Dynamic Ionic Environment Modulation for Precise Electrosynthesis of Heterostructured Bimetallic Nanoparticles
Abstract Bimetallic heterostructures, including core–shell and Janus configurations, often offer unique electrocatalytic properties compared to monometallic nanoparticles. However, achieving precise control over both elemental composition and spatial arrangement within these structures remains a cha...
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| Format: | Article |
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Wiley
2025-05-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202415727 |
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| author | Heekwon Lee Xun Zhan Jamie H. Warner Hang Ren |
| author_facet | Heekwon Lee Xun Zhan Jamie H. Warner Hang Ren |
| author_sort | Heekwon Lee |
| collection | DOAJ |
| description | Abstract Bimetallic heterostructures, including core–shell and Janus configurations, often offer unique electrocatalytic properties compared to monometallic nanoparticles. However, achieving precise control over both elemental composition and spatial arrangement within these structures remains a challenge. Here, an electrosynthesis method is introduced that enables the fabrication of heterostructured bimetallic nanoparticles with precise, independent control of their elemental distribution. By leveraging dual‐channel scanning electrochemical cell microscopy (SECCM), the local ionic environment is dynamically modulated in situ, adjusting the deposition bias between channels to achieve selective electrodeposition. This approach allows temporal control over the solution conditions within the SECCM droplet, facilitating the synthesis of multi‐layer core–shell nanoparticles with tunable thickness, number, and sequence of layers. This technique is demonstrated with Pt–Cu and Pt–Ni systems, synthesizing arrays of Cu@Pt and Pt@Cu core–shell structures, which are then screened for catalytic activity in hydrogen evolution (HER) and oxygen reduction (ORR) reactions. The high spatial resolution and on‐demand control over the composition and structure make this method well‐suitable for creating arrays of complex, multi‐metallic heterostructures, which is expected to accelerate the discovery of advanced electrocatalytic materials, offering a platform for efficient and scalable electrocatalyst screening. |
| format | Article |
| id | doaj-art-1a62a5c5c2ff4f139336bcf4387a75c5 |
| institution | OA Journals |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-1a62a5c5c2ff4f139336bcf4387a75c52025-08-20T02:28:15ZengWileyAdvanced Science2198-38442025-05-011217n/an/a10.1002/advs.202415727Dynamic Ionic Environment Modulation for Precise Electrosynthesis of Heterostructured Bimetallic NanoparticlesHeekwon Lee0Xun Zhan1Jamie H. Warner2Hang Ren3Department of Chemistry The University of Texas at Austin Austin Texas 78712 USATexas Materials Institute The University of Texas at Austin Austin Texas 78712 USATexas Materials Institute The University of Texas at Austin Austin Texas 78712 USADepartment of Chemistry The University of Texas at Austin Austin Texas 78712 USAAbstract Bimetallic heterostructures, including core–shell and Janus configurations, often offer unique electrocatalytic properties compared to monometallic nanoparticles. However, achieving precise control over both elemental composition and spatial arrangement within these structures remains a challenge. Here, an electrosynthesis method is introduced that enables the fabrication of heterostructured bimetallic nanoparticles with precise, independent control of their elemental distribution. By leveraging dual‐channel scanning electrochemical cell microscopy (SECCM), the local ionic environment is dynamically modulated in situ, adjusting the deposition bias between channels to achieve selective electrodeposition. This approach allows temporal control over the solution conditions within the SECCM droplet, facilitating the synthesis of multi‐layer core–shell nanoparticles with tunable thickness, number, and sequence of layers. This technique is demonstrated with Pt–Cu and Pt–Ni systems, synthesizing arrays of Cu@Pt and Pt@Cu core–shell structures, which are then screened for catalytic activity in hydrogen evolution (HER) and oxygen reduction (ORR) reactions. The high spatial resolution and on‐demand control over the composition and structure make this method well‐suitable for creating arrays of complex, multi‐metallic heterostructures, which is expected to accelerate the discovery of advanced electrocatalytic materials, offering a platform for efficient and scalable electrocatalyst screening.https://doi.org/10.1002/advs.202415727bimetalelectrodepositionheterostructurenanoparticlesscanning electrochemical cell microscopy |
| spellingShingle | Heekwon Lee Xun Zhan Jamie H. Warner Hang Ren Dynamic Ionic Environment Modulation for Precise Electrosynthesis of Heterostructured Bimetallic Nanoparticles Advanced Science bimetal electrodeposition heterostructure nanoparticles scanning electrochemical cell microscopy |
| title | Dynamic Ionic Environment Modulation for Precise Electrosynthesis of Heterostructured Bimetallic Nanoparticles |
| title_full | Dynamic Ionic Environment Modulation for Precise Electrosynthesis of Heterostructured Bimetallic Nanoparticles |
| title_fullStr | Dynamic Ionic Environment Modulation for Precise Electrosynthesis of Heterostructured Bimetallic Nanoparticles |
| title_full_unstemmed | Dynamic Ionic Environment Modulation for Precise Electrosynthesis of Heterostructured Bimetallic Nanoparticles |
| title_short | Dynamic Ionic Environment Modulation for Precise Electrosynthesis of Heterostructured Bimetallic Nanoparticles |
| title_sort | dynamic ionic environment modulation for precise electrosynthesis of heterostructured bimetallic nanoparticles |
| topic | bimetal electrodeposition heterostructure nanoparticles scanning electrochemical cell microscopy |
| url | https://doi.org/10.1002/advs.202415727 |
| work_keys_str_mv | AT heekwonlee dynamicionicenvironmentmodulationforpreciseelectrosynthesisofheterostructuredbimetallicnanoparticles AT xunzhan dynamicionicenvironmentmodulationforpreciseelectrosynthesisofheterostructuredbimetallicnanoparticles AT jamiehwarner dynamicionicenvironmentmodulationforpreciseelectrosynthesisofheterostructuredbimetallicnanoparticles AT hangren dynamicionicenvironmentmodulationforpreciseelectrosynthesisofheterostructuredbimetallicnanoparticles |