Publications
364 results found
Herou S, Schlee P, Jorge AB, et al., 2018, Biomass-derived electrodes for flexible supercapacitors, CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY, Vol: 9, Pages: 18-24, ISSN: 2452-2236
Abouelamaiem DI, He G, Parkin I, et al., 2018, Synergistic relationship between the three-dimensional nanostructure and electrochemical performance in biocarbon supercapacitor electrode materials, SUSTAINABLE ENERGY & FUELS, Vol: 2, Pages: 772-785, ISSN: 2398-4902
Lu Y, Wang L, Preuss K, et al., 2017, Halloysite-derived nitrogen doped carbon electrocatalysts for anion exchange membrane fuel cells, JOURNAL OF POWER SOURCES, Vol: 372, Pages: 82-90, ISSN: 0378-7753
He G, Li J, Qi C, et al., 2017, Single Nucleotide Polymorphism Genotyping in Single-Molecule Electronic Circuits, ADVANCED SCIENCE, Vol: 4, ISSN: 2198-3844
Tang C, Titirici M-M, Zhang Q, 2017, A review of nanocarbons in energy electrocatalysis: Multifunctional substrates and highly active sites, JOURNAL OF ENERGY CHEMISTRY, Vol: 26, Pages: 1077-1093, ISSN: 2095-4956
Huber G, Argyropoulos D, Matharu A, et al., 2017, Bio-based materials: general discussion, FARADAY DISCUSSIONS, Vol: 202, Pages: 121-139, ISSN: 1359-6640
Aldous L, Argyropoulos D, Budarin V, et al., 2017, Feedstocks and analysis: general discussion, FARADAY DISCUSSIONS, Vol: 202, Pages: 497-519, ISSN: 1359-6640
Qiao M, Tang C, Tanase LC, et al., 2017, Oxygenophilic ionic liquids promote the oxygen reduction reaction in Pt-free carbon electrocatalysts, Materials Horizons, Vol: 4, Pages: 895-899, ISSN: 2051-6355
We propose a novel idea to improve the surface properties of carbon-based Pt-free electrocatalysts in Polymer Electrolyte Membranes (PEMs) and Alkaline Fuel Cells (AFCs). Our concept is based on the addition of oxygenophilic and hydrophobic ionic liquids (ILs) to form a thin passivating layer at the triple point between the electrocatalyst–electrolyte–gas interface where the Oxygen Reduction Reaction (ORR) takes place.
Preuss K, Tanase LC, Teodorescu CM, et al., 2017, Sustainable metal-free carbogels as oxygen reduction electrocatalysts, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 5, ISSN: 2050-7488
Reza MT, Mumme J, Titirici M-M, et al., 2017, Hydrothermal carbonization of digestate in presence of zeolite, 254th National Meeting and Exposition of the American-Chemical-Society (ACS) on Chemistry's Impact on the Global Economy, Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727
Chai G-L, Qiu K, Qiao M, et al., 2017, Active sites engineering leads to exceptional ORR and OER bifunctionality in P,N Co-doped graphene frameworks, Energy and Environmental Science, Vol: 10, Pages: 1186-1195, ISSN: 1754-5692
Bifunctional catalysts for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) are highly desirable for rechargeable metal–air batteries and regenerative fuel cells. However, the commercial oxygen electrocatalysts (mainly noble metal based) can only exhibit either ORR or OER activity and also suffer from inherent cost and stability issues. It remains challenging to achieve efficient ORR and OER bifunctionality on a single catalyst. Metal-free structures offer relatively large scope for this bifunctionality to be engineered within one catalyst, together with improved cost-effectiveness and durability. Herein, by closely coupled computational design and experimental development, highly effective bifunctionality was achieved in a phosphorus and nitrogen co-doped graphene framework (PNGF) – with both ORR and OER activities reaching the theoretical limits of metal-free catalysts, superior to their noble metal counterparts in both (bi)functionality and durability. In particular, with the identification of active P–N sites for OER and N-doped sites for ORR, we successfully intensified these sites by one-pot synthesis to tailor the PNGF. The resulting catalyst achieved an ORR potential of 0.845 V vs. RHE at 3 mA cm−2 and an OER potential of 1.55 V vs. RHE at 10 mA cm−2. Its combined ORR and OER overpotential of 705 mV is much lower than those previously reported for metal-free bifunctional catalysts.
