{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,13]],"date-time":"2025-10-13T15:36:20Z","timestamp":1760369780563,"version":"build-2065373602"},"reference-count":38,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2021,12,14]],"date-time":"2021-12-14T00:00:00Z","timestamp":1639440000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Regional Government of Andalusia","award":["RNM172"],"award-info":[{"award-number":["RNM172"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>This work shows the preparation of carbon nanospheres with a high superficial nitrogen content (7 wt.%), obtained by a simple hydrothermal method, from pyrocatechol and formaldehyde, around which tungsten nanophases have been formed. One of these nanophases is tungsten carbide, whose electro-catalytic behavior in the ORR has been evaluated together with the presence of nitrogen surface groups. Both current and potential kinetic density values improve considerably with the presence of tungsten, despite the significant nitrogen loss detected during the carbonization treatment. However, the synergetic effect that the WC has with other electro-catalytic metals in this reaction cannot be easily evaluated with the nitrogen in these materials, since both contents vary in opposite ways. Nevertheless, all the prepared materials carried out oxygen electro-reduction by a mixed pathway of two and four electrons, showing remarkable electro-catalytic behavior.<\/jats:p>","DOI":"10.3390\/ma14247716","type":"journal-article","created":{"date-parts":[[2021,12,14]],"date-time":"2021-12-14T11:11:35Z","timestamp":1639480295000},"page":"7716","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Growing Tungsten Nanophases on Carbon Spheres Doped with Nitrogen. Behaviour as Electro-Catalysts for Oxygen Reduction Reaction"],"prefix":"10.3390","volume":"14","author":[{"given":"Teresa","family":"Briz-Amate","sequence":"first","affiliation":[{"name":"Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avenida de Fuente Nueva s\/n, 18071 Granada, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2799-1866","authenticated-orcid":false,"given":"Jesica","family":"Castelo-Quib\u00e9n","sequence":"additional","affiliation":[{"name":"Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avenida de Fuente Nueva s\/n, 18071 Granada, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Esther","family":"Bail\u00f3n-Garc\u00eda","sequence":"additional","affiliation":[{"name":"Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avenida de Fuente Nueva s\/n, 18071 Granada, Spain"},{"name":"Unit of Excellence in Chemistry Applied to Biomedicine and the Environment, University of Granada, Avenida de Fuente Nueva s\/n, 18071 Granada, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3822-2752","authenticated-orcid":false,"given":"Abdalla","family":"Abdelwahab","sequence":"additional","affiliation":[{"name":"Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef 62511, Egypt"},{"name":"Faculty of Science, Galala University, Suez 43511, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2516-7806","authenticated-orcid":false,"given":"Francisco","family":"Carrasco-Mar\u00edn","sequence":"additional","affiliation":[{"name":"Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avenida de Fuente Nueva s\/n, 18071 Granada, Spain"},{"name":"Unit of Excellence in Chemistry Applied to Biomedicine and the Environment, University of Granada, Avenida de Fuente Nueva s\/n, 18071 Granada, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1483-0035","authenticated-orcid":false,"given":"Agust\u00edn F.","family":"P\u00e9rez-Cadenas","sequence":"additional","affiliation":[{"name":"Carbon Materials Research Group, Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avenida de Fuente Nueva s\/n, 18071 Granada, Spain"},{"name":"Unit of Excellence in Chemistry Applied to Biomedicine and the Environment, University of Granada, Avenida de Fuente Nueva s\/n, 18071 Granada, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,12,14]]},"reference":[{"unstructured":"Barbir, F. 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