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1.
Transient photocurrents in oligothiophene-based ultrathin film transistors
Egon Pavlica, Robert Hudej, Gvido Bratina, M. Leufgen, U. Bass, J. Geurts, L. W. Molenkamp, T. Muck, V. Wagner, 2004, published scientific conference contribution abstract

Found in: osebi
Published: 15.10.2013; Views: 4462; Downloads: 10
URL Fulltext (0,00 KB)

2.
Beyond Knower Levels: Early partial knowledge of number words
David Barner, Rok Žaucer, Jessica Sullivan, Tina Razboršek, Vesna Plesničar, Katie Wagner, Franc Marušič, 2015, published scientific conference contribution abstract

Abstract: Although both syntax and number words can indicate quantity, only numbers can specify large exact quantities. Do children use syntax to bootstrap preliminary meanings of number words before mastering precise meanings? We compared errors across languages on a Give-a-Number task in non-knowers (who have adult meanings for no number words) and subset knowers (who have adult meanings for fewer than five number words). Participants included learners of English, Spanish, French, and two dialects of Slovenian. One dialect, Central Slovenian, has rich number morphology including singular, dual, small plural, and large plural (for 5+). In all languages, subset knowers and some non-knowers demonstrated better than random responding for at least 2 number words beyond the largest number word they comprehended precisely. Additionally, Central Slovenian-learning non- and 1- knowers responded more accurately to requests for higher numbers than their counterparts in other languages, suggesting that rich plural marking may bootstrap number word meanings.
Found in: osebi
Keywords: knower level, grammatical number, acquisition of number words, bootstrapping
Published: 21.03.2016; Views: 3042; Downloads: 0
.pdf Fulltext (1,99 MB)

3.
Resolving the dilemma of Fe-N-C catalysts by the selective synthesis of tetrapyrrolic active sites via an imprinting strategy
Tim-Patrick Fellinger, Beate Paulus, Miran Gaberšček, Francisco Ruiz-Zepeda, Friedrich Wagner, Burak Koyutürk, Iztok Arčon, Yan-Sheng Li, Jian Liang Low, Davide Menga, 2021, original scientific article

Abstract: Combining the abundance and inexpensiveness of their constituent elements with their atomic dispersion, atomically dispersed Fe−N−C catalysts represent the most promising alternative to precious-metal-based materials in proton exchange membrane (PEM) fuel cells. Due to the high temperatures involved in their synthesis and the sensitivity of Fe ions toward carbothermal reduction, current synthetic methods are intrinsically limited in type and amount of the desired, catalytically active Fe− N4 sites, and high active site densities have been out of reach (dilemma of Fe−N−C catalysts). We herein identify a paradigm change in the synthesis of Fe−N−C catalysts arising from the developments of other M−N−C single-atom catalysts. Supported by DFT calculations we propose fundamental principles for the synthesis of M−N−C materials. We further exploit the proposed principles in a novel synthetic strategy to surpass the dilemma of Fe−N−C catalysts. The selective formation of tetrapyrrolic Zn−N4 sites in a tailor-made Zn−N−C material is utilized as an active-site imprint for the preparation of a corresponding Fe−N−C catalyst. By successive low- and high-temperature ion exchange reactions, we obtain a phase-pure Fe−N−C catalyst, with a high loading of atomically dispersed Fe (>3 wt %). Moreover, the catalyst is entirely composed of tetrapyrrolic Fe−N4 sites. The density of tetrapyrrolic Fe−N4 sites is more than six times as high as for previously reported tetrapyrrolic single-site Fe−N−C fuel cell catalysts
Found in: osebi
Keywords: Fe-N-C catalysts, selective synthesis, tetrapyrrolic active sites, EXAFS, XANES, single atom, DFT
Published: 25.10.2021; Views: 185; Downloads: 3
URL Fulltext (0,00 KB)
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