Results 61 to 70 of about 469,071 (291)

Tuning the Electronic Structure and Spin State of Fe─N─C Catalysts Using an Axial Oxygen Ligand and Fe Clusters for High‐Efficiency Rechargeable Zinc–Air Batteries

Advanced Functional Materials, EarlyView.
A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou, Yu Mao, Mengyao Chang, Ziyun Wang, Wenke Xie, Cuizhu Ye, Shanghai Wei, Lars Thomsen, Geoffrey I. N. Waterhouse   +8 more
wiley   +1 more source

Tempo Fóssil: petróleo, arte e corpo na cosmopolítica do Antropoceno

Revista Brasileira de Estudos da Presença, 2018
Uma investigação artística e teórica sobre os combustíveis fósseis, os agenciamentos industriais na natureza e seus reflexos nas estruturas sociais e sistemas de poder. Com o objetivo de examinar a atuação das artes nos embates cosmopolíticos do presente
Mari Fraga
doaj   +1 more source

Avaliação do desempenho ambiental do etanol de milho para o Brasil. [PDF]

, 2015
Resumo: Segundo a Agência Nacional de Petróleo, Gás Natural e Biocombustíveis, a demanda de etanol no Brasil alcançou os 9,9 milhões de m³ em 2012. No entanto, o setor sucroalcooleiro vem passando por uma fase de crise.
DONKE, A. C. G., KULAY, L. A., MATAI, P. H. L. dos S., MATSUURA, M. I. da S. F.   +3 more
core  

Creation of museums as strategy for preservation of the fossil heritage of Araripe sedimentary basin in Pernambuco, NE, Brazil [PDF]

, 2016
O Araripe pernambucano tem excelentes exposições de rochas da Formação Santana, Bacia Sedimentar do Araripe (PE, CE e PI), reconhecida internacionalmente pelos fósseis de vertebrados, preservados em concreções, considerados entre os mais importantes do ...
Araripe, R. C., Barreto, A. M. F., Brilha, J. B., Carvalho, A. R. A., do Prado, L. C., Duque, R. R. C., Ghilardi, A. M., Pereira, P. A.   +7 more
core   +3 more sources

From Waste to Value: Conversion of Calcium Sulfate to Vaterite via Carbon Capture and Storage

Advanced Functional Materials, EarlyView.
This study introduces a new concept for carbon management that relies on the carbonation of industrial gypsum waste and yields phase‐pure vaterite at ambient conditions without any additives. The obtained vaterite is further shown to be a reactive material that develops compressive strength in aqueous suspensions like conventional cements.
Carlos Pimentel, German Montes‐Hernández, Pablo Almarza‐Cifuentes, Matthias Kellermeier, Alexander E.S. Van Driessche   +4 more
wiley   +1 more source

Pore Size Effects of Mesoporous N‐Doped Carbon Nanospheres as Advanced Support Material on the Activity of Molybdenum Sulfide Catalysts for the Hydrogen Evolution Reaction

Advanced Functional Materials, EarlyView.
By tuning the pore size of mesoporous N‐doped carbon (MPNC) nanospheres as support material for molybdenum sulfide, the electrochemical activity of the composite material for the hydrogen evolution reaction can be optimized. An ideal MPNC pore size of 60 nm allows a high number of molybdenum sulfide active sites while maintaining efficient proton and ...
Niklas Ortlieb, Christian Völker, Lars Guggolz, Anna Fischer   +3 more
wiley   +1 more source

Esclarecendo as relações filogenéticas e diversificação dos bivalves da Superfamília Mytiloidea(Mollusca:Bivalvia:Pteriomorphia [PDF]

, 2017
A superfamília Mytiloidea Rafinesque, 1815 foi descrita originalmente com apenas uma família: Mytilidae Rafinesque, 1815. Posteriores revisões da classificação original sugerem que Mytiloidea possa ser subdividida em mais de uma família.
DALBEM, G. B.
core  

Desenvolvimento de Atividade Lúdica para o Auxílio do Ensino e Divulgação Científica da Paleontologia. [PDF]

, 2007
Herein is described the development of a ludical activity in Paleontology with the purpose to apply the concepts of the geological time and the processes that occurred along the history of the Earth. This activity,that was teste in the event “Bio na Rua”
Ana Carolina Fortes Bastos, Diogo Jorge de Melo, Vanessa Maria da Costa Rodrigues, Vinícius de Moraes Monção   +3 more
core   +2 more sources

Toward Scalable Solutions for Silver‐Based Gas Diffusion Electrode Fabrication for the Electrochemical Conversion of CO2 – A Perspective

Advanced Functional Materials, EarlyView.
In this study, the preparation techniques for silver‐based gas diffusion electrodes used for the electrochemical reduction of carbon dioxide (eCO2R) are systematically reviewed and compared with respect to their scalability. In addition, physics‐based and data‐driven modeling approaches are discussed, and a perspective is given on how modeling can aid ...
Simon Emken, K. Ashoke Raman, Alexander Bauer, Violeta Karyofylli, Eva Jodat, André Karl, Rüdiger‐A. Eichel   +6 more
wiley   +1 more source

Shrimps from the Santana Group (Cretaceous: Albian): new species (Crustacea: Decapoda: Dendrobranchiata) and new record (Crustacea: Decapoda: Caridea)

Anais da Academia Brasileira de Ciências, 2014
The fossil shrimp Araripenaeus timidus n. gen. n. sp. is the first fossil Penaeoidea from Brazil. Here, we describe, illustrate and compare it with Paleomattea deliciosa, a fossil Sergestoidea (Dendrobranchiata) previously described from the same region.
ALLYSSON P. PINHEIRO, ANTÔNIO ÁF. SARAIVA, WILLIAM SANTANA   +2 more
doaj   +1 more source