{"title":"可见光驱动合成用于电催化氮转化反应的铂铜合金纳米树枝状化合物","authors":"Guoqiang Wang, Chuanjun Wang, Xin Zhao, Shenjie Liu, Geoffrey I. N. Waterhouse, Yining Zhang, Xiaoqing Lv, Chenyang Wang, Xiaojun Lv, Jing Xu","doi":"10.1002/adsu.202400272","DOIUrl":null,"url":null,"abstract":"<p>Hierarchical metal alloy nanostructures with branched morphologies are highly desirable for electrocatalysis due to their large surface area, highly exposed active sites and stability for catalytic reactions. In this work, the successful synthesis of uniformly-sized, spherical Pt–Cu alloy nanodendrites are reported using a novel visible light-driven photoreduction method that exploits fluorescein as an excited state photosensitizer. Factors influencing the structure and morphology of the PtCu alloy nanodendrites are systematically explored, including pH, Pt<sup>4+</sup> and Cu<sup>2+</sup> concentrations, Pt:Cu molar ratio, Light emitting diode (LED) light irradiation time, light intensity, concentration of hexadecyl trimethyl ammonium bromide (CTAB), and concentration of triethylamine (TEA). The experiments reveal a simultaneous photoreduction/galvanic replacement mechanism for PtCu alloy nanodendrite formation. Importantly, the PtCu alloy nanodendrites are easily separable from the reaction solution, facilitating their use as electrocatalysts for the electrocatalytic nitrite reduction reaction (eNO<sub>2</sub>RR) to ammonia and also the nitrogen oxidation reaction (NOR) to nitrate. The PtCu alloy nanodendrites outperforms a commercially available Pt nanoparticle catalyst in both NO<sub>2</sub>RR and NOR, validating the approach.</p>","PeriodicalId":7294,"journal":{"name":"Advanced Sustainable Systems","volume":"8 9","pages":""},"PeriodicalIF":6.5000,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Visible Light-Driven Synthesis of PtCu Alloy Nanodendrites for Electrocatalytic Nitrogen-Conversion Reactions\",\"authors\":\"Guoqiang Wang, Chuanjun Wang, Xin Zhao, Shenjie Liu, Geoffrey I. N. Waterhouse, Yining Zhang, Xiaoqing Lv, Chenyang Wang, Xiaojun Lv, Jing Xu\",\"doi\":\"10.1002/adsu.202400272\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Hierarchical metal alloy nanostructures with branched morphologies are highly desirable for electrocatalysis due to their large surface area, highly exposed active sites and stability for catalytic reactions. In this work, the successful synthesis of uniformly-sized, spherical Pt–Cu alloy nanodendrites are reported using a novel visible light-driven photoreduction method that exploits fluorescein as an excited state photosensitizer. Factors influencing the structure and morphology of the PtCu alloy nanodendrites are systematically explored, including pH, Pt<sup>4+</sup> and Cu<sup>2+</sup> concentrations, Pt:Cu molar ratio, Light emitting diode (LED) light irradiation time, light intensity, concentration of hexadecyl trimethyl ammonium bromide (CTAB), and concentration of triethylamine (TEA). The experiments reveal a simultaneous photoreduction/galvanic replacement mechanism for PtCu alloy nanodendrite formation. Importantly, the PtCu alloy nanodendrites are easily separable from the reaction solution, facilitating their use as electrocatalysts for the electrocatalytic nitrite reduction reaction (eNO<sub>2</sub>RR) to ammonia and also the nitrogen oxidation reaction (NOR) to nitrate. The PtCu alloy nanodendrites outperforms a commercially available Pt nanoparticle catalyst in both NO<sub>2</sub>RR and NOR, validating the approach.</p>\",\"PeriodicalId\":7294,\"journal\":{\"name\":\"Advanced Sustainable Systems\",\"volume\":\"8 9\",\"pages\":\"\"},\"PeriodicalIF\":6.5000,\"publicationDate\":\"2024-06-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advanced Sustainable Systems\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/adsu.202400272\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Sustainable Systems","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/adsu.202400272","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY","Score":null,"Total":0}
Visible Light-Driven Synthesis of PtCu Alloy Nanodendrites for Electrocatalytic Nitrogen-Conversion Reactions
Hierarchical metal alloy nanostructures with branched morphologies are highly desirable for electrocatalysis due to their large surface area, highly exposed active sites and stability for catalytic reactions. In this work, the successful synthesis of uniformly-sized, spherical Pt–Cu alloy nanodendrites are reported using a novel visible light-driven photoreduction method that exploits fluorescein as an excited state photosensitizer. Factors influencing the structure and morphology of the PtCu alloy nanodendrites are systematically explored, including pH, Pt4+ and Cu2+ concentrations, Pt:Cu molar ratio, Light emitting diode (LED) light irradiation time, light intensity, concentration of hexadecyl trimethyl ammonium bromide (CTAB), and concentration of triethylamine (TEA). The experiments reveal a simultaneous photoreduction/galvanic replacement mechanism for PtCu alloy nanodendrite formation. Importantly, the PtCu alloy nanodendrites are easily separable from the reaction solution, facilitating their use as electrocatalysts for the electrocatalytic nitrite reduction reaction (eNO2RR) to ammonia and also the nitrogen oxidation reaction (NOR) to nitrate. The PtCu alloy nanodendrites outperforms a commercially available Pt nanoparticle catalyst in both NO2RR and NOR, validating the approach.
期刊介绍:
Advanced Sustainable Systems, a part of the esteemed Advanced portfolio, serves as an interdisciplinary sustainability science journal. It focuses on impactful research in the advancement of sustainable, efficient, and less wasteful systems and technologies. Aligned with the UN's Sustainable Development Goals, the journal bridges knowledge gaps between fundamental research, implementation, and policy-making. Covering diverse topics such as climate change, food sustainability, environmental science, renewable energy, water, urban development, and socio-economic challenges, it contributes to the understanding and promotion of sustainable systems.