MRI-Visualized Aqueous Microenvironment Engineering in 3D Hierarchical FePt Catalysts with Macroporous Architecture for Alkaline Hydrogen Evolution.

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-07-23 DOI:10.1021/acs.nanolett.5c02839

Ruili Wang,Mengmeng Li,Xuefei Sun,Qianrui Lv,Xiuyu Wang,Li Yao

{"title":"MRI-Visualized Aqueous Microenvironment Engineering in 3D Hierarchical FePt Catalysts with Macroporous Architecture for Alkaline Hydrogen Evolution.","authors":"Ruili Wang,Mengmeng Li,Xuefei Sun,Qianrui Lv,Xiuyu Wang,Li Yao","doi":"10.1021/acs.nanolett.5c02839","DOIUrl":null,"url":null,"abstract":"Electrolytic water splitting is a promising strategy for sustainable hydrogen production, yet the alkaline hydrogen evolution reaction (HER) faces kinetic bottlenecks: high water dissociation energy and weak water adsorption. Herein, we first designed a model micrometer-scale 3D hierarchical FePt catalyst (FePt@3D) system with architecturally tailored supports to amplify interfacial water-catalyst interactions while matching the spatial resolution of magnetic resonance imaging (MRI). Spatiotemporally resolved T2-weighted imaging (T2-WI) revealed that FePt@MP-3D performed water enrichment by 28% through capillary forces and increased tortuosity, corresponding to a low overpotential of 13.8 mV at 10 mA cm-2, surpassing commercial Pt/C (η10 = 14.4 mV). This work establishes MRI as a transformative tool to map spatiotemporal distribution of water molecules at catalytic interfaces, bridging macroscopic water distribution with nanoscale catalytic activity. It is clearly shown that MRI provides a powerful tool for probing the other electrocatalytic reactions (e.g., CO2RR, ORR), where water/ion transfer governs performance.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"10 1","pages":""},"PeriodicalIF":9.1000,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano Letters","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1021/acs.nanolett.5c02839","RegionNum":1,"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

Electrolytic water splitting is a promising strategy for sustainable hydrogen production, yet the alkaline hydrogen evolution reaction (HER) faces kinetic bottlenecks: high water dissociation energy and weak water adsorption. Herein, we first designed a model micrometer-scale 3D hierarchical FePt catalyst (FePt@3D) system with architecturally tailored supports to amplify interfacial water-catalyst interactions while matching the spatial resolution of magnetic resonance imaging (MRI). Spatiotemporally resolved T2-weighted imaging (T2-WI) revealed that FePt@MP-3D performed water enrichment by 28% through capillary forces and increased tortuosity, corresponding to a low overpotential of 13.8 mV at 10 mA cm-2, surpassing commercial Pt/C (η10 = 14.4 mV). This work establishes MRI as a transformative tool to map spatiotemporal distribution of water molecules at catalytic interfaces, bridging macroscopic water distribution with nanoscale catalytic activity. It is clearly shown that MRI provides a powerful tool for probing the other electrocatalytic reactions (e.g., CO2RR, ORR), where water/ion transfer governs performance.

查看原文本刊更多论文

具有大孔结构的三维分层FePt催化剂的核磁共振可视化水微环境工程

电解水分解是一种很有前途的可持续制氢策略，但碱性析氢反应（HER）存在水解离能高、水吸附能力弱的动力学瓶颈。在此，我们首先设计了一个微米尺度的三维分层FePt催化剂（FePt@3D）系统模型，该系统具有定制的结构支撑，以放大界面水-催化剂相互作用，同时匹配磁共振成像（MRI）的空间分辨率。时空分辨t2加权成像（T2-WI）显示FePt@MP-3D通过毛细力富集了28%的水，并增加了扭曲度，对应于10 mA cm-2下13.8 mV的低过电位，超过了商用Pt/C （τ 10 = 14.4 mV）。这项工作确立了MRI作为一种变革性工具来绘制水分子在催化界面的时空分布，将宏观水分布与纳米级催化活性联系起来。这清楚地表明，MRI为探测其他电催化反应（例如，CO2RR， ORR）提供了强大的工具，其中水/离子转移决定了性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.