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Ibrahim Saana A.

Ibrahim Saana A.
UL/Bernal Institute

New Energy Materials and Devices
Batteries @ Bernal Institute, University of Limerick

About

70
Publications
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5,480
Citations
Additional affiliations
January 2017 - October 2017
Wuhan University of Technology
Position
  • Researcher

Publications

Publications (70)
Article
Full-text available
Direct colloidal synthesis of multinary metal chalcogenide nanocrystals typically develops dynamically from the binary metal chalcogenide nanocrystals with the subsequent incorporation of additional metal cations from solution during the growth process. Metal seeding of binary and multinary chalcogenides is also established, although the seed is so...
Article
Full-text available
Silicon nanowires (Si NWs) have great promise as an anode material for lithium-ion batteries (LIBs) due to their very high specific capacity. Achieving adequate mass loadings for binder–free Si NWs have been restricted by low surface area, mechanically unstable and poorly conductive current collectors (CC), as well as complicated and expensive fabr...
Article
Transition metal selenide catalysts have been identified as suitable materials for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) as a result of their high electrical conductivity, large surface area, and tunable electronic structure to generate clean hydrogen through electrocatalytic water splitting. In this work, we report...
Chapter
Energy is essential and affects all aspects of our society, including the economy and modern living. However, the unparalleled rise in the global population, technological advancements, and changes in the scope of energy resources are all affecting the present energy landscape. With the increasing demands for energy and over-consumption of fossil e...
Article
A few-layered MoS2 successfully grown on the nitrogen-doped carbon (NC) derived from zeolitic imidazolate framework (ZIF-8) via the hydrothermal method. A small portions of the obtained MoS2/NC composite blended with Poly (3, 4-ethylenedioxythiophene poly styrene sulfonic acid)PEDOT: PSS(as a conductive binder and utlized as counter electrode (CE)...
Article
Full-text available
Potassium-ion batteries (PIBs) have attracted increasing interest as promising alternatives to lithium-ion batteries (LIBs) for application in large-scale electrical energy storage systems (EESSs) owing to a wide earth-abundance, potential price advantages, and low standard redox potential of potassium. Developmental materials for use in PIBs that...
Article
A scalable and cost‐effective process is used to electroplate metallic Zn seeds on stainless steel substrates. Si and Ge nanowires (NWs) are subsequently grown by placing the electroplated substrates in the solution phase of a refluxing organic solvent at temperatures >430 °C and injecting the respective liquid precursors. The native oxide layer fo...
Article
Here we report the formation of three distinct Sn-based active materials for Li-ion battery anodes, formed from the same metal−organic material (MOM) precursor sql-1-Cu-SNIFSIX. The materials were obtained under three different anneal conditions in air, Ar, and a Se-rich atmosphere, leading to the selective formation of SnO2/CuO/C (oxide), Cu6Sn5/C...
Article
Full-text available
Hydrogen, a renewable and outstanding energy carrier with zero carbon dioxide emission, is regarded as the best alternative to fossil fuels. The most preferred route to large-scale production of hydrogen is by water electrolysis from the intermittent sources (e.g. wind, solar, hydro and tidal energy, etc.). However, the efficiency of water electrol...
Article
Full-text available
Efficient multifunctional electrocatalyst toward hydrogen evolution reaction (HER), hydrogen oxidation reaction (HOR) and oxygen reduction reaction (ORR) is highly desirable for water splitting, fuel cells and metal-air batteries. Herein, we report an advanced platinum phosphide (PtP2) material with only 3.5 wt% Pt loading embedded in phosphorus an...
Article
Full-text available
Developing highly efficient and stable electrocatalysts plays an important role in energy-related electrocatalysis fields. Transition-metal phosphides (TMPs) possess a series of advantages, such as high conductivity, earth-abundance reserves, and good physicochemical properties, therefore arousing wide attention. In this review, we first discuss th...
Article
A solution-based synthesis of well-ordered Cu-rich silicide nanoarchitectures, consisting of a pair of layered cups and stems (ρ-Cu15Si4), is demonstrated. The as-grown ρ-Cu15Si4 typically exhibits distinct interconnected 1D stems consisting of a stack of nanorods (∼300 nm in length) terminated with concave hexagonal 3D cups that evolve through a s...
Article
Full-text available
Silicon nanowires (Si NWs) have been identified as an excellent candidate material for the replacement of graphite in anodes, allowing for a significant boost in the capacity of lithium‐ion batteries (LIBs). Herein, high‐density Si NWs are grown on a novel 3D interconnected network of binary‐phase Cu‐silicide nanofoam (3D Cux Siy NF) substrate. The...
Article
Although carbon supported platinum (Pt/C) is still regarded as the most active electrocatalyst for hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR), its applications in metal–air batteries as a cathode catalyst or for oxygen generation via water splitting electrolysis as an anode catalyst is mainly constrained by the insufficie...
Article
