Designed synthesis of multi-defective Ti0.9Cu0.1N@Pt as a robust catalyst for the oxygen reduction reaction†

IF 2.9 3区化学 Q3 CHEMISTRY, PHYSICAL

Physical Chemistry Chemical Physics Pub Date : 2025-03-06 DOI:10.1039/D4CP04380D

Sipeng Chen, Jiquan Lu, Yuying Li, Yuying Zheng and Ting Zhu

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Abstract

Proton-exchange membrane (PEM) fuel cells require cost-effective and robust catalysts capable of withstanding high levels of operation. However, the sluggish cathode oxygen reduction reaction (ORR) and the high cost and instability of the currently used catalysts present significant challenges for the commercialization of PEMFCs. To address these issues, multi-defective Cu-titanium nitride (Ti_0.9Cu_0.1N) nanospheres with a large surface area are synthesized, and then deposited with a thin layer of Pt, forming a Ti_0.9Cu_0.1N@Pt catalyst. Compared to commercial Pt/C catalysts, this Ti_0.9Cu_0.1N@Pt catalyst demonstrates a 53 mV greater half-wave potential in acidic media, indicating its improved ORR performance. Additionally, the Ti_0.9Cu_0.1N@Pt catalyst can maintain a high mass activity retention of 63% after 6000 accelerating cycle tests, whereas commercial Pt/C catalysts lose 70% of their mass activity. These findings indicate the promising potential for developing and implementing a binary nitride support to enhance Pt utilization in the near future.

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设计合成多缺陷Ti0.9Cu0.1N@Pt作为氧还原反应的稳健催化剂

质子交换膜（PEM）燃料电池需要成本效益高且坚固耐用的催化剂，能够承受高水平的运行。然而，阴极氧还原反应（ORR）迟缓、目前使用的催化剂成本高且不稳定，给 PEMFC 的商业化带来了巨大挑战。为了解决这些问题，我们合成了具有大表面积的多缺陷铜-氮化钛（Ti0.9Cu0.1N）纳米球，然后沉积了一薄层铂，形成了 Ti0.9Cu0.1N@Pt 催化剂。与商用 Pt/C 催化剂相比，这种 Ti0.9Cu0.1N@Pt 催化剂在酸性介质中的半波电位提高了 53 mV，表明其 ORR 性能得到了改善。此外，Ti0.9Cu0.1N@Pt 催化剂在经过 6000 次加速循环测试后，质量活性保持率高达 63%，而商用 Pt/C 催化剂的质量活性损失率为 70%。这些研究结果表明，在不久的将来，开发和实施二元氮化物支撑以提高铂的利用率具有广阔的前景。

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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.