Repository of the University of Namur
Not a member yet
94692 research outputs found
Sort by
Tuning Spin Polarization of Iron in Oxides to Boost Electrocatalytic Ammonia Production
No full textThe electrocatalytic nitrogen reduction reaction (NRR) for ammonia production has gained attention for its potential to reduce energy consumption and environmental impact. However, effective NRR catalysts currently rely on expensive noble metals, the development of cost-effective transition metal alternatives remains highly challenging. Iron-based catalysts are underexplored because of their inherently low reactivity. In this study, it is found that tailoring spin polarization, specifically the occupation state of electronics on d orbital in iron oxides, can highly boost NRR performance with carefully designed spin polarization. Iron in perovskite SrFeO3 with higher spin polarization shows 79 times increase in ammonia yield compared to iron in Fe2O3. This improvement is accompanied with 9 times increase in charge transfer between iron and *NNH, the rate-determining step of NRR manipulating the spin polarization of transition metals can lead to efficient catalysts for electrochemical NRR, offering valuable insights for enhancing catalyst performance and enabling more sustainable ammonia production.</p
Compte rendu de "R. Casavecchia , M. Maniaci, G. Orofino, La Bibbia a Montecassino/The Bible at Montecassino"
No full text
Corrigendum to “Association of cytomegalovirus serostatus with ELOVL2 methylation:Implications for lipid metabolism, inflammation, DNA damage, and repair capacity in the MARK-AGE study population” [Mech. Ageing Dev. 225 (2025) 112043] (Mechanisms of Ageing and Development (2025) 225, (S0047637425000193), (10.1016/j.mad.2025.112043))
No full textThe authors regret the following errors in the original publication: 1) Author name correction: The name of María Moreno Villanueva should be corrected to María Moreno-Villanueva, with a hyphen between the surnames.2) Author affiliation update for Marco Malavolta: In addition to the currently listed affiliation (Advanced Technology Center for Aging Research and Geriatric Mouse Clinic, IRCCS INRCA, Ancona, Italy), please add the following affiliation: Department of Clinical and Molecular Sciences, Disclimo, Università Politecnica delle Marche, Ancona, Italy.3) Author affiliation update for Monia Cecati:Please replace the current affiliation (Advanced Technology Center for Aging Research and Geriatric Mouse Clinic, IRCCS INRCA, Ancona, Italy) with the following: Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Roma Open University, 00166 Rome, Italy. The authors would like to apologise for any inconvenience caused and thank the Editor for their kind assistance in implementing the necessary corrections.</p
Who buys social bank shares? Exploring individual financial and non-pecuniary motives
No full textThis paper investigates the motives of retail investors who buy shares of social banks—double bottom line financial intermediaries whose mission is to fund social enterprises. To do so, we combine survey data and behavior in an incentivized experiment to assemble a unique dataset of social bank members and non-members. Our analysis delivers three key results. First, members exhibit a significant lack of trust towards conventional banks. Second, their decision to buy social bank shares is primarily related to non-financial motives, although financial motives still play some role. Third, we find that members do not seem to buy social bank shares to boost their social reputation. As a contribution to the critical “value” versus “values” debate, our analysis notably highlights the crucial role of non-financial motives in channeling private financial capital towards investments that may not be financially attractive but that may prove essential in addressing current global societal challenges.</p
Enhanced photocatalytic performance of V<sub>2</sub>O<sub>5</sub> NRs/RGO nanocomposites for Rhodamine-B decolorization under solar irradiation:Experimental and theoretical study
No full textIn the present work, an essential advance in the preparation of novel nanocomposites based on functionalized V2O5 nanostructures with reduced graphene oxide by hydrothermal method, which has great potential for use in photocatalytic processes related to environmental remediation. XRD analysis confirmed V2O5 in an orthorhombic structure. SEM images showed transparent RGO layers well anchored onto the surface of the V2O5 with a homogeneous distribution. Raman spectroscopy further explained the hybridization and interaction between the components. The photocatalytic activity of Rhodamine-B in aqueous solutions has been studied upon irradiation with visible light. A high RhB degradation was obtained using the V2O5/RGO photocatalyst (82 %), compared to the degradation obtained with only V2O5 (60 %). First-principles Density Functional Theory (DFT) simulations reveal a strong interaction between V2O5 molecules and graphene surfaces, with an adsorption energy of −1.673 eV and a significant charge transfer of 0.367 e− to RGO. This interaction modifies the electronic structure, creating semi-metallic behavior near the Fermi level and enhancing catalytic activity through improved charge carrier dynamics and active sites for photocatalytic applications.</p
