先进的低维 PdAg 网络纳米链可实现卓越的醇电催化作用,Applied Surface Science

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先进的低维 PdAg 网络纳米链可实现卓越的醇电催化作用
Applied Surface Science ( IF 6.3 ) Pub Date : 2024-01-02 , DOI: 10.1016/j.apsusc.2024.159291
Nannan Zhang , Shudi Yu , Jie Li , Wanyu Liang , Yanghanqi Li , Zhengying Wu , Caiqin Wang , Yukou Du

先进的 1D 材料由于比 0D 纳米粒子 (NP) 具有更强的结构耐用性而成为焦点。不幸的是，具有0D-1D复合结构的独特电催化剂鲜有报道。在此，由一系列纳米粒子组装而成的具有不同元素组成的低维PdAg网络纳米链（NNC）被设计为乙二醇氧化反应（EGOR）和乙醇氧化反应（EOR）的有效0D-1D电催化剂。低维PdAg NNC不仅具有比0D NP更强的结构稳定性，而且比传统的1D纳米链赋予催化剂更丰富的活性位点。由于协同电子效应、丰富的活性位点和表面缺陷，成分优化的PdAg-2 NNCs表现出最佳的电催化活性，大大超过了大多数报道的研究。得益于0D-1D复合结构和稳定的网络化纳米链特征，PdAg-2 NNCs在3600 s的计时安培（CA）实验后仍然保持较高的电流密度，并且与商业Pd/C相比，通过连续3次CA测试没有明显下降，揭示了卓越的稳定性。同时，PdAg-2 NNCs表现出显着的抗CO中毒能力和最低的起始氧化电位，表现出增强的反应动力学。这项工作制备了一种具有低维复合结构的新型电催化剂，为高效电催化剂的合成提供了新的指导方针。

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Advanced low-dimensional PdAg networked nanochains for the superior alcohol electrocatalysis

Advanced 1D materials have become the focus due to the enhanced structure durability than 0D nanoparticles (NPs). Unfortunately, the unique electrocatalysts with 0D-1D composite structure are rarely reported. Herein, the low-dimensional PdAg networked nanochains (NNCs) with diverse element composition assembled from a sequence of NPs were designed as efficient 0D-1D electrocatalysts toward the ethylene glycol oxidation reaction (EGOR) and ethanol oxidation reaction (EOR). The low-dimensional PdAg NNCs not only possess stronger structure stability than 0D NPs, but also endow catalysts with more abundant active sites than traditional 1D nanochains. Attributed to the synergistic electronic effect, abundant active sites and surface defects, the composition-optimized PdAg-2 NNCs behaved the optimal electrocatalytic activities, greatly surpassing most of reported studies. Benefiting from 0D-1D composite structure and stable networked nanochain feature, the PdAg-2 NNCs still remained higher current density after the 3600 s chronoamperometry (CA) experiment and without obvious decline through three consecutive CA tests compared to commercial Pd/C, revealing the remarkable stability. Meanwhile, the PdAg-2 NNCs exhibited the prominent anti-CO poisoning ability and the lowest onset oxidation potential, manifesting the enhanced reaction kinetics. This work fabricated a novel electrocatalyst with low-dimension composite structure, producing new guidelines for the synthesis of high-efficiency electrocatalysts.

更新日期：2024-01-02

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