heteroatom doping is studied in terms of bonding configurations and heteroatom doping concentrations. The enhancement in hydrogen uptake was observed for all of the heteroatom-doped graphene-Mg nanocomposites. On the other hand, a few samples exhibit significantly low activation energy at the early stage of desorption, which can be related to the facilitated nucleus formation. Density functional theory calculation indicates that B-doping and N-doping accelerate hydrogen absorption kinetics in different ways, aiding charge transfer and inducing surface deformation of Mg nanoparticles, respectively. Their effects can be augmented in the presence of structural defects on graphene, such as vacancies, pores, or graphene edges. These results demonstrate that hydrogen storage kinetics of Mg-based systems can be altered by utilizing heteroatom-doped graphene oxide derivatives as 2D nanoencapsulation media, suggesting that the addition of a nonmetal doping element can also be applied to Mg-based hydrogen storage by modifying the nanoencapsulation interface without forming Mg alloy phases.
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Affiliation(s)
- YongJun Cho
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - ShinYoung Kang
- Laboratory for Energy Applications for the Future (LEAF), Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, California 94550, United States
| | - Brandon C Wood
- Laboratory for Energy Applications for the Future (LEAF), Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, California 94550, United States
| | - Eun Seon Cho
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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From Iron to Copper: The Effect of Transition Metal Catalysts on the Hydrogen Storage Properties of Nanoconfined LiBH 4 in a Graphene-Rich N-Doped Matrix. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27092921. [PMID: 35566272 PMCID: PMC9103407 DOI: 10.3390/molecules27092921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 04/26/2022] [Accepted: 05/01/2022] [Indexed: 11/16/2022]
Abstract
Incipient wetness impregnation was employed to decorate two N-doped graphene-rich matrixes with iron, nickel, cobalt, and copper nanoparticles. The N-doped matrix was wetted with methanol solutions of the corresponding nitrates. After agitation and solvent evaporation, reduction at 800 °C over the carbon matrix promoted the formation of nanoparticles. The mass of the metal fraction was limited to 5 wt. % to determine if limited quantities of metallic nanoparticles catalyze the hydrogen capture/release of nanoconfined LiBH4. Isotherms of nitrogen adsorption afforded the textural characterization of the matrixes. Electronic microscopy displayed particles of definite size, evenly distributed on the matrixes, as confirmed by X-ray diffraction. The same techniques assessed the impact of LiBH4 50 vol. % impregnation on nanoparticle distribution and size. The hydrogen storage properties of these materials were evaluated by differential scanning calorimetry and two cycles of volumetric studies. X-ray diffraction allowed us to follow the evolution of the material after two cycles of hydrogen capture-release. We discuss if limited quantities of coordination metals can improve the hydrogen storage properties of nanoconfined LiBH4, and which critical parameters might restrain the synergies between nanoconfinement and the presence of metal catalysts.
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Alonso JA, López MJ. Palladium clusters, free and supported on surfaces, and their applications in hydrogen storage. Phys Chem Chem Phys 2022; 24:2729-2751. [PMID: 35077528 DOI: 10.1039/d1cp03524j] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Palladium is a late transition metal element in the 4d row of the periodic table. Palladium nanoparticles show efficient catalytic activity and selectivity in a number of chemical reactions. In this paper, we review the structural and electronic properties of palladium nanoclusters, both isolated and deposited on the surface of different substrates. Careful experiments and extensive calculations have been performed for small Pd clusters which provide ample information on their properties. Work on large Pd clusters is less abundant and more difficult to perform and interpret. Cluster deposition is a method to modify material surfaces for different applications, and we report the known results for the deposition of Pd clusters on the surfaces of a number of interesting substrates: carbonaceous substrates like graphene and some layered novel materials related to graphene, metal oxide substrates, silicon and silicon-related substrates and metallic alloy substrates. Emphasis is placed on revealing how the structural, electronic and magnetic properties change when the clusters are deposited on the substrate surfaces. Some examples of chemical reactions catalyzed by supported Pd clusters and nanoparticles are reported. An issue discussed in detail is the influence of Pd on the storage of hydrogen in porous materials. Experimental work shows that the amount of stored hydrogen increases when the absorbing material is doped with Pd atoms, clusters and nanoparticles, and a spillover mechanism from the metal particle to the substrate is usually accepted as the explanation. To shed light on this issue, a critical analysis based on density functional simulations of the mechanisms of hydrogen spillover in perfect and defective graphene doped with palladium clusters is presented.
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Affiliation(s)
- Julio A Alonso
- Departamento de Física Teórica, Atómica y Optica, Universidad de Valladolid, 47011, Valladolid, Spain.
| | - María J López
- Departamento de Física Teórica, Atómica y Optica, Universidad de Valladolid, 47011, Valladolid, Spain.
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Audevard J, Benyounes A, Castro Contreras R, Abou Oualid H, Kacimi M, Serp P. Multifunctional Catalytic Properties of Pd/CNT Catalysts for 4‐Nitrophenol Reduction. ChemCatChem 2022. [DOI: 10.1002/cctc.202101783] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jeremy Audevard
- JLCC-CNRS Université de Toulouse UPR 8241 CNRS, INPT 31030 Toulouse France
| | - Anas Benyounes
- JLCC-CNRS Université de Toulouse UPR 8241 CNRS, INPT 31030 Toulouse France
| | | | | | - Mohamed Kacimi
- Laboratory of Physical Chemistry of Materials Catalysis and Environment (URAC26) Department of Chemistry Faculty of Science University of Mohammed V 10106 Rabat Morocco
| | - Philippe Serp
- JLCC-CNRS Université de Toulouse UPR 8241 CNRS, INPT 31030 Toulouse France
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Kamathe V, Nagar R. Morphology-driven gas sensing by fabricated fractals: A review. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2021; 12:1187-1208. [PMID: 34858773 PMCID: PMC8593696 DOI: 10.3762/bjnano.12.88] [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: 06/12/2021] [Accepted: 10/22/2021] [Indexed: 06/13/2023]
Abstract
Fractals are intriguing structures that repeat themselves at various length scales. Interestingly, fractals can also be fabricated artificially in labs under controlled growth environments and be explored for various applications. Such fractals have a repeating unit that spans in length from nano- to millimeter range. Fractals thus can be regarded as connectors that structurally bridge the gap between the nano- and the macroscopic worlds and have a hybrid structure of pores and repeating units. This article presents a comprehensive review on inorganic fabricated fractals (fab-fracs) synthesized in labs and employed as gas sensors across materials, morphologies, and gas analytes. The focus is to investigate the morphology-driven gas response of these fab-fracs and identify key parameters of fractal geometry in influencing gas response. Fab-fracs with roughened microstructure, pore-network connectivity, and fractal dimension (D) less than 2 are projected to be possessing better gas sensing capabilities. Fab-fracs with these salient features will help in designing the commercial gas sensors with better performance.
