Two-Dimensional Dual-Mesoporous Catalytic Networks with Coexisting Pt Single Atoms and Clusters for Boosted Oxygen Reduction Reaction

IF 4.2 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemical Communications Pub Date : 2025-09-25 DOI:10.1039/d5cc04617c

Fangzheng Wang, Tie Shu, Runfan Zheng, Yuying Han, Ang Li, Rui Xu, Tao Wang, Chengming Huang, Jing Li, Zidong Wei

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引用次数: 0

Abstract

Single atom-cluster coexisting catalysts offer high oxygen reduction reaction (ORR) potential but often suffer from synthesis complexity and poor scalability. Here, we report a green and scalable molten-salt templating strategy using NaCl to construct a two-dimensional ultrathin mesoporous carbon-supported Pt catalyst (Pt SA-NC /2D-OMCN) via simple calcination and water washing. The catalyst integrates dual mesopores: small mesopores (~3.8 nm) increase active site density, while large mesopores (20-30 nm) enhance mass transport. Combined with nitrogen dopants and edge defects that anchor Pt species, this architecture ensures uniform dispersion and structural stability of Pt single atoms and clusters. Benefiting from this wellengineered dual-mesoporous catalytic networks, Pt SA-NC /2D-OMCN exhibits excellent ORR activity and long-term durability in both three-electrode systems and practical fuel cell tests. This work presents a scalable design strategy for constructing high-performance, low-Pt ORR catalysts, and broadens the application scope of atom-cluster coexisting systems in fuel cell electrocatalysis.

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促进氧还原反应的铂单原子和簇共存的二维双介孔催化网络

单原子簇共存催化剂具有较高的氧还原反应潜力，但合成复杂，可扩展性差。在这里，我们报道了一种绿色可扩展的熔融盐模板策略，使用NaCl通过简单的煅烧和水洗来构建二维超薄介孔碳负载Pt催化剂（Pt SA-NC /2D-OMCN）。催化剂集成了双介孔：小介孔（~3.8 nm）增加活性位点密度，大介孔（20 ~ 30 nm）增加质量输运。结合氮掺杂剂和锚定Pt物种的边缘缺陷，这种结构确保了Pt单原子和簇的均匀分散和结构稳定性。得益于这种精心设计的双介孔催化网络，Pt SA-NC /2D-OMCN在三电极系统和实际燃料电池测试中都表现出出色的ORR活性和长期耐久性。本研究为构建高性能、低铂ORR催化剂提供了一种可扩展的设计策略，拓宽了原子簇共存体系在燃料电池电催化中的应用范围。

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来源期刊

Chemical Communications 化学-化学综合

CiteScore

8.60

自引率

4.10%

发文量

2705

审稿时长

1.4 months

期刊介绍： ChemComm (Chemical Communications) is renowned as the fastest publisher of articles providing information on new avenues of research, drawn from all the world''s major areas of chemical research.