Search Results - "Macedo, Daniel A"

1D hollow MFe2O4 (M = Cu, Co, Ni) fibers by Solution Blow Spinning for oxygen evolution reaction by Silva, Vinícius D., Ferreira, Luciena S., Simões, Thiago A., Medeiros, Eliton S., Macedo, Daniel A.

“…[Display omitted] The development of low-cost transition metal electrocatalysts for the oxygen evolution reaction (OER) has been the focus of intense research…”
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Microstructural influence of sigma phase on pitting corrosion behavior of duplex stainless steel/NaCl electrolyte couple by Silva, David D.S., Simões, Thiago A., Macedo, Daniel A., Bueno, Alysson H.S., Torres, Sandro M., Gomes, Rodinei M.

“…This study reports the effects of the sigma phase on pitting corrosion behavior of thermally-aged duplex stainless steel (DSS). Analysis via structural,…”
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Structure, densification and electrical properties of Gd3+ and Cu2+ co-doped ceria solid electrolytes for SOFC applications: Effects of Gd2O3 content by Santos, Thamyscira H., Grilo, João P.F., Loureiro, Francisco J.A., Fagg, Duncan P., Fonseca, Fábio C., Macedo, Daniel A.

“…Ceria-based solid electrolytes exhibit superior electrical conductivity compared to traditional yttria-stabilized zirconia ceramics. However, they require high…”
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NiFe Alloy Nanoparticles Tuning the Structure, Magnetism, and Application for Oxygen Evolution Reaction Catalysis by Raimundo, Rafael A, Silva, Vinícius D, Ferreira, Luciena S, Loureiro, Francisco J. A, Fagg, Duncan P, Macedo, Daniel A, Gomes, Uílame U, Soares, Márcio M, Gomes, Rodinei M, Morales, Marco A

“…In this study, Ni-Fe alloy nanoparticles were prepared using the proteic sol–gel method, followed by a reduction in H2 at 500 and 700 °C, namely hereafter as…”
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Nanoparticles of Mixed-Valence Oxides MnXCO3-XO4 (0 ≤ X ≤ 1) Obtained with Agar-Agar from Red Algae (Rhodophyta) for Oxygen Evolution Reaction by Santos, Jakeline Raiane D., Raimundo, Rafael A., Silva, Thayse R., Silva, Vinícius D., Macedo, Daniel A., Loureiro, Francisco J. A., Torres, Marco A. M., Tonelli, Domenica, Gomes, Uílame U.

“…The development of efficient electrocatalysts for the oxygen evolution reaction (OER) is of paramount importance in sustainable water-splitting technology for…”
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Impact of the NiO nanostructure morphology on the oxygen evolution reaction catalysis by Silva, Vinícius D., Simões, Thiago A., Grilo, João P. F., Medeiros, Eliton S., Macedo, Daniel A.

“…The oxygen evolution reaction (OER) is still a barrier to energy generation technologies, motivating the development of new strategies to the rational use of…”
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Metal-organic frameworks as template for synthesis of Mn3+/Mn4+ mixed valence manganese cobaltites electrocatalysts for oxygen evolution reaction by Lourenço, Annaíres A., Silva, Vinícius D., da Silva, R.B., Silva, U.C., Chesman, C., Salvador, C., Simões, Thiago A., Macedo, Daniel A., da Silva, Fausthon F.

“…[Display omitted] Cobalt-based oxides are among the most promising electrocatalysts for oxygen evolution reactions (OER). In this context, this work reports…”
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Facile synthesis of hollow F‐doped SnO2 nanofibers and their efficiency in ethanol sensing by Nascimento, Emanuel P., Firmino, Hellen C. T., Santos, Adillys M. C., Sales, Herbet B., Silva, Vinícius D., Macedo, Daniel A., Neves, Gelmires A., Medeiros, Eliton S., Menezes, Romualdo R.

“…This paper reports for the first time the facile synthesis of hollow F‐doped SnO2 nanofibers by solution blow spinning (SBS) and their ethanol sensing…”
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1D hollow MFe 2 O 4 (M = Cu, Co, Ni) fibers by Solution Blow Spinning for oxygen evolution reaction by Silva, Vinícius D, Ferreira, Luciena S, Simões, Thiago A, Medeiros, Eliton S, Macedo, Daniel A

“…The development of low-cost transition metal electrocatalysts for the oxygen evolution reaction (OER) has been the focus of intense research. Herein, we report…”
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Structure, magnetic behavior and OER activity of CoFe2O4 powders obtained using agar-agar from red seaweed (Rhodophyta) by Ferreira, Luciena S., Silva, Thayse R., Santos, Jakeline R.D., Silva, Vinícius D., Raimundo, Rafael A., Morales, Marco A., Macedo, Daniel A.

