{"title":"通过高温烧结提高氧化钨的光阳极活性和最外层表面结晶度","authors":"Toshiyuki Abe, Hideya Tsuchikado, Mitsuharu Chisaka, Takashi Itoh, Guoqing Guan, Abuliti Abudula","doi":"10.1007/s12678-023-00859-2","DOIUrl":null,"url":null,"abstract":"<div><p>Tungsten oxide (WO<sub>3</sub>) is a promising photoanode material capable of water oxidation under visible-light irradiation. Although WO<sub>3</sub> is usually prepared via sintering at 500 °C–550˚C, this work shows that high-temperature sintering (i.e., at 600 °C) can lead to efficient output at the WO<sub>3</sub> photoanode. The material characteristics such as the crystal system, surface structure, film thickness, and optical properties were essentially independent of the sintering temperatures employed. However, the high-temperature-sintered WO<sub>3</sub> showed low charge transfer resistance at the electrode–electrolyte interface, resulting in improved charge injection efficiency for water oxidation at the WO<sub>3</sub> photoanode. WO<sub>3</sub> sintered at 550 °C and 600 °C showed the similar visible Raman spectra with strong band intensities, indicative of improved crystallinity in WO<sub>3</sub> bulk particularly in the comparison with WO<sub>3</sub> sintered at 450 °C. However, the ultraviolet Raman spectrum exhibited intense bands for only the WO<sub>3</sub> prepared at 600 °C, indicating the enhanced crystallization of the WO<sub>3</sub> outermost surface. Thus, the high crystallinity in the WO<sub>3</sub> bulk and at its surface results in efficient photoanodic output owing to the suppression of electron–hole recombination.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"15 1","pages":"120 - 127"},"PeriodicalIF":2.7000,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhanced Photoanodic Activity and Outermost Surface Crystallinity of Tungsten Oxide via High-temperature Sintering\",\"authors\":\"Toshiyuki Abe, Hideya Tsuchikado, Mitsuharu Chisaka, Takashi Itoh, Guoqing Guan, Abuliti Abudula\",\"doi\":\"10.1007/s12678-023-00859-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Tungsten oxide (WO<sub>3</sub>) is a promising photoanode material capable of water oxidation under visible-light irradiation. Although WO<sub>3</sub> is usually prepared via sintering at 500 °C–550˚C, this work shows that high-temperature sintering (i.e., at 600 °C) can lead to efficient output at the WO<sub>3</sub> photoanode. The material characteristics such as the crystal system, surface structure, film thickness, and optical properties were essentially independent of the sintering temperatures employed. However, the high-temperature-sintered WO<sub>3</sub> showed low charge transfer resistance at the electrode–electrolyte interface, resulting in improved charge injection efficiency for water oxidation at the WO<sub>3</sub> photoanode. WO<sub>3</sub> sintered at 550 °C and 600 °C showed the similar visible Raman spectra with strong band intensities, indicative of improved crystallinity in WO<sub>3</sub> bulk particularly in the comparison with WO<sub>3</sub> sintered at 450 °C. However, the ultraviolet Raman spectrum exhibited intense bands for only the WO<sub>3</sub> prepared at 600 °C, indicating the enhanced crystallization of the WO<sub>3</sub> outermost surface. Thus, the high crystallinity in the WO<sub>3</sub> bulk and at its surface results in efficient photoanodic output owing to the suppression of electron–hole recombination.</p><h3>Graphical Abstract</h3>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":535,\"journal\":{\"name\":\"Electrocatalysis\",\"volume\":\"15 1\",\"pages\":\"120 - 127\"},\"PeriodicalIF\":2.7000,\"publicationDate\":\"2023-12-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Electrocatalysis\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s12678-023-00859-2\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrocatalysis","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s12678-023-00859-2","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Enhanced Photoanodic Activity and Outermost Surface Crystallinity of Tungsten Oxide via High-temperature Sintering
Tungsten oxide (WO3) is a promising photoanode material capable of water oxidation under visible-light irradiation. Although WO3 is usually prepared via sintering at 500 °C–550˚C, this work shows that high-temperature sintering (i.e., at 600 °C) can lead to efficient output at the WO3 photoanode. The material characteristics such as the crystal system, surface structure, film thickness, and optical properties were essentially independent of the sintering temperatures employed. However, the high-temperature-sintered WO3 showed low charge transfer resistance at the electrode–electrolyte interface, resulting in improved charge injection efficiency for water oxidation at the WO3 photoanode. WO3 sintered at 550 °C and 600 °C showed the similar visible Raman spectra with strong band intensities, indicative of improved crystallinity in WO3 bulk particularly in the comparison with WO3 sintered at 450 °C. However, the ultraviolet Raman spectrum exhibited intense bands for only the WO3 prepared at 600 °C, indicating the enhanced crystallization of the WO3 outermost surface. Thus, the high crystallinity in the WO3 bulk and at its surface results in efficient photoanodic output owing to the suppression of electron–hole recombination.
期刊介绍：
Electrocatalysis is cross-disciplinary in nature, and attracts the interest of chemists, physicists, biochemists, surface and materials scientists, and engineers. Electrocatalysis provides the unique international forum solely dedicated to the exchange of novel ideas in electrocatalysis for academic, government, and industrial researchers. Quick publication of new results, concepts, and inventions made involving Electrocatalysis stimulates scientific discoveries and breakthroughs, promotes the scientific and engineering concepts that are critical to the development of novel electrochemical technologies.
Electrocatalysis publishes original submissions in the form of letters, research papers, review articles, book reviews, and educational papers. Letters are preliminary reports that communicate new and important findings. Regular research papers are complete reports of new results, and their analysis and discussion. Review articles critically and constructively examine development in areas of electrocatalysis that are of broad interest and importance. Educational papers discuss important concepts whose understanding is vital to advances in theoretical and experimental aspects of electrochemical reactions.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