Herein, textured Cu foil is presented as an attractive current collector substrate for directly grown Ge nanowire (NW) anodes. Compared to planar stainless steel (SS) current collectors, textured Cu led to an increase in achievable mass loading, removal of the requirement for a catalyst deposition step, improved adhesion of the active material and...
Article
Highly efficient, stable and cost-efficient electrocatalysts for hydrogen generation via water splitting become an increasing demand for future energy systems. Hitherto, P-rich noble metal polyphosphides which can decrease noble metal (Such as Rh, Pd, Ir) dosage is important to probe potential high-performance HER electrocatalysts. Nevertheless, th...
Article
The development of a stable, efficient and economic catalyst for hydrogen evolution reaction (HER) of water splitting is one of the most hopeful approaches to confront the environmental and energy crisis. A two-step method is employed to obtain metal clusters (Ru, Pt, Pd etc.) combining single cobalt atoms anchored on nitrogen-doped carbon (Ru/Pt/P...
Article
By direct carbonization of ZIF-8 nanopowder in an inert atmosphere, ZnO-nitrogen doped carbon (ZnO-NC) materials have been prepared and added with different contents to polystyrene sulfonate-doped poly (3, 4-ethylenedioxythiophene) (PEDOT: PSS) and employed as an efficient catalyst in dye-sensitized solar cells (DSSCs). The electrochemical analysis...
Article
Defect engineering is pivotal to the construction of high‐performance carbon nanomaterials toward many energy conversion and storage devices. In this work, theoretical calculations reveal that intrinsic pentagons in the basal plane can contribute to the local electronic redistribution and the contraction of bandgap, making the carbon matrix possess...
Article
Finding a non-noble metal (NNM) electrocatayst with comparative hydrogen evolution reaction (HER) activity in a broad pH range is essential but challenging. Here, we report a unique shrunken hollow spherical shell with Mo2N and Mo2C dual active phases encapsulated by nitrogen-doped carbon (Mo-N/C@N-C). As a NNM electrocatalyst, it shows high HER ac...
Article
Abstract ABSTRACT: ZIF-8 polystyrenesulfonate-doped poly (3, 4-ethylenedioxythiophene) ZIF-8/PEDOT: PSS is prepared and used as the alternative counter electrode (CE) for dye-sensitized solar cells (DSSCs) based on I^-/I_3^- and Co^(2+)/Co^(3+) redox mediators. It is found that incorporation of ZIF-8 in PEDOT: PSS results in boosting the catalytic...
Article
Yolk-Shell m-SiO2@ Nitrogen doped carbon (NC) has been synthesized by carbonization of m-SiO2@ZIF-8 and dispersed in polystyrenesulfonate-doped poly (3, 4-ethylenedioxythiophene) (PEDOT: PSS) to prepare yolk-shell m-SiO2@NC-PEDOT: PSS composite as a counter electrode (CE) for dye-sensitized solar cells (DSSCs). The electrochemical studies confirmed...
Article
In this study, we choose an efficient strategy to replace conventional oxygen evolution reaction with thermodynamically more readily oxidizable species (eg. small molecules). For example, hydrazine/ethanol/glycol/urea can be easily oxidized than that of oxygen evolution reaction, whereas the lack of low-cost and efficient small molecules oxidation...
Article
Developing high activity graphene-based materials for oxygen reduction reaction (ORR) catalysts remains a key issue for potential applications in fuel cells. According to the DFT calculation results, the distorted niobium-doped grpahene (Nb-G) can process the high oxygen adsorption energy (ΔE) on Nb-G that improves the O2 coverage on surfaces of ca...
Article
Activating both inert basal plane and edge sites of molybdenum-disulphide (MoS2 ) is significant step yet challenging in boosting their performance for hydrogen evolution reaction (HER). In this study, the density functional theory calculation results figure out that the incorporation of MoO3 fragments makes resultant O-Mo-S framework a slight out-...
Article
A hexapod PtRuCu nanocrystalline alloy material is successfully fabricated by a facile approach based on Stranski-Krastanov growth and galvanic replacement and used as an efficient catalyst for direct methanol fuel cells (DFMCs). Due to a synergetic effect of metallic elements in the methanol oxidation, the activity and durability of the prepared P...
Article
Carbon black-silicon nitride (CB-Si3N4) nanocomposite is prepared as cost-effective counter electrode (CE) for dye-sensitized solar cells (DSSCs). The CB-Si3N4 nanocomposite is coated on FTO substrate via screen printing method. The results demonstrate that when the thickness is fixed at 4.7 µm the CB-Si3N4 composite CE exhibit lower charge transfe...
Article
Highly active and stable Pt-free electrocatalysts for hydrogen production via water splitting are highly demanded for future energy systems. We, herein, report a novel hydrogen evolution reaction (HER) catalyst consisting of rhodium phosphide (Rh2P) nanoparticles as core and N−doped carbon (NC) as shell (Rh2P@NC). In a wide pH range, our catalyst n...
Article
A balanced design of cheaper, durable, and highly active electrocatalysts for large scale and sustainable hydrogen production is crucial for the emerging hydrogen economy. Herein, a scalable method is implemented to design a very active heteroatom cofunctionalized carbon nanorods with bifunctional electrocatalysis via structural transformation of t...
Article
Pt-based electrocatalysts are by far the most effective for hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR), but they still suffer high cost and insufficient overall performance. Improving Pt utilization via alloying or by forming core@shell structures is important for enhancing Pt activity and overall electrocatalytic perform...
