Atomically Dispersed Platinum Supported on Crumpled Graphene Supports for Highly Efficient Hydrogen Evolution Reaction

IF 4.3 3区工程技术 Q2 ENERGY & FUELS

International Journal of Energy Research Pub Date : 2024-11-18 DOI:10.1155/2024/8700573

Wonyoung Lee, Taeyoung Jeong, Kiwon Kim, Jeeyoung Yoo, Joonhee Kang, Byeongyong Lee, Myeongjin Kim

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Abstract

Platinum (Pt) single-atom catalysts (SACs) are a promising alternative to commercial Pt/carbon (C) catalysts because of their tunable catalytic activity with maximum atomic efficiency for the hydrogen evolution reaction (HER). Herein, we report a nitrogen (N)-doped three-dimensional (3D) crumpled graphene-supported Pt SAC (NCG/Pt) that efficiently catalyzes HER under acidic media. The NCG/Pt demonstrates an overpotential of 0.11 V at a current density of 10 mA cm⁻² with a mass activity of 2852.9 A g⁻¹_Pt, highlighting its superior 3.6 times greater hydrogen (H) production capacity compared to Pt/C. Systematically controlled electrochemical characterization together with synchrotron-based X-ray absorption spectroscopy (XAS) and N₂ adsorption–desorption isotherm experiment successfully established the structure–activity relationship, and the enhanced catalytic performance was mainly attributed to the synergistic effect between the Pt-pyridinic N₄ moiety and the crumpled graphene (CG) support. Our work presents a rational approach to designing a highly effective, robust, and efficient electrocatalyst for acidic HER.

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原子分散的铂在皱缩石墨烯载体上实现高效氢气进化反应

铂（Pt）单原子催化剂（SAC）是商用铂/碳（C）催化剂的理想替代品，因为它们在氢进化反应（HER）中具有可调的催化活性和最高的原子效率。在此，我们报告了一种氮（N）掺杂的三维（3D）皱褶石墨烯支撑铂SAC（NCG/Pt），它能在酸性介质中高效催化氢进化反应。在电流密度为 10 mA cm-2 时，NCG/Pt 的过电位为 0.11 V，质量活度为 2852.9 A g-1Pt，与 Pt/C 相比，氢（H）生产能力高出 3.6 倍。系统控制的电化学表征以及同步辐射 X 射线吸收光谱（XAS）和 N2 吸附-脱附等温线实验成功地建立了结构-活性关系，而催化性能的增强主要归功于铂吡啶 N4 分子与皱褶石墨烯（CG）支撑之间的协同效应。我们的研究工作为设计一种高效、稳健、坚固的酸性 HER 电催化剂提供了一种合理的方法。

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来源期刊

International Journal of Energy Research 工程技术-核科学技术

CiteScore

9.80

自引率

8.70%

发文量

1170

审稿时长

3.1 months

期刊介绍： The International Journal of Energy Research (IJER) is dedicated to providing a multidisciplinary, unique platform for researchers, scientists, engineers, technology developers, planners, and policy makers to present their research results and findings in a compelling manner on novel energy systems and applications. IJER covers the entire spectrum of energy from production to conversion, conservation, management, systems, technologies, etc. We encourage papers submissions aiming at better efficiency, cost improvements, more effective resource use, improved design and analysis, reduced environmental impact, and hence leading to better sustainability. IJER is concerned with the development and exploitation of both advanced traditional and new energy sources, systems, technologies and applications. Interdisciplinary subjects in the area of novel energy systems and applications are also encouraged. High-quality research papers are solicited in, but are not limited to, the following areas with innovative and novel contents: -Biofuels and alternatives -Carbon capturing and storage technologies -Clean coal technologies -Energy conversion, conservation and management -Energy storage -Energy systems -Hybrid/combined/integrated energy systems for multi-generation -Hydrogen energy and fuel cells -Hydrogen production technologies -Micro- and nano-energy systems and technologies -Nuclear energy -Renewable energies (e.g. geothermal, solar, wind, hydro, tidal, wave, biomass) -Smart energy system