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Affiliation(s)
- Vishal Kamathe
- Nanomaterials for Energy Applications Lab, Applied Science Department, Symbiosis Institute of Technology, Symbiosis International (Deemed University), Lavale, Pune-412115, Maharashtra, India
| | - Rupali Nagar
- Nanomaterials for Energy Applications Lab, Applied Science Department, Symbiosis Institute of Technology, Symbiosis International (Deemed University), Lavale, Pune-412115, Maharashtra, India
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Koh J, Choi E, Sakaki K, Kim D, Han SM, Kim S, Cho ES. Uncovering the encapsulation effect of reduced graphene oxide sheets on the hydrogen storage properties of palladium nanocubes. NANOSCALE 2021; 13:16942-16951. [PMID: 34635893 DOI: 10.1039/d1nr04335h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Decades of research on solute-induced phase transformation of metal hydride systems have shown the possibility to enhance hydrogen storage properties through novel material design such as nanoconfinement engineering. Nevertheless, the fundamentals of mechanical stress effect on confined Pd nanoparticles remain yet to be elucidated due to the difficulty in linking with hydrogen sorption thermodynamics. Here, a thermodynamic tuning of Pd nanocubes associated with hydrogen sorption as a result of encapsulation by reduced graphene oxide (rGO) layers is demonstrated. Pd nanocubes are constrained by rGO to such a degree that the chemical potential and the pressure hysteresis of the system during hydrogen sorption drastically change while showing a size dependence. A thorough thermodynamic analysis elucidates the role of constraints on hydrogen uptake and release; despite the nanoscale regime, the thermodynamic parameters (enthalpy and entropy) during phase transition considerably increase, a phenomenon not seen before in unconstrained Pd nanoparticle systems.
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Affiliation(s)
- Jinseok Koh
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.
| | - Eunho Choi
- Department of Nuclear Engineering, Hanyang University, Seoul 04763, Republic of Korea.
| | - Kouji Sakaki
- Energy Process Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
| | - Daeho Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Seung Min Han
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Sangtae Kim
- Department of Nuclear Engineering, Hanyang University, Seoul 04763, Republic of Korea.
| | - Eun Seon Cho
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.
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Krishnakumar R, James A, Swathi RS. Metal‐Decorated Crown Ether‐Embedded Graphene Nanomeshes for Enhanced Molecular Adsorption. ADVANCED THEORY AND SIMULATIONS 2021. [DOI: 10.1002/adts.202100202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Rohini Krishnakumar
- School of Chemistry Indian Institute of Science Education and Research Thiruvananthapuram (IISER TVM) Vithura Thiruvananthapuram 695551 India
| | - Anto James
- School of Chemistry Indian Institute of Science Education and Research Thiruvananthapuram (IISER TVM) Vithura Thiruvananthapuram 695551 India
| | - Rotti Srinivasamurthy Swathi
- School of Chemistry Indian Institute of Science Education and Research Thiruvananthapuram (IISER TVM) Vithura Thiruvananthapuram 695551 India
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Lee JA, Lee WJ, Lim J, Kim SO. N-Dopant-Mediated Growth of Metal Oxide Nanoparticles on Carbon Nanotubes. NANOMATERIALS 2021; 11:nano11081882. [PMID: 34443711 PMCID: PMC8400905 DOI: 10.3390/nano11081882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/19/2021] [Accepted: 07/19/2021] [Indexed: 11/16/2022]
Abstract
Metal oxide nanoparticles supported on heteroatom-doped graphitic surfaces have been pursued for several decades for a wide spectrum of applications. Despite extensive research on functional metal oxide nanoparticle/doped carbon nanomaterial hybrids, the role of the heteroatom dopant in the hybridization process of doped carbon nanomaterials has been overlooked. Here, the direct growth of MnOx and RuOx nanoparticles in nitrogen (N)-doped sites of carbon nanotubes (NCNTs) is presented. The quaternary nitrogen (NQ) sites of CNTs actively participate in the nucleation and growth of the metal nanoparticles. The evenly distributed NQ nucleation sites mediate the generation of uniformly dispersed <10 nm diameter MnOx and RuOx nanoparticles, directly decorated on NCNT surfaces. The electrochemical performance of the resultant hybridized materials was evaluated using cyclic voltammetry. This novel hybridization method using the dopant-mediated nucleation and growth of metal oxides suggests ways that heteroatom dopants can be utilized to optimize the structure, interface and corresponding properties of graphitic carbon-based hybrid materials.
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Affiliation(s)
- Jin Ah Lee
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Korea; (J.A.L.); (W.J.L.); (S.O.K.)
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Korea
- KAIST Institute for Nanocentury, KAIST, Daejeon 34141, Korea
| | - Won Jun Lee
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Korea; (J.A.L.); (W.J.L.); (S.O.K.)
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Korea
- KAIST Institute for Nanocentury, KAIST, Daejeon 34141, Korea
- Department of Fiber System Engineering, Dankook University, Yongin 16890, Korea
| | - Joonwon Lim
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Korea; (J.A.L.); (W.J.L.); (S.O.K.)
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Korea
- KAIST Institute for Nanocentury, KAIST, Daejeon 34141, Korea
- Department of Information Display, Kyung Hee University, Seoul 02447, Korea
- Correspondence:
| | - Sang Ouk Kim
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Korea; (J.A.L.); (W.J.L.); (S.O.K.)
