Ze-En Zhou
(, ), Yi Lu
(, ), Yi-Xuan Liu
(, ), Shang Cao
(, ), Ge Tian
(, ), Zhi-Yi Hu
(, ), Ling Shen
(, ), Si-Ming Wu
(, ), Jie Ying
(, ), Wei Geng
(, ), Xiao-Yu Yang
(, )
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In the presence of the magnetic field, oxygen evolution reaction occurs with a high photocurrent density of 0.86 mA cm<sup>−2</sup> at 1.23 V versus V<sub>RHE</sub>, and an applied bias photon-to-current efficiency of 0.342% at 0.61 V<sub>RHE</sub>. Moreover, the photoanode maintains its oxygen evolution reaction for more than 400 h with photocurrent decays by <i>ca.</i> 10%. Observations made in this effort show that the enhancement of photo-electrocatalytic efficiency by a magnetic field is a consequence of the effect of the Lorentz force generated by the magnetic field on photogenerated carriers and ions near the Co<sub>3</sub>O<sub>4</sub>/TiO<sub>2</sub> photoanode, which improves the carrier separation efficiency and the bubble release rate. The results suggest that manipulating photoelectrode carriers by using a magnetic field is a promising strategy to design high-performance photoelectrochemical for water splitting.</p></div>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":"67 10","pages":"3167 - 3175"},"PeriodicalIF":6.8000,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Magnetic field-enhanced photoelectrochemical water splitting of Co3O4/TiO2 for efficient oxygen evolution\",\"authors\":\"Ze-En Zhou \\n (, ), Yi Lu \\n (, ), Yi-Xuan Liu \\n (, ), Shang Cao \\n (, ), Ge Tian \\n (, ), Zhi-Yi Hu \\n (, ), Ling Shen \\n (, ), Si-Ming Wu \\n (, ), Jie Ying \\n (, ), Wei Geng \\n (, ), Xiao-Yu Yang \\n (, )\",\"doi\":\"10.1007/s40843-024-3029-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Effective separation of photogenerated carriers plays a vital role in governing the efficiency of photo-electrocatalytic reactions. However, the advancement in enhancing the intrinsic carrier separation efficiency of semiconductors has shown limited progress. Herein, we reported the use of a magnetic field to improve the photoelectrochemical water splitting of a magnetic Co<sub>3</sub>O<sub>4</sub>/TiO<sub>2</sub> photoanode by boosting the photogenerated carrier separation efficiency. In the presence of the magnetic field, oxygen evolution reaction occurs with a high photocurrent density of 0.86 mA cm<sup>−2</sup> at 1.23 V versus V<sub>RHE</sub>, and an applied bias photon-to-current efficiency of 0.342% at 0.61 V<sub>RHE</sub>. Moreover, the photoanode maintains its oxygen evolution reaction for more than 400 h with photocurrent decays by <i>ca.</i> 10%. Observations made in this effort show that the enhancement of photo-electrocatalytic efficiency by a magnetic field is a consequence of the effect of the Lorentz force generated by the magnetic field on photogenerated carriers and ions near the Co<sub>3</sub>O<sub>4</sub>/TiO<sub>2</sub> photoanode, which improves the carrier separation efficiency and the bubble release rate. The results suggest that manipulating photoelectrode carriers by using a magnetic field is a promising strategy to design high-performance photoelectrochemical for water splitting.</p></div>\",\"PeriodicalId\":773,\"journal\":{\"name\":\"Science China Materials\",\"volume\":\"67 10\",\"pages\":\"3167 - 3175\"},\"PeriodicalIF\":6.8000,\"publicationDate\":\"2024-08-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Science China Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s40843-024-3029-5\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Science China Materials","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s40843-024-3029-5","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Magnetic field-enhanced photoelectrochemical water splitting of Co3O4/TiO2 for efficient oxygen evolution
Effective separation of photogenerated carriers plays a vital role in governing the efficiency of photo-electrocatalytic reactions. However, the advancement in enhancing the intrinsic carrier separation efficiency of semiconductors has shown limited progress. Herein, we reported the use of a magnetic field to improve the photoelectrochemical water splitting of a magnetic Co3O4/TiO2 photoanode by boosting the photogenerated carrier separation efficiency. In the presence of the magnetic field, oxygen evolution reaction occurs with a high photocurrent density of 0.86 mA cm−2 at 1.23 V versus VRHE, and an applied bias photon-to-current efficiency of 0.342% at 0.61 VRHE. Moreover, the photoanode maintains its oxygen evolution reaction for more than 400 h with photocurrent decays by ca. 10%. Observations made in this effort show that the enhancement of photo-electrocatalytic efficiency by a magnetic field is a consequence of the effect of the Lorentz force generated by the magnetic field on photogenerated carriers and ions near the Co3O4/TiO2 photoanode, which improves the carrier separation efficiency and the bubble release rate. The results suggest that manipulating photoelectrode carriers by using a magnetic field is a promising strategy to design high-performance photoelectrochemical for water splitting.
期刊介绍：
Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.
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