Li Y, Lu Y, Zhao C, et al., 2017, Recent advances of electrode materials for low-cost sodium-ion batteries towards practical application for grid energy storage, ENERGY STORAGE MATERIALS, Vol: 7, Pages: 130-151, ISSN: 2405-8297
Marinovic A, Kiat LS, Dunn S, et al., 2017, Carbon-Nanodot Solar Cells from Renewable Precursors, CHEMSUSCHEM, Vol: 10, Pages: 1004-1013, ISSN: 1864-5631
Kumar KV, Preuss K, Titirici M-M, et al., 2017, Nanoporous Materials for the Onboard Storage of Natural Gas, CHEMICAL REVIEWS, Vol: 117, Pages: 1796-1825, ISSN: 0009-2665
Texter J, Zhao L, Xiao P-W, et al., 2017, Connecting carbon porosity with dispersibility and friability, CARBON, Vol: 112, Pages: 117-129, ISSN: 0008-6223
Kumar KV, Gadipelli S, Preuss K, et al., 2017, Salt Templating with Pore Padding: Hierarchical Pore Tailoring towards Functionalised Porous Carbons, CHEMSUSCHEM, Vol: 10, Pages: 199-209, ISSN: 1864-5631
He G, Qiao M, Li W, et al., 2017, S, N-Co-doped graphene-nickel cobalt sulfide aerogel: Improved energy storage and electrocatalytic performance, Advanced Science, Vol: 4, ISSN: 2198-3844
Metal sulfides are commonly used in energy storage and electrocatalysts due to their redox centers and active sites. Most literature reports show that their performance decreases significantly caused by oxidation in alkaline electrolyte during electrochemical testing. Herein, S and N co‐doped graphene‐based nickel cobalt sulfide aerogels are synthesized for use as rechargeable alkaline battery electrodes and oxygen reduction reaction (ORR) catalysts. Notably, this system shows improved cyclability due to the stabilization effect of the S and N co‐doped graphene aerogel (SNGA). This reduces the rate of oxidation and the decay of electronic conductivity of the metal sulfides materials in alkaline electrolyte, i.e., the capacity decrease of CoNi2S4/SNGA is 4.2% for 10 000 cycles in a three‐electrode test; the current retention of 88.6% for CoS/SNGA after 12 000 s current–time chronoamperometric response in the ORR test is higher than corresponding CoS nanoparticles and CoS/non‐doped graphene aerogels. Importantly, the results here confirm that the NiCoS ternary materials behave as an electrode for rechargeable alkaline batteries rather than supercapacitors electrodes in three‐electrode test as commonly described and accepted in the literature. Furthermore, formulas to evaluate the performance of hybrid battery devices are specified.