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Korea
- KAIST Institute for Nanocentury, KAIST, Daejeon 34141, Korea
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20
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Zou Y, Cheng C, Guo Y, Ong AJ, Goei R, Li S, Yoong Tok AI. Atomic layer deposition of rhodium and palladium thin film using low-concentration ozone. RSC Adv 2021; 11:22773-22779. [PMID: 35480446 PMCID: PMC9034295 DOI: 10.1039/d1ra03942c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 06/21/2021] [Indexed: 11/21/2022] Open
Abstract
Rhodium (Rh) and palladium (Pd) thin films have been fabricated using an atomic layer deposition (ALD) process using Rh(acac)3 and Pd(hfac)2 as the respective precursors and using short-pulse low-concentration ozone as the co-reactant. This method of fabrication does away with the need for combustible reactants such as hydrogen or oxygen, either as a precursor or as an annealing agent. All previous studies using only ozone could not yield metallic films, and required post treatment using hydrogen or oxygen. In this work, it was discovered that the concentration level of ozone used in the ALD process was critical in determining whether the pure metal film was formed, and whether the metal film was oxidized. By controlling the ozone concentration under a critical limit, the fabrication of these noble metal films was successful. Rhodium thin films were deposited between 200 and 220 °C, whereas palladium thin films were deposited between 180 and 220 °C. A precisely controlled low ozone concentration of 1.22 g m−3 was applied to prevent the oxidation of the noble metallic film, and to ensure fast growth rates of 0.42 Å per cycle for Rh, and 0.22 Å per cycle for Pd. When low-concentration ozone was applied to react with ligand, no excess ozone was available to oxidize the metal products. The surfaces of deposited films obtained the RMS roughness values of 0.30 nm for Rh and 0.13 nm for Pd films. The resistivities of 18 nm Rh and 22 nm Pd thin films were 17 μΩ cm and 63 μΩ cm. Rh and Pd metallic thin films were fabricated by atomic layer deposition using Rh(acac)3 and Pd(hfac)2 precursors, and only low-concentration ozone as co-reactant.![]()
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Affiliation(s)
- Yiming Zou
- School of Materials Science and Engineering, Nanyang Technological University Singapore 639798 Singapore
| | - Chunyu Cheng
- School of Materials Science and Engineering, Nanyang Technological University Singapore 639798 Singapore
| | - Yuanyuan Guo
- School of Materials Science and Engineering, Nanyang Technological University Singapore 639798 Singapore
| | - Amanda Jiamin Ong
- School of Materials Science and Engineering, Nanyang Technological University Singapore 639798 Singapore
| | - Ronn Goei
- School of Materials Science and Engineering, Nanyang Technological University Singapore 639798 Singapore
| | - Shuzhou Li
- School of Materials Science and Engineering, Nanyang Technological University Singapore 639798 Singapore
| | - Alfred Iing Yoong Tok
- School of Materials Science and Engineering, Nanyang Technological University Singapore 639798 Singapore
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21
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Solventless Mechanochemical Fabrication of ZnO–MnCO3/N-Doped Graphene Nanocomposite: Efficacious and Recoverable Catalyst for Selective Aerobic Dehydrogenation of Alcohols under Alkali-Free Conditions. Catalysts 2021. [DOI: 10.3390/catal11070760] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Catalytic efficacy of metal-based catalysts can be significantly enhanced by doping graphene or its derivatives in the catalytic protocol. In continuation of previous work regarding the catalytic properties of highly-reduced graphene oxide (HRG), graphene-oxide (GO) doped mixed metal oxide-based nanocomposites, herein we report a simple, straightforward and solventless mechanochemical preparation of N-doped graphene (NDG)/mixed metal oxide-based nanocomposites of ZnO–MnCO3 (i.e., ZnO–MnCO3/(X%-NDG)), wherein N-doped graphene (NDG) is employed as a dopant. The nanocomposites were prepared by physical milling of separately fabricated NDG and ZnO–MnCO3 calcined at 300 °C through eco-friendly ball mill procedure. The as-obtained samples were characterized via X-ray diffraction (XRD), Thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FT-IR), Raman, Field emission scanning electron microscopy (FESEM), Energy-dispersive X-ray spectroscopy (EDX) and surface area analysis techniques. To explore the effectiveness of the obtained materials, liquid-phase dehydrogenation of benzyl alcohol (BOH) to benzaldehyde (BH) was chosen as a benchmark reaction using eco-friendly oxidant (O2) without adding any harmful surfactants or additives. During the systematic investigation of reaction, it was revealed that the ZnO–MnCO3/NDG catalyst exhibited very distinct specific-activity (80 mmol/h.g) with a 100% BOH conversion and <99% selectivity towards BH in a very short time. The mechanochemically synthesized NDG-based nanocomposite showed remarkable enhancement in the catalytic performance and increased surface area compared with the catalyst without graphene (i.e., ZnO–MnCO3). Under the optimum catalytic conditions, the catalyst successfully transformed various aromatic, heterocyclic, allylic, primary, secondary and aliphatic alcohols to their respective ketones and aldehydes with high selectively and convertibility without over-oxidation to acids. In addition, the ZnO–MnCO3/NDG was also recycled up to six times with no apparent loss in its efficacy.
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dos Santos TC, Mancera RC, Rocha MV, da Silva AF, Furtado IO, Barreto J, Stavale F, Archanjo BS, de M. Carneiro JW, Costa LT, Ronconi CM. CO2 and H2 adsorption on 3D nitrogen-doped porous graphene: Experimental and theoretical studies. J CO2 UTIL 2021. [DOI: 10.1016/j.jcou.2021.101517] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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DABCO Derived Nitrogen-Doped Carbon Nanotubes for Oxygen Reduction Reaction (ORR) and Removal of Hexavalent Chromium from Contaminated Water. MATERIALS 2021; 14:ma14112871. [PMID: 34071937 PMCID: PMC8199063 DOI: 10.3390/ma14112871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 05/24/2021] [Accepted: 05/24/2021] [Indexed: 12/02/2022]
Abstract
Though chemically-derived reduced graphene oxide (CDG) from graphite oxide (GO) precursors is a widely practiced procedure for the large-scale production of graphene, the quality and quantity of thus obtained CDG is dependent on the reduction strategy used. In this work, we report an all-solid-state, residue-free, microwave process for the reduction of graphene oxide and subsequent growth of carbon nanotube ‘separators’ from a single precursor, namely DABCO (1,4-diazabicyclo[2.2.2]octane). The utility of our newly developed technique in efficiently and effectively reducing graphene oxide and in growing nitrogen-doped carbon nanotubes via catalysts like palladium and iron into unique mesoporous, 3-D hierarchical carbon nanostructures is demonstrated. The applicability of the thus obtained palladium embedded in Pd@NCNT-rGO nanoarchitectures for the oxygen reduction reaction (ORR) is investigated. When carbon fiber (CF) was used as the substrate, three-dimensional Fe@NCNT-CF were obtained, whose capability as versatile adsorbents for hexavalent chromium ion removal from contaminated waters was also demonstrated.