Article
Carbon materials, with controllable structure, derived from metal-organic frameworks (MOFs) have been emerged as a new class of electrocatalysts in renewable energy devices. However, efficient conversion of MOF to small diameter doped carbon nanotubes in inert gases at high temperatures (> 600 °C) remains a significant challenge. In this study, we...
Article
Full-text available
Designing a highly active electrocatalyst with optimal stability at low cost is must and nonnegotiable if large-scale implementations of fuel cells are to be fully realized. Zeolitic-imidazolate frameworks (ZIFs) offer rich platforms to design multifunctional materials due to their flexibility and ultrahigh surface area. Herein, an advanced Co-Nx/C...
Article
Full-text available
Here first a 2D dual-metal (Co/Zn) and leaf-like zeolitic imidazolate framework (ZIF-L)-pyrolysis approach is reported for the low-cost and facile preparation of Co nanoparticles encapsulated into nitrogen-doped carbon nanotubes (Co-N-CNTs). Importantly, the reasonable Co/Zn molar ratio in the ZIF-L is the key to the emergence of the encapsulated m...
Article
Currently, the multicomponent Pt-based alloy as promising electrocatalyst has been applied to improve the catalysis and lower the usage of noble metal Pt. Herein, we report on a Te nanowire (NW) derived ternary TePtFe nanotube (NT) electrocatalyst prepared by the Kirkendall effect. The formed TePtFe NT consisting of small single crystals nanopartic...
Article
Transition metal phosphides (TMPs) are considered to be superb catalysts for water splitting. In this work, we introduce an efficient strategy to fabricate dicobalt phosphide (Co2P) quantum dots embedded in N, P dual-doped carbon (Co2P@NPC) on carbon cloth (Co2P@NPC/CC) by in situ carbonization of cobalt ion induced phytic acid (PA) and polyaniline...
Article
Interface engineering has been demonstrated to be effective in promoting hydrogen evolution reaction (HER) in an alkaline solution. Herein, we report that the HER activity of a NiS2 nanoarray on a titanium mesh (NiS2/TM) in alkaline media is greatly boosted by the electrodeposition of Ni(OH)2 onto NiS2 [Ni(OH)2-NiS2/TM]. Ni(OH)2-NiS2/TM only needs...
Article
Replacement of noble-metal platinum catalysts with cheaper, operationally stable, and highly efficient electrocatalysts holds huge potentials for large-scale implementation of clean energy devices. Metal-organic frameworks (MOFs) and metal dichalcogenides (MDs) offer rich platforms for design of highly active electrocatalysts owing to their flexibi...
Article
A considerable amount of intensive research has been made toward efficient energy storage, particularly rechargeable lithium-ion batteries (LIBs). However, there are still huge limitations to the application of the state-of-the-art LIBs including inadequate durability, safety concerns and high costs which cannot meet the ever-growing demand for por...
Article
Hitherto, WP has been used as hydrogen evolution reaction (HER) catalyst. However, its activity and complexity of nanostructure synthesis greatly limit applications in hydrogen production. Therefore, in this work, the coral-like WP nanorod arrays propagated on W foils (C-WP/W) are synthesized through an in situ oxidation and phosphorization route....
Article
Transition metal phosphides (TMPs) have been identified as promising non-precious metal electrocatalyst for hydrogen evolution reaction (HER) and other energy conversion reactions. Herein, we reported a general strategy for synthesis of a series of TMPs (Fe2P, FeP, Co2P, CoP, Ni2P and Ni12P5) nanoparticles (NPs) with different metal-phases embedded...
Article
Novel three dimensional (3D) porous carbon nanosheets with few layers are successfully prepared using intrinsically porous cellulose as carbon matrix only by means of calcination and KOH activation. Further, the N-doped 3D carbon nanosheets show high density of pyridinic N and extremely high specific surface area (1756 m2 g-1). As oxygen reduction...
Article
Designing a non-noble-metal catalyst with high efficiency toward oxygen evolution reactions (OER) is critical for renewable energy storage and conversion devices (eg., water-splitting and metal-air batteries). In the current study, a flexible electrode of nickel diphosphide nanosheet arrays on carbon cloth (NiP2/CC) is synthesized through phosphida...
Article
Non-precious metal (NPM) catalysts are considered as the most promising candidate to replace Pt-based electrocatalysts for oxygen reduction reaction (ORR). However, in comparison with the commercial Pt catalyst, the development of high efficiency and low cost NPM catalysts for ORR still remains a big challenge. Here, we report a simple but efficien...
Article
Applications of highly-efficient and durable non-precious metal electrocatalysts for hydrogen evolution reaction (HER) have a great potential to relieve the energy crisis. Here, we demonstrate a green method for fabrication of a number of transition metal phosphides (TMPs) by pyrolyzing melamine and self-assembled phytic acid (PA) cross-linked meta...
Article
Here, we first present a subtle thermal-chlorination strategy for a universal transformation of abundant 2D metal carbides (MxCy, e.g. Cr3C2, Mo2C, NbC and VC) to 2D M-self-doped graphene (MG). The as-obtained MG endows a transparent sheet architecture of one to four atomic layers. Simultaneously, MG with different M amount is synthesized by tuning...
Article
Full-text available
