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Photocatalytic H-2 Production Using Pt-TiO2 in the Presence of Oxalic Acid: Influence of the Noble Metal Size and the Carrier Gas Flow Rate
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The primary objective of the experiments was to investigate the differences in the photocatalytic performance when commercially available Aeroxide P25 TiO2 photocatalyst was deposited with differently sized Pt nanoparticles with identical platinum content (1 wt%). The noble metal deposition onto the TiO2 surface was achieved by in situ chemical reduction (CRIS) or by mixing chemically reduced Pt nanoparticle containing sols to the aqueous suspensions of the photocatalysts (sol-impregnated samples, CRSIM). Fine and low-scale control of the size of resulting Pt nanoparticles was obtained through variation of the trisodium citrate concentration during the syntheses. The reducing reagent was NaBH4. Photocatalytic activity of the samples and the reaction mechanism were examined during UV irradiation (lambda(max) = 365 nm) in the presence of oxalic acid (50 mM) as a sacrificial hole scavenger component. The H-2 evolution rates proved to be strongly dependent on the Pt particle size, as well as the irradiation time. A significant change of H-2 formation rate during the oxalic acid transformation was observed which is unusual. It is probably regulated both by the decomposition rate of accumulated oxalic acid and the H+/H-2 redox potential on the surface of the catalyst. The later potential is influenced by the concentration of the dissolved H-2 gas in the reaction mixture.
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<div class="JournalArticle Publication short-list"> <div class="authors"> <span class="author-name" mtid="10038162"> <a href="/gui2/?type=authors&mode=browse&sel=10038162" target="_blank">Kmetyko, A</a> </span> <span class="author-type"> </span> ; <span class="author-name" mtid="10025874"> <a href="/gui2/?type=authors&mode=browse&sel=10025874" target="_blank">Mogyorosi, K</a> </span> <span class="author-type"> </span> ; <span class="author-name" > Gerse, V </span> <span class="author-type"> </span> ; <span class="author-name" mtid="10000005"> <a href="/gui2/?type=authors&mode=browse&sel=10000005" target="_blank">Konya, Z</a> </span> <span class="author-type"> </span> ; <span class="author-name" mtid="10038187"> <a href="/gui2/?type=authors&mode=browse&sel=10038187" target="_blank">Pusztai, P</a> </span> <span class="author-type"> </span> ; <span class="author-name" mtid="10002180"> <a href="/gui2/?type=authors&mode=browse&sel=10002180" target="_blank">Dombi, A ✉</a> </span> <span class="author-type"> </span> ; <span class="author-name" mtid="10001688"> <a href="/gui2/?type=authors&mode=browse&sel=10001688" target="_blank">Hernadi, K</a> </span> <span class="author-type"> </span> </div ><div class="title"><a href="/gui2/?mode=browse¶ms=publication;2792466" mtid="2792466" target="_blank">Photocatalytic H-2 Production Using Pt-TiO2 in the Presence of Oxalic Acid: Influence of the Noble Metal Size and the Carrier Gas Flow Rate</a></div> <div class="pub-info"> <span class="journal-title">MATERIALS</span> <span class="journal-volume">7</span> : <span class="journal-issue">10</span> <span class="page"> pp. 7022-7038. , 17 p. </span> <span class="year">(2014)</span> </div> <div class="pub-end"><div class="identifier-list"> <span class="identifiers"> <span class="id identifier oa_GOLD" title=" Gold "> <a style="color:blue" title="10.3390/ma7107022" target="_blank" href="https://doi.org/10.3390/ma7107022"> DOI </a> </span> <span class="id identifier oa_none" title="none"> <a style="color:blue" title="000344459200010" target="_blank" href="https://www.webofscience.com/wos/woscc/full-record/000344459200010"> WoS </a> </span> <span class="id identifier oa_none" title="none"> <a style="color:blue" title="84920973805" target="_blank" href="http://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-84920973805"> Scopus </a> </span> <span class="id identifier oa_GREEN" title=" Green "> <a style="color:blue" title="4950" target="_blank" href="http://publicatio.bibl.u-szeged.hu/4950"> SZTE Publicatio </a> </span> </span> </div> <div class="short-pub-prop-list"> <span class="deleted-record">Zárolt</span> <span class="short-pub-mtid"> Közlemény:2792466 </span> <span class="status-holder"><span class="status-data status-VALIDATED"> Egyeztetett </span></span> <span class="pub-core">Forrás Idéző </span> <span class="pub-type">Folyóiratcikk (Szakcikk ) </span> <!