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Emerging Technology for a Green, Sustainable Energy-Promising Materials for Hydrogen Storage, from Nanotubes to Graphene-A Review. MATERIALS 2021; 14:ma14102499. [PMID: 34066003 PMCID: PMC8151061 DOI: 10.3390/ma14102499] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 04/25/2021] [Accepted: 05/06/2021] [Indexed: 12/03/2022]
Abstract
The energetic and climate crises should pose a challenge for scientists in finding solutions in the field of renewable, green energy sources. Throughout more than two decades, the search for new opportunities in the energy industry made it possible to observe the potential use of hydrogen as an energy source. One of the greatest challenges faced by scientists for the sake of its use as an energy source is designing safe, usable, reliable, and effective forms of hydrogen storage. Moreover, the manner in which hydrogen is to be stored is closely dependent on the potential use of this source of green energy. In stationary use, the aim is to achieve high volumetric density of the container. However, from the point of view of mobile applications, an extremely important aspect is the storage of hydrogen, using lightweight tanks of relatively high density. That is why, a focus of scientists has been put on the use of carbon-based materials and graphene as a perspective solution in the field of H2 storage. This review focuses on the comparison of different methods for hydrogen storage, mainly based on the carbon-based materials and focuses on efficiently using graphene and its different forms to serve a purpose in the future H2-based economy.
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Kuniyil M, Shanmukha Kumar J, Adil SF, Assal ME, Shaik MR, Khan M, Al-Warthan A, Siddiqui MRH. Production of biodiesel from waste cooking oil using ZnCuO/N-doped graphene nanocomposite as an efficient heterogeneous catalyst. ARAB J CHEM 2021. [DOI: 10.1016/j.arabjc.2020.102982] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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Synopsis of Factors Affecting Hydrogen Storage in Biomass-Derived Activated Carbons. SUSTAINABILITY 2021. [DOI: 10.3390/su13041947] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Hydrogen (H2) is largely regarded as a potential cost-efficient clean fuel primarily due to its beneficial properties, such as its high energy content and sustainability. With the rising demand for H2 in the past decades and its favorable characteristics as an energy carrier, the escalating USA consumption of pure H2 can be projected to reach 63 million tons by 2050. Despite the tremendous potential of H2 generation and its widespread application, transportation and storage of H2 have remained the major challenges of a sustainable H2 economy. Various efforts have been undertaken by storing H2 in activated carbons, metal organic frameworks (MOFs), covalent organic frameworks (COFs), etc. Recently, the literature has been stressing the need to develop biomass-based activated carbons as an effective H2 storage material, as these are inexpensive adsorbents with tunable chemical, mechanical, and morphological properties. This article reviews the current research trends and perspectives on the role of various properties of biomass-based activated carbons on its H2 uptake capacity. The critical aspects of the governing factors of H2 storage, namely, the surface morphology (specific surface area, pore volume, and pore size distribution), surface functionality (heteroatom and functional groups), physical condition of H2 storage (temperature and pressure), and thermodynamic properties (heat of adsorption and desorption), are discussed. A comprehensive survey of the literature showed that an “ideal” biomass-based activated carbon sorbent with a micropore size typically below 10 Å, micropore volume greater than 1.5 cm3/g, and high surface area of 4000 m2/g or more may help in substantial gravimetric H2 uptake of >10 wt% at cryogenic conditions (−196 °C), as smaller pores benefit by stronger physisorption due to the high heat of adsorption.
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Chen X, Xue Z, Niu K, Liu X, Wei Lv, Zhang B, Li Z, Zeng H, Ren Y, Wu Y, Zhang Y. Li-fluorine codoped electrospun carbon nanofibers for enhanced hydrogen storage. RSC Adv 2021; 11:4053-4061. [PMID: 35424329 PMCID: PMC8694184 DOI: 10.1039/d0ra06500e] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 10/14/2020] [Indexed: 11/27/2022] Open
Abstract
Carbon materials have attracted increasing attention for hydrogen storage due to their great specific surface areas, low weights, and excellent mechanical properties. However, the performance of carbon materials for hydrogen absorption is hindered by weak physisorption. To improve the hydrogen absorption performance of carbon materials, nanoporous structures, doped heteroatoms, and decorated metal nanoparticles, among other strategies, are adopted to increase the specific surface area, number of hydrogen storage sites, and metal catalytic activity. Herein, Li–fluorine codoped porous carbon nanofibers (Li–F–PCNFs) were synthesized to enhance hydrogen storage performance. Especially, perfluorinated sulfonic acid (PFSA) polymers not only served as a fluorine precursor, but also inhibited the agglomeration of lithium nanoparticles during the carbonization process. Li–F–PCNFs showed an excellent hydrogen storage capacity, up to 2.4 wt% at 0 °C and 10 MPa, which is almost 24 times higher than that of the pure porous carbon nanofibers. It is noted that the high electronegativity gap between fluorine and lithium facilitates the electrons of the hydrogen molecules being attracted to the PCNFs, which enhanced the hydrogen adsorption capacity. In addition, Li–F–PCNFs may have huge potential for application in fuel cells. We developed a facile, yet general, approach for preparing Li–fluorine codoped porous carbon nanofiber (Li–F–PCNF) composites, which showed excellent hydrogen storage performance.![]()
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Affiliation(s)
- Xiaohong Chen
- Institute of Advanced Materials, North China Electric Power University Beijing China
| | - Zhiyong Xue
- Institute of Advanced Materials, North China Electric Power University Beijing China
| | - Kai Niu
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University No. 800 Dongchuan Rd., Minhang District Shanghai 200240 China