In this work, we propose a one-step process to realize the in-situ evolution of molybdenum carbide (Mo2C) nanoflakes into ordered mesoporous carbon with few-layered graphene walls (OMG) by chloridization and self-organization, and simultaneously the Cl-doping of OMG (OMG-Cl) by modulating chloridization and annealing processes is fulfilled. Benefit...
Article
Searching for a new material to build the next-generation rechargeable lithium-ion batteries (LIBs) with high electrochemical performance is urgently required. Owing to the low-cost, non-toxicity, and high-safety, the family of manganese oxide including the Na-Mn-O system is regarded as one of the most promising electrode materials for LIBs. Herein...
Article
Mo2C quantum dots (averagely 2 nm) embedded N-doped graphitic carbon layers (Mo2C QDs/NGCLs) is prepared through a simple, green and scalable solid-state reaction. This material exhibits remarkable hydrogen evolution reaction (HER) catalytic activity and durability at all pH values owing to the synergistic effect between Mo2C QDs and NGCLs.
Article
3D graphene-based materials offer immense potentials to overcome the challenges related to the functionality, performance, cost, and stability of fuel cell electrocatalysts. Herein, a nitrogen (N) and sulfur (S) dual-doped 3D porous graphene catalyst is synthesized via a single-row pyrolysis using biomass as solitary source for both N and S, and a...
Article
Rationally design and synthesis of highly-efficient and stable non-noble metal electrocatalysts are critical for the hydrogen evolution reaction (HER) associated with some renewable energy conversion system. Herein, we report on a one-step facile synthesis of ultrasmall tungsten phosphide nanoparticles (WP NPs) embedded within nitrogen-doped carbon...
Article
There is a crucial demand for cost-effective hydrogen evolution reaction (HER) catalysts towards future renewable energy systems, and the development of such catalysts operating under all pH conditions still remains a challenging task. In this work, a one-step facile approach to synthesizing nitrogen-doped carbon encapsulating molybdenum phosphide...
Article
Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) have been considered as a key step in energy conversion processes. Here, a novel and simple Mg(OH)2 nanocasting method is adopted to fabricate Co and N co-doped porous graphene-like carbon nanosheets (Co@N-PGCS) by using chitosan as both carbon and N sources. The as-obtained Co@N-P...
Article
Identifying non-precious metal electrocatalysts for the hydrogen evolution reaction (HER) with high efficiency and stability is a considerable challenge for the hydrogen based energy industry. We report the preparation of WP2 nanoparticles supported on W foil (WP2 NPs/W) through phosphidation of the corresponding WO3 NPs/W precursor. This hydrogen...
Article
Developing efficient non-precious metal hydrogen evolution reaction (HER) electrocatalysts is a great challenge for sustainable hydrogen production from water. In this communication, for the first time, semimetallic MoP2 nanoparticle films on a metal Mo plate (MoP2 NPs/Mo) are fabricated through a facile two-step strategy. When used as a binder-fre...
Article
Porous nitrogen-doped graphene with very high surface area (~1105 m2g-1) is synthesized by a novel strategy using intrinsically porous biomass (soybean shells) as a carbon and nitrogen source via the calcination and KOH activation. To redouble the oxygen reduction reaction (ORR) activity by tuning the doped-nitrogen content and type, ammonia (NH3)...
Article
Improving the long term stability of metal catalyst is crucial to develop polymer electrolyte fuel cells (PEFCs). In this work, we first report an inorganic (TiO2)-organic (perflurosulfonic acid, PFSA) co-stabilized Pt catalyst supported on graphene nanosheets (GNS) (Pt-PFSA-TiO2/GNS). Herein, TiO2, as a robust wall, impedes the collision between t...
Article
(1-x)Li2FeSiO4•xLiFeBO3/C (x = 0, 0.02, 0.05, 0.08, 0.12, and 1.00) hetero-grains are successfully synthesized via an in-situ citric acid-based sol−gel method and evaluated as cathode materials for lithium ion batteries. As a result, 0.92 Li2FeSiO4•0.08LiFeBO3/C delivers an optimum discharge capacity of 251 mAh g−1 which corresponds to nearly 1.51...
Article
A novel nitrogen (N)-doped carbon catalyst has been prepared using a simple but effective method by pyrolyzing polyvinylpyrrolidone (PVP) as the precursor and urea as a promoter. The physicochemical measurements results show that the sample upon adding urea not only has a porous structure with high surface area, but possesses more active N content...
Article
Full-text available
Polysulfones (udel) was chemically functionalized by bonded functional groups to the main chain through chemical reaction and investigated for use as protonconducting fuel-cell membranes. The resulting ionomers were cast into membranes and properties such as thermal stability, ion-exchange capacity, proton conductivity and water sorption were evalu...
Article
Efficient membrane proton conductivity at elevated temperatures (>100 °C) and reduced humidification conditions is a critical issue hindering fuel cell commercialization. Herein, proton conducting materials consisting of high surface area acid catalyzed mesoporous silica functionalized with sulfonated dimethylphenethylchlorosilane was investigated...
Chapter
Full-text available
Polymer electrolyte membrane fuel cells (PEMFCs) operating at elevated temperature have attracted considerable attention in recent years because they could benefit from enhanced tolerance to impurity of the fuel gas, improved water and heat management, and increased reaction rates at both cathode and anode compared with PEMFCs operating below 80oC....

