杭州师范大学Linfang Lu团队实现了方波电位策略快速去除铂基纳米催化剂中的配体。这一研究成果发表在2025年6月5日出版的《德国应用化学》杂志上。

开发从纳米颗粒（NP）表面去除配体的有效方法对于获得表面清洁的纳米催化剂至关重要。研究组开发了一种方波电位（SWP）策略，可以在1分钟（40秒）内有效地从铂（Pt）基纳米催化剂的表面去除配体，其去除效率比传统的循环伏安循环高30倍。对物理特性和催化性能的综合分析证实了SWP策略的有效性。 

原位电化学红外光谱和拉曼光谱表明，在配体去除过程中，氧化电位（1.24 V）可以用Pt-O共价键取代Pt-N配位键，形成Pt-O-NH₂R的中间状态，而还原电位（0.20 V）可以将配体从Pt表面分离。此外，SWP策略是通用的，可以有效地从Pt表面去除各种配体，从Pt基合金纳米催化剂中去除油胺配体。从纳米催化剂中有效去除配体对于确保电催化结果的可重复性以及获得清洁的催化剂以揭示纳米催化中的内在效应至关重要。

附：英文原文

Title: Fast Removing Ligands from Platinum-Based Nanocatalysts by a Square-Wave Potential Strategy

Author: Rui Xu, Lingshan Liao, Wenya Liang, Huaiyi Wang, Qiusheng Zhou, Wenke Liu, Mengting Chen, Baizeng Fang, Di Wu, Haiyan Jin, Yunxia Li, Shihui Zou, Linfang Lu

Issue&Volume: 2025-06-05

Abstract: Developing effective methods to remove ligands from the surface of nanoparticles (NPs) is crucial for obtaining surface-cleaned nanocatalysts. In this manuscript, we develop a square-wave potential (SWP) strategy that efficiently removes ligands from the surface of platinum (Pt)-based nanocatalysts within 1 minute (40 s), achieving a removal efficiency 30 times higher than that of traditional cyclic voltammetry cycling. Comprehensive analyses of physical characterization and catalytic performance confirm the effectiveness of the SWP strategy. In situ electrochemical infrared and Raman spectroscopy show that the oxidation potential (1.24 V) can replace the Pt-N coordination bond with a Pt-O covalent bond to form the intermediate state of Pt-O-NH2R during ligand removal, while the reduction potential (0.20 V) can detach the ligand from the surface of Pt. Moreover, the SWP strategy is versatile, extending the efficient removal of various ligands from the surface of Pt and the oleylamine ligand from Pt-based alloy nanocatalysts. The efficient removal of ligands from nanocatalysts is critical for ensuring the reproducibility of electrocatalytic results and for obtaining clean catalysts to reveal intrinsic effects in nanocatalysis.

DOI: 10.1002/anie.202509746

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202509746