Parcourir par sujet "Hydrogen"

Active sites and mechanism on nitrogen-doped carbon catalyst for hydrogen evolution reaction

Long G.-F., Wan K., Liu M.-Y., Liang Z.-X., Piao J.-H., Tsiakaras P. (2017)

The nature of active sites and mechanism of hydrogen evolution reaction (HER) on the nitrogen-doped carbon catalyst is extensively investigated, by combining physicochemical and electrochemical methods. Two carbon catalysts, ...

The architecture of hydrogen and sulfur σ-hole interactions explain differences in the inhibitory potency of C-β-D-glucopyranosyl thiazoles, imidazoles and an N-β-D glucopyranosyl tetrazole for human liver glycogen phosphorylase and offer new insights to structure-based design

Kyriakis E., Karra A.G., Papaioannou O., Solovou T., Skamnaki V.T., Liggri P.G.V., Zographos S.E., Szennyes E., Bokor É., Kun S., Psarra A.-M.G., Somsák L., Leonidas D.D. (2020)

C-Glucopyranosyl imidazoles, thiazoles, and an N-glucopyranosyl tetrazole were assessed in vitro and ex vivo for their inhibitory efficiency against isoforms of glycogen phosphorylase (GP; a validated pharmacological target ...

Bimetallic Ni‒Co phosphide nanosheets self-supported on nickel foam as high-performance electrocatalyst for hydrogen evolution reaction

Yu C., Xu F., Luo L., Abbo H.S., Titinchi S.J.J., Shen P.K., Tsiakaras P., Yin S. (2019)

In this work, bimetallic nickel-cobalt phosphide (Ni-Co-P/NF) self-supported on nickel foam (NF) is synthesized for hydrogen evolution reaction (HER). A two-step method of electrodeposition with subsequently low-temperature ...

Bioethanol steam reforming over Pt and Ag in an electrochemical CSTR reactor

Poulianitis, C.; Eliopoulos, S.; Giannopoulos, C.; Song, S.; Tsiakaras, P. (2005)

The environmental problems caused by the intensive use of fossil fuels-as well as their limited availability- are increasingly demanding a more rational use of our energy resources. Among the various fuels which can be ...

Characterization of proton-conducting electrolyte based on La0.9Sr0.1YO3-δ and its application in a hydrogen amperometric sensor

Kalyakin A., Lyagaeva J., Medvedev D., Volkov A., Demin A., Tsiakaras P. (2016)

In the present study, a Sr-doped LaYO3 proton-conducting material is successfully synthesized by the citrate-nitrate combustion method and its phase features, microstructure, thermal behavior and transport properties are ...

Combined amperometric and potentiometric hydrogen sensors based on BaCe0.7Zr0.1Y0.2O3-δ proton-conducting ceramic

Kalyakin A., Volkov A., Lyagaeva J., Medvedev D., Demin A., Tsiakaras P. (2016)

The present study aims at the potential application of BaCe0.7Zr0.1Y0.2O3-δ proton-conducting material as an electrolyte for hydrogen sensor operating under potentiometric and amperometric modes. The reason of selection ...

Corrosion-induced hydrogen embrittlement in aluminum alloy 2024

Kamoutsi, H.; Haidemenopoulos, G. N.; Bontozoglou, V.; Pantelakis, S. (2005)

Corrosion is a major concern to the structural integrity of aging aircraft structures. The effect of corrosion on the damage tolerance ability of advanced aluminum alloys calls for consideration of the problems associated ...

Crude bio-glycerol aqueous phase reforming and hydrogenolysis over commercial SiO2Al2O3 nickel catalyst

Seretis A., Tsiakaras P. (2016)

In the present work, an one-pot Aqueous Phase Reforming (APR) and Aqueous Phase Hydrogenolysis (APH) of crude glycerol in a batch reactor containing commercial SiO2Al2O3 supported 65%Ni catalyst is performed. The effect ...

Direct alcohol fuel cells: Challenges and future trends

Brouzgou, A.; Tzorbatzoglou, F.; Tsiakaras, P. (2011)

Among the most considered future alternative energy conversion systems are fuel cells. A fuel cell is an electrochemical device that continuously and directly converts chemical energy to electricity with the most common ...

Effect of prior deformation and heat treatment on the corrosion-induced hydrogen trapping in aluminium alloy 2024

Kamoutsi, H.; Haidemenopoulos, G. N.; Bontozoglou, V.; Petroyiannis, P. V.; Pantelakis, S. (2014)

The nature of the corrosion-induced hydrogen trapping in Al-alloy 2024-T351 was studied by thermal desorption spectroscopy. The microstructure was altered by solution treatment and plastic deformation, prior to corrosion. ...

Electrocatalytic production of ammonia: Biomimetic electrode–electrolyte design for efficient electrocatalytic nitrogen fixation under ambient conditions

Liu Y., Huang B., Chen X., Tian Z., Zhang X., Tsiakaras P., Shen P.K. (2020)

Electrocatalytic nitrogen reduction offers a vital approach for nitrogen fixation in a green and sustainable way, but the low solubility of nitrogen and the competitive hydrogen evolution reaction still impede its further ...

Enhanced hydrogen evolution activity over microwave-assisted functionalized 3D structured graphene anchoring FeP nanoparticles

Wang D., Lu J., Luo L., Jing S., Abbo H.S., Titinchi S.J.J., Chen Z., Tsiakaras P., Yin S. (2019)

Exploring low-cost and high-performance electrocatalysts for hydrogen evolution reaction (HER) still remains a challenging issue. An efficient strategy to enhance HER activity concerns with designing suitable substrates ...

Highly efficient electrocatalysts for oxygen reduction reaction: Nitrogen-doped PtNiMo ternary alloys

Luo L., Abbo H.S., Titinchi S.J.J., Tsiakaras P., Yin S. (2019)

The relatively low efficiency of the reaction of oxygen reduction (ORR) remains among the main obstacles for hydrogen fed proton exchange membrane fuel cells (H-PEMFCs) commercialization. In the present work, PtNiMo ternary ...

Hydrogenolysis of glycerol to propylene glycol by in situ produced hydrogen from aqueous phase reforming of glycerol over SiO2-Al2O3 supported nickel catalyst

Seretis A., Tsiakaras P. (2016)

In the present work, the reactions of glycerol's aqueous phase reforming (APR) and Aqueous Phase Hydrogenolysis (APH) in a batch reactor containing SiO2-Al2O3 supported 65% Ni catalyst are performed. The effect of: i) the ...

Interface charges redistribution enhanced monolithic etched copper foam-based Cu2O layer/TiO2 nanodots heterojunction with high hydrogen evolution electrocatalytic activity

Long B., Yang H., Li M., Balogun M.-S., Mai W., Ouyang G., Tong Y., Tsiakaras P., Song S. (2019)

Semiconducting materials are considered as excellent electrocatalysts for electrochemical water splitting; however, there is still a lack of relevant design and understanding of semiconducting composite electrodes. Here, ...