Seeded growth of PdPtAg-on-Au heterogeneous nanoplates for efficient methanol oxidation Reaction: Interface engineering in quaternary metallic electrocatalysts

IF 5.9 3区 材料科学 Q2 CHEMISTRY, PHYSICAL FlatChem Pub Date : 2024-05-21 DOI:10.1016/j.flatc.2024.100674
Yuanyuan Min , Na Zhao , Yingying Wang , Yanyun Ma , Yiqun Zheng
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Abstract

Interface engineering plays a critical role in the development of high-efficient fuel cell catalysts, as the interfaces across different components can synergistically and substantially accelerate electrocatalysis kinetics, together with improvement in mass transfer and structural stability. In this study, we report a feasible strategy to create PdPtAg-on-Au heterogenous nanoplates (PdPtAg-on-Au HNPs) and validate their structural advantages in electrocatalysis. By limiting the doping of Au nanoplates with Pt/Ag atoms on the surface and subsequently depositing Pd nanodots in a highly scattered pattern, abundant multimetallic interfaces form and enhance the methanol oxidation reaction (MOR) electrocatalytic process. The optimized PdPtAg-on-Au HNPs/C electrocatalysts exhibited superior mass activity, improved reaction kinetics, and long-term durability compared to commercial Pt/C. DFT simulations suggest that the chemical surrounding of the Pd/Pt catalytic active center with AuAg atoms can lower the reaction barrier and CO binding affinity. This work provides a feasible synthetic strategy for preparing multimetallic fuel cell electrocatalysts with advanced control over heterogeneous structures, highlighting the potential of interface engineering in the rational design of electrocatalysts.

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用于高效甲醇氧化的 PdPtAg-on-Au 异质纳米板的种子生长 反应:季金属电催化剂的界面工程
界面工程在高效燃料电池催化剂的开发中起着至关重要的作用,因为不同组分之间的界面可以协同作用,大大加快电催化动力学,同时改善传质和结构稳定性。在本研究中,我们报告了一种制造 PdPtAg-on-Au 异质纳米板(PdPtAg-on-Au HNPs)的可行策略,并验证了其在电催化中的结构优势。通过限制铂/银原子在金纳米板表面的掺杂,然后以高度分散的方式沉积钯纳米点,形成了丰富的多金属界面,增强了甲醇氧化反应(MOR)的电催化过程。与商用 Pt/C 相比,优化的 PdPtAg-on-Au HNPs/C 电催化剂表现出更高的质量活性、更好的反应动力学和长期耐久性。DFT 模拟表明,Pd/Pt 催化活性中心与 AuAg 原子的化学环绕可以降低反应障碍和 CO 结合亲和力。这项工作为制备多金属燃料电池电催化剂提供了一种可行的合成策略,并对异质结构进行了先进的控制,凸显了界面工程在合理设计电催化剂方面的潜力。
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来源期刊
FlatChem
FlatChem Multiple-
CiteScore
8.40
自引率
6.50%
发文量
104
审稿时长
26 days
期刊介绍: FlatChem - Chemistry of Flat Materials, a new voice in the community, publishes original and significant, cutting-edge research related to the chemistry of graphene and related 2D & layered materials. The overall aim of the journal is to combine the chemistry and applications of these materials, where the submission of communications, full papers, and concepts should contain chemistry in a materials context, which can be both experimental and/or theoretical. In addition to original research articles, FlatChem also offers reviews, minireviews, highlights and perspectives on the future of this research area with the scientific leaders in fields related to Flat Materials. Topics of interest include, but are not limited to, the following: -Design, synthesis, applications and investigation of graphene, graphene related materials and other 2D & layered materials (for example Silicene, Germanene, Phosphorene, MXenes, Boron nitride, Transition metal dichalcogenides) -Characterization of these materials using all forms of spectroscopy and microscopy techniques -Chemical modification or functionalization and dispersion of these materials, as well as interactions with other materials -Exploring the surface chemistry of these materials for applications in: Sensors or detectors in electrochemical/Lab on a Chip devices, Composite materials, Membranes, Environment technology, Catalysis for energy storage and conversion (for example fuel cells, supercapacitors, batteries, hydrogen storage), Biomedical technology (drug delivery, biosensing, bioimaging)
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