| | - Xundao Liu
- School of Materials Science and Engineering, University of Jinan Jinan 250022 China
| | - Wei Lv
- Institute of Advanced Materials, North China Electric Power University Beijing China
| | - Bao Zhang
- Institute of Advanced Materials, North China Electric Power University Beijing China
| | - Zhongyu Li
- Institute of Advanced Materials, North China Electric Power University Beijing China
| | - Hong Zeng
- Institute of Advanced Materials, North China Electric Power University Beijing China
| | - Yu Ren
- Institute of Advanced Materials, North China Electric Power University Beijing China
| | - Ying Wu
- Institute of Advanced Materials, North China Electric Power University Beijing China
| | - Yongming Zhang
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University No. 800 Dongchuan Rd., Minhang District Shanghai 200240 China
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29
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Wu W, Zhang W, Long Y, Qin J, Ma J. Different transfer hydrogenation pathways of halogenated nitrobenzenes catalyzed by Fe-, Co- or Ni-based species confined in nitrogen doped carbon. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.111226] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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30
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Mohmad G, Sarkar S, Biswas A, Roy K, Dey RS. Polymer‐Assisted Electrophoretic Synthesis of N‐Doped Graphene‐Polypyrrole Demonstrating Oxygen Reduction with Excellent Methanol Crossover Impact and Durability. Chemistry 2020; 26:12664-12673. [DOI: 10.1002/chem.202002526] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 07/01/2020] [Indexed: 11/09/2022]
Affiliation(s)
- Ghulam Mohmad
- Institute of Nano Science and Technology Sector 64, Mohali 160062 Punjab India
| | - Subhajit Sarkar
- Institute of Nano Science and Technology Sector 64, Mohali 160062 Punjab India
| | - Ashmita Biswas
- Institute of Nano Science and Technology Sector 64, Mohali 160062 Punjab India
| | - Kingshuk Roy
- Research Institute for Sustainable Energy (RISE) TCG Centres for Research and Education in Science and Technology (TCG CREST), Sector V Salt Lake Kolkata 700091 India
| | - Ramendra Sundar Dey
- Institute of Nano Science and Technology Sector 64, Mohali 160062 Punjab India
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Panigrahi P, Kumar A, Bae H, Lee H, Ahuja R, Hussain T. Capacity enhancement of polylithiated functionalized boron nitride nanotubes: an efficient hydrogen storage medium. Phys Chem Chem Phys 2020; 22:15675-15682. [PMID: 32618312 DOI: 10.1039/d0cp01237h] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
By using first principles density functional theory simulations, we report detailed geometries, electronic structures and hydrogen (H2) storage properties of boron nitride nanotubes (BNNTs) doped with selective polylithiated molecules (CLi2). We find that unsaturated bonding of Li-1s states with BNNT significantly enhances the system stability and hinders the Li-Li clustering effect, which can be detrimental for reversible H2 storage. The H2 adsorption mechanism is explained on the basis of polarization caused by the cationic Li+ of CLi2 molecules bonded with BNNT. The incident H2 molecules are adsorbed with BNNT-nCLi2 through electrostatic and van der Waals interactions. We find that with a maximum of 5.0% of CLi2 coverage on BNNT, an H2 gravimetric density of up to 4.41 wt% can be achieved with adsorption energies in the range of -0.33 eV per H2, which is suitable for ambient condition H2 storage applications.
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Affiliation(s)
- Puspamitra Panigrahi
- Centre for Clean Energy and Nano Convergence, Hindustan Institute of Technology and Science, Chennai 603103, Tamil Nadu, India.
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Jogender, Mandeep, Badhani B, Kakkar R. Adsorption of methyl isocyanate on M4 (M=Fe, Ni, and Cu) cluster-decorated graphene and vacancy graphene: a DFT-D2 study. Struct Chem 2020. [DOI: 10.1007/s11224-020-01552-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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A Comprehensive Review on Hydrogen Absorption Behaviour of Metal Alloys Prepared through Mechanical Alloying. METALS 2020. [DOI: 10.3390/met10050562] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Hydride-forming alloys are currently considered reliable and suitable hydrogen storage materials because of their relatively high volumetric densities, and reversible H2 absorption/desorption kinetics, with high storage capacity. Nonetheless, their practical use is obstructed by several factors, including deterioration and slow hydrogen absorption/desorption kinetics resulting from the surface chemical action of gas impurities. Lately, common strategies, such as spark plasma sintering, mechanical alloying, melt spinning, surface modification and alloying with other elements have been exploited, in order to overcome kinetic barriers. Through these techniques, improvements in hydriding kinetics has been achieved, however, it is still far from that required in practical application. In this review, we provide a critical overview on the effect of mechanical alloying of various metal hydrides (MHs), ranging from binary hydrides (CaH2, MgH2, etc) to ternary hydrides (examples being Ti-Mn-N and Ca-La-Mg-based systems), that are used in solid-state hydrogen storage, while we also deliver comparative study on how the aforementioned alloy preparation techniques affect H2 absorption/desorption kinetics of different MHs. Comparisons have been made on the resultant material phases attained by mechanical alloying with those of melt spinning and spark plasma sintering techniques. The reaction mechanism, surface modification techniques and hydrogen storage properties of these various MHs were discussed in detail. We also discussed the remaining challenges and proposed some suggestions to the emerging research of MHs. Based on the findings obtained in this review, the combination of two or more compatible techniques, e.g., synthesis of metal alloy materials through mechanical alloying followed by surface modification (metal deposition, metal-metal co-deposition or fluorination), may provide better hydriding kinetics.
