Heekwon Lee, Jesús Alberto Muñoz-Castañeda and Hang Ren
{"title":"Facet-controlled electrosynthesis of nanoparticles by combinatorial screening in scanning electrochemical cell microscopy†","authors":"Heekwon Lee, Jesús Alberto Muñoz-Castañeda and Hang Ren","doi":"10.1039/D4NR04564E","DOIUrl":null,"url":null,"abstract":"<p >Controlled synthesis of faceted nanoparticles on surfaces without explicit use of ligands has gained attention due to their promising applications in electrocatalysis and chemical sensing. Electrodeposition is a desirable method; however, precise control over their size, spatial distribution, and morphology requires extensive optimization. Here, we report the spatially resolved synthesis of shape-controlled Pt nanoparticles and fast screening of synthesis conditions in scanning electrochemical cell microscopy (SECCM) with pulse potentials. The screening is performed on isolated ∼μm<small><sup>2</sup></small> areas in SECCM, enabling multiple experimental conditions to be evaluated in a single mapping experiment. The screening reveals that the formation of (100) facets in Pt nanoparticles is sensitive to the upper and lower potential limits of the square-wave potential pulse. The facet selectivity is attributed to a facet-dependent migration effect influenced by the concurrent hydrogen evolution reaction during Pt deposition. Moreover, the density and size of nanoparticles can be controlled. This approach offers a pathway toward automated synthesis and characterization of faceted metallic nanoparticles, providing opportunities for advancements in electrocatalysis and sensor development.</p>","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":" 9","pages":" 5141-5149"},"PeriodicalIF":5.8000,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/nr/d4nr04564e?page=search","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nanoscale","FirstCategoryId":"88","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/nr/d4nr04564e","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Controlled synthesis of faceted nanoparticles on surfaces without explicit use of ligands has gained attention due to their promising applications in electrocatalysis and chemical sensing. Electrodeposition is a desirable method; however, precise control over their size, spatial distribution, and morphology requires extensive optimization. Here, we report the spatially resolved synthesis of shape-controlled Pt nanoparticles and fast screening of synthesis conditions in scanning electrochemical cell microscopy (SECCM) with pulse potentials. The screening is performed on isolated ∼μm2 areas in SECCM, enabling multiple experimental conditions to be evaluated in a single mapping experiment. The screening reveals that the formation of (100) facets in Pt nanoparticles is sensitive to the upper and lower potential limits of the square-wave potential pulse. The facet selectivity is attributed to a facet-dependent migration effect influenced by the concurrent hydrogen evolution reaction during Pt deposition. Moreover, the density and size of nanoparticles can be controlled. This approach offers a pathway toward automated synthesis and characterization of faceted metallic nanoparticles, providing opportunities for advancements in electrocatalysis and sensor development.
期刊介绍:
Nanoscale is a high-impact international journal, publishing high-quality research across nanoscience and nanotechnology. Nanoscale publishes a full mix of research articles on experimental and theoretical work, including reviews, communications, and full papers.Highly interdisciplinary, this journal appeals to scientists, researchers and professionals interested in nanoscience and nanotechnology, quantum materials and quantum technology, including the areas of physics, chemistry, biology, medicine, materials, energy/environment, information technology, detection science, healthcare and drug discovery, and electronics.