PtAuPd/C纳米多主元素合金催化剂对氧还原反应的电催化活性

IF 2.9 3区化学 Q3 CHEMISTRY, PHYSICAL

Physical Chemistry Chemical Physics Pub Date : 2025-06-20 DOI:10.1039/d5cp01935d

Hui Li, Zhiwei Zhang, Lianke Zhang, Hualiang Ni, Haiying Qin, Jing Zhang, Hong Zhong Chi, Jun-Jing He

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引用次数: 0

摘要

开发高稳定性、低铂电催化剂对于推进燃料电池技术至关重要。本研究采用碳热冲击法制备了PtAuPd/C纳米多主元素合金催化剂。PtAuPd/C合金纳米颗粒的平均粒径约为2.2 nm，与二元合金催化剂（pttau /C和PtPd/C）相比，PtAuPd/C对氧还原反应（ORR）表现出更好的催化活性和稳定性。PtAuPd/C的半波电位（E1/2）为0.837 V， Tafel斜率为53.1 mV / dec。在40000次循环后，它显示只有3.5 mV的最小E1/2损耗和78.2%的质量活性保持率。当PtAuPd/C催化剂用作直接硼氢化物燃料电池的阴极催化剂时，其最大功率密度为438.3 mW cm-2。这种改善的ORR活性归因于PtAuPd纳米合金内部的协同电子效应和表面应变的改变。

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Electrocatalytic Activity of PtAuPd/C Nano Multi-Principal Element Alloy Catalyst towards Oxygen Reduction Reaction

Developing highly stable, low-platinum electrocatalysts is crucial for advancing fuel cell technology. In this study, a PtAuPd/C nano multi-principal element alloy catalyst was synthesized by a carbothermal shock method. The average particle size of the PtAuPd/C alloy nanoparticles is around 2.2 nm and the PtAuPd/C exhibits superior catalytic activity and stability towards the oxygen reduction reaction (ORR) compared to the binary alloy catalysts (PtAu/C and PtPd/C). The PtAuPd/C displays a half-wave potential (E1/2) of 0.837 V and a Tafel slope of 53.1 mV dec-1. It demonstrates only a minimal E1/2 loss of 3.5 mV after 40,000 cycles and a mass activity retention rate of 78.2%. When employed as a cathode catalyst within a direct borohydride fuel cell, the PtAuPd/C catalyst exhibits a maximum power density of 438.3 mW cm-2. This improved ORR activity is attributed to synergistic electronic effects and modified surface strain within the PtAuPd nanoalloy.

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来源期刊

Physical Chemistry Chemical Physics 化学-物理：原子、分子和化学物理

CiteScore

5.50

自引率

9.10%

发文量

2675

审稿时长

2.0 months

期刊介绍： Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.