Electrocatalytic properties of platinum nanocenters electrogenerated at ultra-trace levels within zeolitic phosphododecatungstate cesium salt matrices

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Media - popular culture - politics: interactions and new phenomena

Praca recenzowana / peer-reviewed pape

Beyond Climate Anxiety: Development and Validation of the Inventory of Climate Emotions (ICE): a Measure of Multiple Emotions Experienced in Relation to Climate Change

There is a growing research interest in the affective aspects of climate change and their links with pro-climate engagement. Yet, psychometrically valid instruments assessing the wide panorama of emotional responses to climate change are limited. Here, we report on the development and validation of the Inventory of Climate Emotions (ICE), a self-report measure of multiple emotions experienced in relation to climate change. Based on qualitative exploration, literature review, along with expert and target population content validation, we operationally defined a spectrum of emotional responses to climate change which guided the formulation of a large initial item pool. High psychometric quality of the ICE was secured in two quantitative studies conducted in samples from the general population in Poland. In Study 1, based on exploratory factor analysis, we indicate that a broad range of emotional responses to climate change can be viably captured by 8 underlying factors: anger, contempt, enthusiasm, powerlessness, guilt, isolation, anxiety, and sorrow. This structure was corroborated in Study 2 with confirmatory factor analysis on an independent sample. Across studies, we provide evidence for the reliability and validity of the ICE in terms of internal consistency of the subscales and convergent, discriminant and concurrent validity. We also show the functionality of the ICE in the context of pro-climate behaviour. The ICE provides an integrative approach to emotional responses to climate change and it can be used to further the understanding of the complex role of emotions in climate change engagement

Low-Noble-Metal-Loading Hybrid Catalytic System for Oxygen Reduction Utilizing Reduced-Graphene-Oxide-Supported Platinum Aligned with Carbon-Nanotube-Supported Iridium

Hybrid systems composed of the reduced graphene oxide-supported platinum and multiwalled carbon nanotube-supported iridium (both noble metals utilized at low loadings on the level of 15 and 642 \ub5g cm 122 , respectively) were considered as catalytic materials for the reduction of oxygen in acid media (0.5-mol dm 123 H2SO4). The electrocatalytic activity toward reduction of oxygen and formation of hydrogen peroxide intermediate are tested using rotating ring\u2013disk electrode (RRDE) voltammetric experiments. The efficiency of the proposed catalytic systems was also addressed by performing galvanodynamic measurements with gas diffusion electrode (GDE) half-cell at 80 \u25e6C. The role of carbon nanotubes is to improve charge distribution at the electrocatalytic interface and facilitate the transport of oxygen and electrolyte in the catalytic systems by lowering the extent of reduced graphene oxide restacking during solvent evaporation. The diagnostic electrochemical experiments revealed that\u2014in iridium-containing systems\u2014not only higher disk currents, but also somehow smaller ring currents are produced (when compared to the Ir-free reduced graphene oxide-supported platinum), clearly implying formation of lower amounts of the undesirable hydrogen peroxide intermediate. The enhancement effect originating from the addition of traces of iridium (supported onto carbon nanotubes) to platinum, utilized at low loading, may originate from high ability of iridium to induce decomposition of the undesirable hydrogen peroxide intermediate

Ion-selective electrodes based on p-tert-butyl-homooxacalixarene di(ethyl)amides

A series of sandwich, monomeric, dimeric and polymeric complexes supported with 1,8-xanthone-18-crown-5 (L) were synthesised. Mass spectrum experiments suggested the existence of sandwich and monomeric complexes in solution. And the structure characterisations of six new complexes by single-crystal X-ray diffraction show the strong coordination of xanthone-18-crown-5 carbonyl oxygen with alkaline earth metal cation, which results high fluorescent increase in alkaline earth metal complexes.. - Polish Ministry of Higher Education and Science [N N204 274235]. - Financial support from the Polish Ministry of Higher Education and Science, Grant No. N N204 274235, is gratefully acknowledged. We also thank Dr J. Chojnacki from Gdansk University of Technology for X-ray crystal structure determination