Questions

Questions (4)
Question
I see in many papers that the Tafel slope of commercial Pt/C for HER is about 30 mV/dec. in 0.5M H2SO4 media, which is quite consistent. However, in 1.0M KOH media, the Tafel slope seems to vary considerable and is between 30 and 65 mV/dev.
For example: 31.8 is reported by Zhang J, et al. Angew. Chem. Int. Ed. 2016, 55, 6702 –6707: http://onlinelibrary.wiley.com/doi/10.1002/ange.201602237/full ) and (51 is reported by Tan Y, et al. Energy Environ. Sci., 2016, 9, 2257-2261 http://pubs.rsc.org/-/content/articlehtml/2016/ee/c6ee01109h ). Could anyone kindly provide any information in this regard? Thanks
Question
I see in many papers that the Tafel slope of commercial Pt/C for HER is about 30 mV/dec. in 0.5M H2SO4 media, which is quite consistent. However, in 1.0M KOH media, the Tafel slope seems to vary considerable and is between 30 and 65 mV/dev.
For example: 31.8 is reported by Zhang J, et al. Angew. Chem. Int. Ed. 2016, 55, 6702 –6707: http://onlinelibrary.wiley.com/doi/10.1002/ange.201602237/full ) and (51 is reported by Tan Y, et al. Energy Environ. Sci., 2016, 9, 2257-2261 http://pubs.rsc.org/-/content/articlehtml/2016/ee/c6ee01109h ). Could anyone kindly provide any information in this regard? Thanks
Question
Hi everyone, If an amorphous carbon material is prepared from MOFs at say 800 degrees, what solvent is best to re-dissolve the obtained carbon ? MOFs = metal organic frameworks

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