{"title":"在具有高浓度氧空位的掺杂 N 的碳材料上衍生 MOFs 的 TiO2 作为甲醇电氧化的铂支撑和助催化剂","authors":"Yuelei Si , Zhuo Zhang , Yaxiong Ji","doi":"10.1016/j.elecom.2023.107648","DOIUrl":null,"url":null,"abstract":"<div><p>MIL-125(Ti)–NH<sub>2</sub> was pyrolyzed in N<sub>2</sub> and H<sub>2</sub>/Ar gas to prepare N-doped carbon materials containing TiO<sub>2</sub> (TiO<sub>2</sub>-NC). XPS, ESR and Raman spectra analysis showed that higher concentration of oxygen vacancies were created on the surface of TiO<sub>2</sub> in H<sub>2</sub>/Ar gas, which provided more anchor sites for the nucleation of Pt and enhanced the interaction between Pt and TiO<sub>2</sub>. Therefore, the mass activity/specific activity of Pt/(TiO<sub>2</sub>-NC)<sub>HA</sub> catalysts for methanol oxidation was 510.7 mA mg<sup>−1</sup><sub>Pt</sub>/2.84 mA cm<sup>−2</sup><sub>Pt</sub>, which was 3.1/1.4 times that of Pt/(TiO<sub>2</sub>-NC)<sub>N</sub> catalysts. Due to the enriched OH<sub>ads</sub> on the suface of TiO<sub>2</sub> and the strong metal-support interaction between TiO<sub>2</sub> and Pt, Pt/(TiO<sub>2</sub>-NC)<sub>HA</sub> catalysts exhibited stronger resistance to CO<sub>ads</sub> poisoning than commercial JM-Pt/C catalysts, thus showing more excellent catalytic activity and stability.</p></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":null,"pages":null},"PeriodicalIF":4.7000,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1388248123002230/pdfft?md5=b9f8f5aee3d1fe28ac1d1ce8d9727ebc&pid=1-s2.0-S1388248123002230-main.pdf","citationCount":"0","resultStr":"{\"title\":\"MOFs-derived TiO2 on N-doped carbon materials with high concentration of oxygen vacancies as Pt supports and co-catalysts for methanol electrooxidation\",\"authors\":\"Yuelei Si , Zhuo Zhang , Yaxiong Ji\",\"doi\":\"10.1016/j.elecom.2023.107648\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>MIL-125(Ti)–NH<sub>2</sub> was pyrolyzed in N<sub>2</sub> and H<sub>2</sub>/Ar gas to prepare N-doped carbon materials containing TiO<sub>2</sub> (TiO<sub>2</sub>-NC). XPS, ESR and Raman spectra analysis showed that higher concentration of oxygen vacancies were created on the surface of TiO<sub>2</sub> in H<sub>2</sub>/Ar gas, which provided more anchor sites for the nucleation of Pt and enhanced the interaction between Pt and TiO<sub>2</sub>. Therefore, the mass activity/specific activity of Pt/(TiO<sub>2</sub>-NC)<sub>HA</sub> catalysts for methanol oxidation was 510.7 mA mg<sup>−1</sup><sub>Pt</sub>/2.84 mA cm<sup>−2</sup><sub>Pt</sub>, which was 3.1/1.4 times that of Pt/(TiO<sub>2</sub>-NC)<sub>N</sub> catalysts. Due to the enriched OH<sub>ads</sub> on the suface of TiO<sub>2</sub> and the strong metal-support interaction between TiO<sub>2</sub> and Pt, Pt/(TiO<sub>2</sub>-NC)<sub>HA</sub> catalysts exhibited stronger resistance to CO<sub>ads</sub> poisoning than commercial JM-Pt/C catalysts, thus showing more excellent catalytic activity and stability.</p></div>\",\"PeriodicalId\":304,\"journal\":{\"name\":\"Electrochemistry Communications\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.7000,\"publicationDate\":\"2023-12-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S1388248123002230/pdfft?md5=b9f8f5aee3d1fe28ac1d1ce8d9727ebc&pid=1-s2.0-S1388248123002230-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Electrochemistry Communications\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1388248123002230\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ELECTROCHEMISTRY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrochemistry Communications","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1388248123002230","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ELECTROCHEMISTRY","Score":null,"Total":0}
MOFs-derived TiO2 on N-doped carbon materials with high concentration of oxygen vacancies as Pt supports and co-catalysts for methanol electrooxidation
MIL-125(Ti)–NH2 was pyrolyzed in N2 and H2/Ar gas to prepare N-doped carbon materials containing TiO2 (TiO2-NC). XPS, ESR and Raman spectra analysis showed that higher concentration of oxygen vacancies were created on the surface of TiO2 in H2/Ar gas, which provided more anchor sites for the nucleation of Pt and enhanced the interaction between Pt and TiO2. Therefore, the mass activity/specific activity of Pt/(TiO2-NC)HA catalysts for methanol oxidation was 510.7 mA mg−1Pt/2.84 mA cm−2Pt, which was 3.1/1.4 times that of Pt/(TiO2-NC)N catalysts. Due to the enriched OHads on the suface of TiO2 and the strong metal-support interaction between TiO2 and Pt, Pt/(TiO2-NC)HA catalysts exhibited stronger resistance to COads poisoning than commercial JM-Pt/C catalysts, thus showing more excellent catalytic activity and stability.
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Electrochemistry Communications is an open access journal providing fast dissemination of short communications, full communications and mini reviews covering the whole field of electrochemistry which merit urgent publication. Short communications are limited to a maximum of 20,000 characters (including spaces) while full communications and mini reviews are limited to 25,000 characters (including spaces). Supplementary information is permitted for full communications and mini reviews but not for short communications. We aim to be the fastest journal in electrochemistry for these types of papers.
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