-- && !record.category.scientific --> <span class="pub-category">Tudományos</span> <div class="publication-citation" style="margin-left: 0.5cm;"> <span title="Nyilvános idézőközlemények összesen, említések nélkül" class="citingPub-count">Nyilvános idéző összesen: 25</span> | Független: 21 | Függő: 4 | Nem jelölt: 0 | WoS jelölt: 19 | Scopus jelölt: 18 | WoS/Scopus jelölt: 19 | DOI jelölt: 21 </div> </div> </div> </div><div class="JournalArticle Publication long-list"> <div class="authors"> <img title="Forrásközlemény" style="float: left" src="/frontend/resources/grid/publication-core-icon.png"> <img title="Idézőközlemény" style="float: left" src="/frontend/resources/grid/publication-citation-icon.png"> <div class="autype autype0"> <span class="author-name" mtid="10038162"><a href="/gui2/?type=authors&mode=browse&sel=10038162" target="_blank">Kmetyko A (<span class="authorship-author-name">Kmetykó Ákos</span> <span class="authorAux-mtmt"> Környezeti kémia</span>) </a> </span> ; <span class="author-name" mtid="10025874"><a href="/gui2/?type=authors&mode=browse&sel=10025874" target="_blank">Mogyorosi K (<span class="authorship-author-name">Mogyorósi Károly</span> <span class="authorAux-mtmt"> Környezeti kémia</span>) </a> </span> ; <span class="author-name" >Gerse V </span> ; <span class="author-name" mtid="10000005"><a href="/gui2/?type=authors&mode=browse&sel=10000005" target="_blank">Konya Z (<span class="authorship-author-name">Kónya Zoltán</span> <span class="authorAux-mtmt"> Nanotechnológia</span>) </a> </span> <span class="author-affil"><span title="Szegedi Tudományegyetem">SZTE</span>/<span title="Természettudományi és Informatikai Kar">TTIK</span>/<span title="Kémiai Tanszékcsoport">KTCS</span>/Alkalmazott és Környezeti Kémiai Tanszék</span> ; <span class="author-name" mtid="10038187"><a href="/gui2/?type=authors&mode=browse&sel=10038187" target="_blank">Pusztai P (<span class="authorship-author-name">Pusztai Péter</span> <span class="authorAux-mtmt"> kémia, gépi tanulás</span>) </a> </span> <span class="author-affil"><span title="Szegedi Tudományegyetem">SZTE</span>/<span title="Természettudományi és Informatikai Kar">TTIK</span>/<span title="Kémiai Tanszékcsoport">KTCS</span>/Alkalmazott és Környezeti Kémiai Tanszék</span> ; <span class="author-name" mtid="10002180"><a href="/gui2/?type=authors&mode=browse&sel=10002180" target="_blank">Dombi A ✉ (<span class="authorship-author-name">Dombi András</span> <span class="authorAux-mtmt"> Környezeti kémia</span>) </a> </span> ; <span class="author-name" mtid="10001688"><a href="/gui2/?type=authors&mode=browse&sel=10001688" target="_blank">Hernadi K (<span class="authorship-author-name">Hernádi Klára</span> <span class="authorAux-mtmt"> Anyagtudomány</span>) </a> </span> <span class="author-affil"><span title="Szegedi Tudományegyetem">SZTE</span>/<span title="Természettudományi és Informatikai Kar">TTIK</span>/<span title="Kémiai Tanszékcsoport">KTCS</span>/Alkalmazott és Környezeti Kémiai Tanszék</span> </div> </div> <div class="title"><a href="/gui2/?mode=browse¶ms=publication;2792466" target="_blank">Photocatalytic H-2 Production Using Pt-TiO2 in the Presence of Oxalic Acid: Influence of the Noble Metal Size and the Carrier Gas Flow Rate</a></div> <div> <span class="journal-title">MATERIALS</span> <span class="journal-issn">( <a target="_blank" href="https://portal.issn.org/resource/ISSN/1996-1944">1996-1944</a>)</span>: <span class="journal-volume">7</span> <span class="journal-issue">10</span> <span class="page"> pp 7022-7038 </span> <span class="year">(2014)</span> </div> <div class="pub-footer"> <span class="language" xmlns="http://www.w3.org/1999/html">Nyelv: Angol | </span> <span class="identifiers"> <span class="id identifier oa_GOLD" title=" Gold "> <a style="color:blue" title="10.3390/ma7107022" target="_blank" href="https://doi.org/10.3390/ma7107022"> DOI </a> </span> <span class="id identifier oa_none" title="none"> <a style="color:blue" title="000344459200010" target="_blank" href="https://www.webofscience.com/wos/woscc/full-record/000344459200010"> WoS </a> </span> <span class="id identifier oa_none" title="none"> <a style="color:blue" title="84920973805" target="_blank" href="http://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-84920973805"> Scopus </a> </span> <span class="id identifier oa_GREEN" title=" Green "> <a style="color:blue" title="4950" target="_blank" href="http://publicatio.bibl.u-szeged.hu/4950"> SZTE Publicatio </a> </span> </span> <div class="publication-citation" style="margin-left: 0.5cm;"> <span title="Nyilvános idézőközlemények összesen, említések nélkül" class="citingPub-count">Nyilvános idéző összesen: 25</span> | Független: 21 | Függő: 4 | Nem jelölt: 0 | WoS jelölt: 19 | Scopus jelölt: 18 | WoS/Scopus jelölt: 19 | DOI jelölt: 21 </div> <div class="publication-citation"> <a target="_blank" href="/api/publication?cond=citations.related;eq;2792466&sort=publishedYear,desc&sort=title"> Idézett közlemények száma: 2 </a> </div> <div class="mtid"><span class="long-pub-mtid">Közlemény: 2792466</span> | <span class="status-data status-VALIDATED"> Egyeztetett </span> <span class="oldId">Régi azonosító: 2792466</span> | Forrás Idéző | <span class="type-subtype">Folyóiratcikk ( Szakcikk ) </span> | <span class="pub-category">Tudományos</span> | <span class="publication-sourceOfData">WOS</span> </div> <div class="notDuplums"><a target="_blank" href="/api/publication/2792466/notduplums">1 Nem duplumnak jelölés</a> </div> <div class="lastModified">Utolsó módosítás: 2018.10.11. 05:54 WoS import (admin) </div> <div class="lockedBy">Ideiglenesen zárolva 2021.10.23. 02:45 Nemec Évi (MTMT Központi 3, admin) MTMT API (MTMT API user, admin) </div> </div></div>