Dave Smith D, Titirici M-M, Briscoe J, 2017, Renewable Solar Cells, ChemViews
Gao H, Sapelkin AV, Titirici MM, et al., 2016, In Situ Synthesis of Fluorescent Carbon Dots/Polyelectrolyte Nanocomposite Microcapsules with Reduced Permeability and Ultrasound Sensitivity, ACS NANO, Vol: 10, Pages: 9608-9615, ISSN: 1936-0851
Rybarczyk MK, Peng H-J, Tang C, et al., 2016, Porous carbon derived from rice husks as sustainable bioresources: insights into the role of micro-/mesoporous hierarchy in hosting active species for lithium-sulphur batteries, GREEN CHEMISTRY, Vol: 18, Pages: 5169-5179, ISSN: 1463-9262
Li Y, Hu Y-S, Titirici M-M, et al., 2016, Hard Carbon Microtubes Made from Renewable Cotton as High-Performance Anode Material for Sodium-Ion Batteries, ADVANCED ENERGY MATERIALS, Vol: 6, ISSN: 1614-6832
Ferrero GA, Fuertes AB, Sevilla M, et al., 2016, Efficient metal-free N-doped mesoporous carbon catalysts for ORR by a template-free approach, CARBON, Vol: 106, Pages: 179-187, ISSN: 0008-6223
Kumar KV, Preuss K, Guo ZX, et al., 2016, Understanding the Hydrophilicity and Water Adsorption Behavior of Nanoporous Nitrogen-Doped Carbons, JOURNAL OF PHYSICAL CHEMISTRY C, Vol: 120, Pages: 18167-18179, ISSN: 1932-7447
Tang C, Wang H-F, Chen X, et al., 2016, Topological Defects in Metal-Free Nanocarbon for Oxygen Electrocatalysis, ADVANCED MATERIALS, Vol: 28, Pages: 6845-+, ISSN: 0935-9648
Tang C, Wang HF, Chen X, et al., 2016, Oxygen Electrocatalysis: Topological Defects in Metal-Free Nanocarbon for Oxygen Electrocatalysis (Adv. Mater. 32/2016), Advanced Materials, Vol: 28, Pages: 7030-7030, ISSN: 0935-9648
Wang L, Jia W, Liu X, et al., 2016, Sulphur-doped ordered mesoporous carbon with enhanced electrocatalytic activity for the oxygen reduction reaction, JOURNAL OF ENERGY CHEMISTRY, Vol: 25, Pages: 566-570, ISSN: 2095-4956
Ferrero GA, Preuss K, Marinovic A, et al., 2016, Fe-N-doped carbon capsules with outstanding electrochemical performance and stability for the oxygen reduction reaction in both acid and alkaline conditions, ACS Nano, Vol: 10, Pages: 5922-5932, ISSN: 1936-0851
High surface area N-doped mesoporous carbon capsules with iron traces exhibit outstanding electrocatalytic activity for the oxygen reduction reaction in both alkaline and acidic media. In alkaline conditions, they exhibit more positive onset (0.94 V vs RHE) and half-wave potentials (0.83 V vs RHE) than commercial Pt/C, while in acidic media the onset potential is comparable to that of commercial Pt/C with a peroxide yield lower than 10%. The Fe–N-doped carbon catalyst combines high catalytic activity with remarkable performance stability (3500 cycles between 0.6 and 1.0 V vs RHE), which stems from the fact that iron is coordinated to nitrogen. Additionally, the newly developed electrocatalyst is unaffected by the methanol crossover effect in both acid and basic media, contrary to commercial Pt/C. The excellent catalytic behavior of the Fe–N-doped carbon, even in the more relevant acid medium, is attributable to the combination of chemical functions (N-pyridinic, N-quaternary, and Fe–N coordination sites) and structural properties (large surface area, open mesoporous structure, and short diffusion paths), which guarantees a large number of highly active and fully accessible catalytic sites and rapid mass-transfer kinetics. Thus, this catalyst represents an important step forward toward replacing Pt catalysts with cheaper alternatives. In this regard, an alkaline anion exchange membrane fuel cell was assembled with Fe–N-doped mesoporous carbon capsules as the cathode catalyst to provide current and power densities matching those of a commercial Pt/C, which indicates the practical applicability of the Fe–N-carbon catalyst.
Laginhas C, Nabais JMV, Titirici MM, 2016, Activated carbons with high nitrogen content by a combination of hydrothermal carbonization with activation, MICROPOROUS AND MESOPOROUS MATERIALS, Vol: 226, Pages: 125-132, ISSN: 1387-1811
Flexer V, Donose BC, Lefebvre C, et al., 2016, Microcellular Electrode Material for Microbial Bioelectrochemical Systems Synthesized by Hydrothermal Carbonization of Biomass Derived Precursors, ACS SUSTAINABLE CHEMISTRY & ENGINEERING, Vol: 4, Pages: 2508-2516, ISSN: 2168-0485
Soorholtz M, Jones LC, Samuelis D, et al., 2016, Local Platinum Environments in a Solid Analogue of the Molecular Periana Catalyst, ACS CATALYSIS, Vol: 6, Pages: 2332-2340, ISSN: 2155-5435
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