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Saquib M, Bharadwaj A, Singh Kushwaha H, Halder A. Chloride Corrosion Resistant Nitrogen doped Reduced Graphene Oxide/Platinum Electrocatalyst for Hydrogen Evolution Reaction in an Acidic Medium. ChemistrySelect 2020. [DOI: 10.1002/slct.201901512] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mohammad Saquib
- School of Basic SciencesIndian Institute of Technology Mandi Mandi, Himachal Pradesh India Pin 175005
| | - Arpit Bharadwaj
- School of Basic SciencesIndian Institute of Technology Mandi Mandi, Himachal Pradesh India Pin 175005
| | - Himmat Singh Kushwaha
- School of EngineeringIndian Institute of Technology Mandi Mandi, Himachal Pradesh India, Pin- 175005
| | - Aditi Halder
- School of Basic SciencesIndian Institute of Technology Mandi Mandi, Himachal Pradesh India Pin 175005
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Ramachandran P, Lee CY, Doong RA, Oon CE, Kim Thanh NT, Lee HL. A titanium dioxide/nitrogen-doped graphene quantum dot nanocomposite to mitigate cytotoxicity: synthesis, characterisation, and cell viability evaluation. RSC Adv 2020; 10:21795-21805. [PMID: 35516620 PMCID: PMC9054499 DOI: 10.1039/d0ra02907f] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 06/01/2020] [Indexed: 12/25/2022] Open
Abstract
Titanium dioxide nanoparticles (TiO2 NPs) have attracted tremendous interest owing to their unique physicochemical properties. However, the cytotoxic effect of TiO2 NPs remains an obstacle for their wide-scale applications, particularly in drug delivery systems and cancer therapies. In this study, the more biocompatible nitrogen-doped graphene quantum dots (N-GQDs) were successfully incorporated onto the surface of the TiO2 NPs resulting in a N-GQDs/TiO2 nanocomposites (NCs). The effects of the nanocomposite on the viability of the breast cancer cell line (MDA-MB-231) was evaluated. The N-GQDs and N-GQDs/TiO2 NCs were synthesised using a one- and two-pot hydrothermal method, respectively while the TiO2 NPs were fabricated using microwave-assisted synthesis in the aqueous phase. The synthesised compounds were characterised using Fourier transform infrared (FTIR) spectroscopy, high-resolution transmission electron microscopy (HRTEM), field emission scanning electron microscopy (FESEM) and UV-visible spectrophotometry. The cell viability of the MDA-MB-231 cell line was determined using a CellTiter 96® AQueous One Solution Cell Proliferation (MTS) assay. The obtained results indicated that a monodispersed solution of N-GQDs with particle size 4.40 ± 1.5 nm emitted intense blue luminescence in aqueous media. The HRTEM images clearly showed that the TiO2 particles (11.46 ± 2.8 nm) are square shaped. Meanwhile, TiO2 particles were located on the 2D graphene nanosheet surface in N-GQDs/TiO2 NCs (9.16 ± 2.4 nm). N-GQDs and N-GQDs/TiO2 NCs were not toxic to the breast cancer cells at 0.1 mg mL−1 and below. At higher concentrations (0.5 and 1 mg mL−1), the nanocomposite was significantly less cytotoxic compared to the pristine TiO2. In conclusion, this nanocomposite with reduced cytotoxicity warrants further exploration as a new TiO2-based nanomaterial for biomedical applications, especially as an anti-cancer strategy. Cytotoxicity mitigation using titanium dioxide/nitrogen-doped graphene quantum dot nanocomposites.![]()
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Affiliation(s)
- Pravena Ramachandran
- Nanomaterials Research Group
- School of Chemical Sciences
- Universiti Sains Malaysia
- Malaysia
| | - Chong Yew Lee
- School of Pharmaceutical Sciences
- Universiti Sains Malaysia
- Malaysia
| | - Ruey-An Doong
- Institute of Analytical and Environmental Sciences
- National Tsing Hua University
- Hsinchu
- Taiwan
| | - Chern Ein Oon
- Institute for Research in Molecular Medicine (INFORMM)
- Universiti Sains Malaysia
- Malaysia
| | | | - Hooi Ling Lee
- Nanomaterials Research Group
- School of Chemical Sciences
- Universiti Sains Malaysia
- Malaysia
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Gerber IC, Serp P. A Theory/Experience Description of Support Effects in Carbon-Supported Catalysts. Chem Rev 2019; 120:1250-1349. [DOI: 10.1021/acs.chemrev.9b00209] [Citation(s) in RCA: 274] [Impact Index Per Article: 54.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Iann C. Gerber
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 avenue de Rangueil, F-31077 Toulouse, France
| | - Philippe Serp
- LCC-CNRS, Université de Toulouse, UPR 8241 CNRS, INPT, 31400 Toulouse, France
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H2 storage abilities of some novel Pd(II) complexes containing 2H[1,4]benzothiazin-3(4H)-one. INORG CHEM COMMUN 2019. [DOI: 10.1016/j.inoche.2019.05.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Yu M, Wang L, Liu J, Li H, Lang X, Zhao C, Hong Z, Wang W. Sponge Effect Boosting Oxygen Reduction Reaction at the Interfaces between Mullite SmMn 2O 5 and Nitrogen-Doped Reduced Graphene Oxide. ACS APPLIED MATERIALS & INTERFACES 2019; 11:17482-17490. [PMID: 31026140 DOI: 10.1021/acsami.9b04451] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Exploring the effect of interfacial structural properties on catalytic performance of hybrid materials is essential in rationally designing novel electrocatalysts with high stability and activity. Here, in situ growth of mullite SmMn2O5 on nitrogen-doped reduced graphene oxide (SMO@NrGO) is achieved for highly efficient oxygen reduction reaction (ORR). Combining X-ray photoelectron spectroscopy and density functional theory calculations, interfacial chemical interactions between Mn and substrates are verified. Interestingly, as revealed by charge density difference, the interfacial Mn-N(C) bonds display a sponge effect to store and compensate electrons to boost the ORR process. In addition, bidentate adsorption of oxygen intermediates instead of monodentate ones is observed in hybrid materials, which facilitates the interactions between intermediates and active sites. Experimentally, the hybrid catalyst SMO@NrGO exhibits a half-wave potential as high as 0.84 V, being comparable to benchmark Pt/C and higher than that of the pure SMO (0.68 V). The Zn-air battery assembled with SMO@NrGO shows a high discharge peak power density of 244 mW cm-2 and superior cycling stability against noble metals.