“…This work is the first report on the synthesis of cobalt ferrite (CoFe2O4) powders by a proteic sol-gel green method that uses agar-agar from red seaweed…”
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Cathodic polarisation of composite LSCF-SDC IT-SOFC electrode synthesised by one-step microwave self-assisted combustion by Loureiro, Francisco J.A., Macedo, Daniel A., Nascimento, Rubens M., Cesário, Moisés R., Grilo, João P.F., Yaremchenko, Aleksey A., Fagg, Duncan P.

“…Nano-sized composite La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF)-Ce0.8Sm0.2O1.9 (SDC) powder was synthesised by one-step microwave self-assisted combustion synthesis and…”
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Solution blow spun nickel oxide/carbon nanocomposite hollow fibres as an efficient oxygen evolution reaction electrocatalyst by Silva, Vinícius D., Simões, Thiago A., Loureiro, Francisco J.A., Fagg, Duncan P., Figueiredo, Filipe M.L., Medeiros, Eliton S., Macedo, Daniel A.

“…The development of efficient electrocatalysts for slow reaction of the oxygen evolution reaction (OER) is fundamental for viability of the electrochemical…”
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The effect of particle size on structural and catalysts for oxygen evolution reaction of (CoFeNiMnCr)3O4 prepared by controlled synthesis with polyvinylpyrrolidone (PVP) by Alves, Ricardo F., Raimundo, Rafael A., Lima, Bruno A.S.G., Loureiro, Francisco J.A., Fagg, Duncan P., Macedo, Daniel A., Gomes, Uilame U., Morales, Marco A.

“…[Display omitted] •First report of PVP-assisted sol–gel synthesis for high-entropy oxides (HEO’s).•(CoNiMnFeCr)3O4 achieves 316 mV@10 mA cm−2 for OER.•Cr6+,…”
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Polarisation mechanism of the misfit Ca-cobaltite electrode for reversible solid oxide cells by Loureiro, Francisco J.A., Araújo, Allan J.M., Paskocimas, Carlos A., Macedo, Daniel A., Fagg, Duncan P.

“…•C349 electrode full mechanism is clarified for r-SOCs.•The very fast oxygen exchange overcomes the diffusion limitation of C349.•C349 performance is higher…”
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Electronic conductivity in Gd-doped ceria with salt additions by Grilo, João P.F., Macedo, Daniel A., Nascimento, Rubens M., Marques, Fernando M.B.

“…Samples of Gd-doped ceria (GDC, Ce0.9Gd0.1O1.95) with eutectic mixtures of Na2CO3 and Li2CO3 (NLC), or K2CO3, Na2CO3 and Li2CO3 (KNLC) as sintering aids…”
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High-entropy oxide nanofibers as catalysts to oxygen evolution reaction by Silva, Vinícius D., Raimundo, Rafael A., Silva, Thayse R., Simões, Thiago A., Macedo, Daniel A., Medeiros, Eliton S.

“…The need to replace electrodes based on noble metals is a necessity for the popularization of strategic energy technologies. In the catalysis of the oxygen…”
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Supersonic solution blowing: a novel approach to producing self-supported carbon–silica microporous nanofibers for Li-ion battery anodes by Silva, Vinícius D., Gonçalves, Josué M., Dias, Yasmin J., Simões, Thiago A., Macedo, Daniel A., Shahbazian-Yassar, Reza, Torresi, Roberto M., Yarin, Alexander L., Medeiros, Eliton S.

“…The development of self-supporting electrodes, which are binder-, and additives-free, is essential for increased performance and practical applications of…”
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Changing the oxygen reaction mechanism in composite electrodes by the addition of ionic- or ambipolar-conducting phases: Series or parallel pathways by Araújo, Allan J.M., Loureiro, Francisco J.A., Grilo, João P.F., Macedo, Daniel A., Paskocimas, Carlos A., Fagg, Duncan P.

“…•CGO- and CPO-based composite electrodes for solid oxide cells.•Improved catalytic behaviour of ceria with multivalent cations under high pO2.•Series pathways…”
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Green chemistry synthesis of Co3O4-CoO nanocomposite and electrochemical assessment for oxygen evolution reaction by Raimundo, Rafael A., Silva, Jonattan N., Silva, Thayse R, Araújo, Allan J.M., Oliveira, João F.G.A., de Lima, Laís C., Morales, Marco A., Soares, Márcio M., Macedo, Daniel A.

“…[Display omitted] •Co3O4-CoO nanocomposite synthesized by green chemistry.•Nanocomposite is efficient for oxygen evolution reaction.•Co3O4-CoO shows a low…”
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Proteic sol–gel synthesis of Gd-doped ceria: a comprehensive structural, chemical, microstructural and electrical analysis by Araújo, Allan J. M., Grilo, João P. F., Loureiro, Francisco J. A., Holz, Laura I. V., Macedo, Daniel A., Fagg, Duncan P., Paskocimas, Carlos A.

“…Gd-doped ceria (Ce 1− x Gd x O 2-δ ; x  = 0, 0.1 and 0.2) is one of the best ceramic electrolytes for application in solid oxide electrochemical devices. This…”
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