Surin Saipanya, Satit Phiyanalinmat, Paralee Waenkaew, Li Fang, Jaroon Jakmunee and Suwaphid Themsirimongkon
{"title":"TiO25CuxNi修饰氧化石墨烯†上电沉积Pt对醇氧化的催化增强作用","authors":"Surin Saipanya, Satit Phiyanalinmat, Paralee Waenkaew, Li Fang, Jaroon Jakmunee and Suwaphid Themsirimongkon","doi":"10.1039/D5NJ00132C","DOIUrl":null,"url":null,"abstract":"<p >A study was conducted to investigate the performance of various catalysts, including electrodeposited platinum (Pt), metal oxides (<em>e.g.</em>, TiO<small><sub>2</sub></small>5Cu<em>x</em>Ni), and graphene oxide (GO), for the electro-oxidation of alcohols (<em>e.g.</em>, methanol, ethanol, and <em>n</em>-propanol) in acidic media. The catalysts were synthesized as GO–TiO<small><sub>2</sub></small>5Cu<em>x</em>Ni/Pt composites, where <em>x</em> represents the nickel (Ni) content in weight percent (wt%) relative to TiO<small><sub>2</sub></small>, with values of 3, 5, and 15. These composites were characterized using X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Electrochemical performance was assessed through cyclic voltammetry (CV), linear sweep voltammetry (LSV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS). The prepared GO–TiO<small><sub>2</sub></small>5Cu<em>x</em>Ni/Pt catalyst composites exhibited higher activity compared to the GO/Pt catalyst. The presence of a coexisting phase structure comprising metals (Ni, Cu, and Ti) in oxides and the GO support, along with electrodeposited Pt nanoparticles, facilitated efficient electron transport, which is advantageous for electrocatalytic performance. The prepared catalysts demonstrated high mass activity and low onset potential, and their kinetic characteristics revealed small Tafel slopes and low charge transfer resistance. Slight variations in the mechanistic performance for the oxidation of alcohols were observed, highlighting the influence of the alcohol molecular weight on catalytic reactivity. Among the catalysts studied, the GO–TiO<small><sub>2</sub></small>5Cu15Ni/Pt composite with ternary metal oxides exhibited the highest activity for alcohol electro-oxidation, with the following order of current intensity: ethanol > methanol > <em>n</em>-propanol. In conclusion, the GO–TiO<small><sub>2</sub></small>5Cu15Ni/Pt catalyst composite nanoparticles demonstrated superior catalytic performance among the catalysts evaluated, suggesting its potential for application in direct alcohol fuel cells.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":" 18","pages":" 7435-7450"},"PeriodicalIF":2.5000,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Catalytic enhancement for alcohol oxidation by electrodeposited Pt on TiO25CuxNi modified graphene oxide†\",\"authors\":\"Surin Saipanya, Satit Phiyanalinmat, Paralee Waenkaew, Li Fang, Jaroon Jakmunee and Suwaphid Themsirimongkon\",\"doi\":\"10.1039/D5NJ00132C\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >A study was conducted to investigate the performance of various catalysts, including electrodeposited platinum (Pt), metal oxides (<em>e.g.</em>, TiO<small><sub>2</sub></small>5Cu<em>x</em>Ni), and graphene oxide (GO), for the electro-oxidation of alcohols (<em>e.g.</em>, methanol, ethanol, and <em>n</em>-propanol) in acidic media. The catalysts were synthesized as GO–TiO<small><sub>2</sub></small>5Cu<em>x</em>Ni/Pt composites, where <em>x</em> represents the nickel (Ni) content in weight percent (wt%) relative to TiO<small><sub>2</sub></small>, with values of 3, 5, and 15. These composites were characterized using X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Electrochemical performance was assessed through cyclic voltammetry (CV), linear sweep voltammetry (LSV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS). The prepared GO–TiO<small><sub>2</sub></small>5Cu<em>x</em>Ni/Pt catalyst composites exhibited higher activity compared to the GO/Pt catalyst. The presence of a coexisting phase structure comprising metals (Ni, Cu, and Ti) in oxides and the GO support, along with electrodeposited Pt nanoparticles, facilitated efficient electron transport, which is advantageous for electrocatalytic performance. The prepared catalysts demonstrated high mass activity and low onset potential, and their kinetic characteristics revealed small Tafel slopes and low charge transfer resistance. Slight variations in the mechanistic performance for the oxidation of alcohols were observed, highlighting the influence of the alcohol molecular weight on catalytic reactivity. Among the catalysts studied, the GO–TiO<small><sub>2</sub></small>5Cu15Ni/Pt composite with ternary metal oxides exhibited the highest activity for alcohol electro-oxidation, with the following order of current intensity: ethanol > methanol > <em>n</em>-propanol. In conclusion, the GO–TiO<small><sub>2</sub></small>5Cu15Ni/Pt catalyst composite nanoparticles demonstrated superior catalytic performance among the catalysts evaluated, suggesting its potential for application in direct alcohol fuel cells.</p>\",\"PeriodicalId\":95,\"journal\":{\"name\":\"New Journal of Chemistry\",\"volume\":\" 18\",\"pages\":\" 7435-7450\"},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2025-04-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"New Journal of Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2025/nj/d5nj00132c\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"New Journal of Chemistry","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/nj/d5nj00132c","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Catalytic enhancement for alcohol oxidation by electrodeposited Pt on TiO25CuxNi modified graphene oxide†
A study was conducted to investigate the performance of various catalysts, including electrodeposited platinum (Pt), metal oxides (e.g., TiO25CuxNi), and graphene oxide (GO), for the electro-oxidation of alcohols (e.g., methanol, ethanol, and n-propanol) in acidic media. The catalysts were synthesized as GO–TiO25CuxNi/Pt composites, where x represents the nickel (Ni) content in weight percent (wt%) relative to TiO2, with values of 3, 5, and 15. These composites were characterized using X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Electrochemical performance was assessed through cyclic voltammetry (CV), linear sweep voltammetry (LSV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS). The prepared GO–TiO25CuxNi/Pt catalyst composites exhibited higher activity compared to the GO/Pt catalyst. The presence of a coexisting phase structure comprising metals (Ni, Cu, and Ti) in oxides and the GO support, along with electrodeposited Pt nanoparticles, facilitated efficient electron transport, which is advantageous for electrocatalytic performance. The prepared catalysts demonstrated high mass activity and low onset potential, and their kinetic characteristics revealed small Tafel slopes and low charge transfer resistance. Slight variations in the mechanistic performance for the oxidation of alcohols were observed, highlighting the influence of the alcohol molecular weight on catalytic reactivity. Among the catalysts studied, the GO–TiO25Cu15Ni/Pt composite with ternary metal oxides exhibited the highest activity for alcohol electro-oxidation, with the following order of current intensity: ethanol > methanol > n-propanol. In conclusion, the GO–TiO25Cu15Ni/Pt catalyst composite nanoparticles demonstrated superior catalytic performance among the catalysts evaluated, suggesting its potential for application in direct alcohol fuel cells.
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