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Affiliation(s)
| | | | | | | | | | | | - Zhanglian Hong
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering , Zhejiang University , No. 38 Zheda Road , Hangzhou 310027 , China
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Sharavath V, Sarkar S, Ghosh S. One-pot hydrothermal synthesis of TiO2/graphene nanocomposite with simultaneous nitrogen-doping for energy storage application. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.09.056] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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41
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Hernández-Hernández A, Vallejo E, Martínez-Farías F, Pelayo JJ, Hernández-Hernández LA, Pescador-Rojas JA, Tamayo-Rivera L, Morales-Peñaloza A, López-Pérez PA, Cortes ER. Changes to the dissociation barrier of H 2 due to buckling induced by a chemisorbed hydrogen on a doped graphene surface. J Mol Model 2018; 24:244. [PMID: 30128714 DOI: 10.1007/s00894-018-3763-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Accepted: 07/24/2018] [Indexed: 11/27/2022]
Abstract
An effectiveway of enhancing hydrogen storage on adsorbent materials can be induced by the hydrogen spill-over mechanism, although to date there is no general consensus which satisfactorily explains the mechanism. In this work, a possible reaction path to explain hydrogen adsorption is shown. Density-functional calculations were used to study the dissociation of molecular hydrogen near to a stressed region, as a consequence of chemisorbed hydrogen at the graphene-nitrogen surface. We found that as a result of the buckling induced by the chemisorbed hydrogen, the dissociation barrier of molecular hydrogen diminished by 0.84 eV. The chemisorbed hydrogen is the final state in the spill-over mechanism on a graphene-nitrogen decorated with palladium clusters. This effect helps to create hydrogen nanoislands that may change the diffusion and detrapping of H. An electronic structure analysis suggests that these systems occasionally present metallic or semiconductor behavior. Graphical Abstract Hydrogen dissociation and adsorption process via buckling defect.
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Affiliation(s)
- A Hernández-Hernández
- Escuela Superior de Apan, Energetic Systems and Advanced Materials, Universidad Autónoma del Estado de Hidalgo, Carretera Apan-Calpulalpan Km. 8, Col. Chimalpa, C.P. 43920, Apan, Hidalgo, México
| | - E Vallejo
- Escuela Superior de Apan, Energetic Systems and Advanced Materials, Universidad Autónoma del Estado de Hidalgo, Carretera Apan-Calpulalpan Km. 8, Col. Chimalpa, C.P. 43920, Apan, Hidalgo, México
| | - F Martínez-Farías
- Escuela Superior de Apan, Energetic Systems and Advanced Materials, Universidad Autónoma del Estado de Hidalgo, Carretera Apan-Calpulalpan Km. 8, Col. Chimalpa, C.P. 43920, Apan, Hidalgo, México.
| | - J Jesus Pelayo
- Escuela Superior de Apan, Energetic Systems and Advanced Materials, Universidad Autónoma del Estado de Hidalgo, Carretera Apan-Calpulalpan Km. 8, Col. Chimalpa, C.P. 43920, Apan, Hidalgo, México
| | - L A Hernández-Hernández
- Escuela Superior de Apan, Energetic Systems and Advanced Materials, Universidad Autónoma del Estado de Hidalgo, Carretera Apan-Calpulalpan Km. 8, Col. Chimalpa, C.P. 43920, Apan, Hidalgo, México
| | - J A Pescador-Rojas
- Escuela Superior de Apan, Energetic Systems and Advanced Materials, Universidad Autónoma del Estado de Hidalgo, Carretera Apan-Calpulalpan Km. 8, Col. Chimalpa, C.P. 43920, Apan, Hidalgo, México
| | - L Tamayo-Rivera
- Escuela Superior de Apan, Energetic Systems and Advanced Materials, Universidad Autónoma del Estado de Hidalgo, Carretera Apan-Calpulalpan Km. 8, Col. Chimalpa, C.P. 43920, Apan, Hidalgo, México
| | - A Morales-Peñaloza
- Escuela Superior de Apan, Energetic Systems and Advanced Materials, Universidad Autónoma del Estado de Hidalgo, Carretera Apan-Calpulalpan Km. 8, Col. Chimalpa, C.P. 43920, Apan, Hidalgo, México
| | - P A López-Pérez
- Escuela Superior de Apan, Energetic Systems and Advanced Materials, Universidad Autónoma del Estado de Hidalgo, Carretera Apan-Calpulalpan Km. 8, Col. Chimalpa, C.P. 43920, Apan, Hidalgo, México
| | - E Rangel Cortes
- Escuela Superior de Apan, Energetic Systems and Advanced Materials, Universidad Autónoma del Estado de Hidalgo, Carretera Apan-Calpulalpan Km. 8, Col. Chimalpa, C.P. 43920, Apan, Hidalgo, México.
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Microporous carbons derived from melamine and isophthalaldehyde: One-pot condensation and activation in a molten salt medium for efficient gas adsorption. Sci Rep 2018; 8:6092. [PMID: 29666382 PMCID: PMC5904172 DOI: 10.1038/s41598-018-24308-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 03/21/2018] [Indexed: 11/26/2022] Open
Abstract
In the present work, mixture of melamine and isophthalaldehyde undergo simultaneous polymerization, carbonization, and in situ activation in the presence of molten salt media through a single all-in-one route to design microporous carbons with high specific surface areas (~3000 m2/g). The effect of the activation temperature and molten salts on the polymerization process and final texture of the carbon was explored. Carbon materials prepared at 700 °C, in the presence of KOH (referred as MIK-700), exhibited a narrower pore-size distribution ~1.05 nm than those prepared in the presence of the eutectic KOH-NaOH mixture (MIKN). Additionally, MIK-700 possesses an optimum micropore volume (1.33 cm3/g) along with a high nitrogen content (2.66 wt%), resulting in the excellent CO2 adsorption capacity of 9.7 mmol/g at 273 K and 1 bar. Similarly, the high specific area and highest total pore volume play an important role in H2 storage at 77 K, with 4.0 wt% uptake by MIKN-800 (specific surface area and pore volume of 2984 m2/g and 1.98 cm3/g, respectively.) Thus, the facile one-step solvent-free synthesis and activation strategy is an economically favorable avenue for designing microporous carbons as an efficient gas adsorbents.
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Meenakshi, Kumar S, Jeet K, Sharma H. Effect of dopants and defect in graphene nanoribbons on dehydrogenation of MXH4, where M=Na,Liand X=Al,B. COMPUT THEOR CHEM 2018. [DOI: 10.1016/j.comptc.2018.03.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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44
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Kumar R, da Silva ET, Singh RK, Savu R, Alaferdov AV, Fonseca LC, Carossi LC, Singh A, Khandka S, Kar KK, Alves OL, Kubota LT, Moshkalev SA. Microwave-assisted synthesis of palladium nanoparticles intercalated nitrogen doped reduced graphene oxide and their electrocatalytic activity for direct-ethanol fuel cells. J Colloid Interface Sci 2018; 515:160-171. [DOI: 10.1016/j.jcis.2018.01.028] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 12/27/2017] [Accepted: 01/06/2018] [Indexed: 01/25/2023]
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45
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Rajaura RS, Srivastava S, Sharma PK, Mathur S, Shrivastava R, Sharma S, Vijay Y. Structural and surface modification of carbon nanotubes for enhanced hydrogen storage density. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.nanoso.2018.01.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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46
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Chandran P, Ghosh A, Ramaprabhu S. High-performance Platinum-free oxygen reduction reaction and hydrogen oxidation reaction catalyst in polymer electrolyte membrane fuel cell. Sci Rep 2018; 8:3591. [PMID: 29483545 PMCID: PMC5827662 DOI: 10.1038/s41598-018-22001-9] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 02/08/2018] [Indexed: 11/22/2022] Open
Abstract
The integration of polymer electrolyte membrane fuel cell (PEMFC) stack into vehicles necessitates the replacement of high-priced platinum (Pt)-based electrocatalyst, which contributes to about 45% of the cost of the stack. The implementation of high-performance and durable Pt metal-free catalyst for both oxygen reduction reaction (ORR) and hydrogen oxidation reaction (HOR) could significantly enable large-scale commercialization of fuel cell–powered vehicles. Towards this goal, a simple, scalable, single-step synthesis method was adopted to develop palladium-cobalt alloy supported on nitrogen-doped reduced graphene oxide (Pd3Co/NG) nanocomposite. Rotating ring-disk electrode (RRDE) studies for the electrochemical activity towards ORR indicates that ORR proceeds via nearly four-electron mechanism. Besides, the mass activity of Pd3Co/NG shows an enhancement of 1.6 times compared to that of Pd/NG. The full fuel cell measurements were carried out using Pd3Co/NG at the anode, cathode in conjunction with Pt/C and simultaneously at both anode and cathode. A maximum power density of 68 mW/cm2 is accomplished from the simultaneous use of Pd3Co/NG as both anode and cathode electrocatalyst with individual loading of 0.5 mg/cm2 at 60 °C without any backpressure. To the best of our knowledge, the present study is the first of its kind of a fully non-Pt based PEM full cell.
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Affiliation(s)
- Priji Chandran
- Alternative Energy and Nanotechnology Laboratory (AENL), Nano-Functional Materials and Technology Centre (NFMTC), Department of Physics, Indian Institute of Technology Madras, Chennai, Tamil Nadu, 600036, India
| | - Arpita Ghosh
- Alternative Energy and Nanotechnology Laboratory (AENL), Nano-Functional Materials and Technology Centre (NFMTC), Department of Physics, Indian Institute of Technology Madras, Chennai, Tamil Nadu, 600036, India
| | - Sundara Ramaprabhu
- Alternative Energy and Nanotechnology Laboratory (AENL), Nano-Functional Materials and Technology Centre (NFMTC), Department of Physics, Indian Institute of Technology Madras, Chennai, Tamil Nadu, 600036, India.
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Routh P, Shin SH, Jung SM, Choi HJ, Jeon IY, Baek JB. Boron-nitrogen-phosphorous doped graphene nanoplatelets for enhanced electrocatalytic activity. Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2018.01.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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48
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Iakunkov A, Klechikov A, Sun J, Steenhaut T, Hermans S, Filinchuk Y, Talyzin A. Gravimetric tank method to evaluate material-enhanced hydrogen storage by physisorbing materials. Phys Chem Chem Phys 2018; 20:27983-27991. [DOI: 10.1039/c8cp05241g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Weighing of whole gas-filled tank is proposed as a simple and inexpensive method to evaluate hydrogen storage properties of materials relative to compressed gas.
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Affiliation(s)
| | | | - Jinhua Sun
- Department of Physics
- Umeå University
- S-90187
- Umeå
- Sweden
| | - Timothy Steenhaut
- Institute of Condensed Matter and Nanosciences
- Université Catholique de Louvain
- 1348 Louvain-la-Neuve
- Belgium
| | - Sophie Hermans
- Institute of Condensed Matter and Nanosciences
- Université Catholique de Louvain
- 1348 Louvain-la-Neuve
- Belgium
| | - Yaroslav Filinchuk
- Institute of Condensed Matter and Nanosciences
- Université Catholique de Louvain
- 1348 Louvain-la-Neuve
- Belgium
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Manadé M, Viñes F, Gil A, Illas F. On the H2 interactions with transition metal adatoms supported on graphene: a systematic density functional study. Phys Chem Chem Phys 2018; 20:3819-3830. [DOI: 10.1039/c7cp07995h] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The attachment of H2 to the full set of transition metal (TM) adatoms supported on graphene is studied by using density functional theory including dispersion, identifying physisorbed, Kubas, and dissociated states.
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Affiliation(s)
- Montserrat Manadé
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Francesc Viñes
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Adrià Gil
- Centro de Química e Bioquímica
- DQB
- Faculdade de Ciências
- Universidade de Lisboa
- Campo Grande
| | - Francesc Illas
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
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Li J, Liu G, Long X, Gao G, Wu J, Li F. Different active sites in a bifunctional Co@N-doped graphene shells based catalyst for the oxidative dehydrogenation and hydrogenation reactions. J Catal 2017. [DOI: 10.1016/j.jcat.2017.09.007] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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