研究揭示钴纳米粒子，一种高效的氢泵，用于增强铂单原子的氢溢出，这一成果由中国科学院苏州纳米技术与纳米仿生研究所研究人员经过不懈努力而取得。该研究于2025年2月25日发表于国际一流学术期刊《德国应用化学》杂志上。

在此，课题组研究人员报告了一种简单的热解约束策略，以创建杂络合物NMP-SACs，包括Co NMP （Con）和Pt SACs (Pt1)，限制在n掺杂的中空多面体碳中（Con-Pt1@NPC）。该催化剂在碱性电解槽中表现出优异的HER活性和稳定性。计算表明，Co纳米粒子作为h泵，解离水向Pt1位点提供氢，从而通过短的C位点→C-Pt桥位点→Pt位点氢溢出途径增强HER。

据了解，引入OH-相互作用位点加速水解离可以增加活性位点表面的氢覆盖，加速H-溢出，从而增强析氢反应（HER）。近年来对单原子催化剂（SACs）与纳米金属颗粒（NMPs）结合的研究已经开发出了多种同源的纳米金属颗粒催化剂（NMP-SACs），但合成异构的纳米金属颗粒催化剂（NMP-SACs）仍然是一个重大挑战。特别是对于碱性条件下的HER催化剂，理想的杂络合物结构需要具有强亲氧性的非贵金属nmp和具有合适氢结合能的贵金属SAs之间的协同作用。

附：英文原文

Title: Co Nanoparticle: An Efficient H-pump for Pt Single Atoms Towards Enhanced Hydrogen Spillover

Author: Yike Xu, Junyi Du, Jingyun Jiang, Yumin Miao, Zechao Zhuang, Zhenyu Liu, Yuanyuan Yan, Rongrong Pan, Jin Yang, Meiling Wang, Shaonan Gu, Lixing Kang, Dingsheng Wang

Issue&Volume: 2025-02-25

Abstract: Introducing OH-interaction sites to accelerate water dissociation can increase hydrogen coverage on active site surfaces and thus accelerate H-spillover, leading to an enhanced hydrogen evolution reaction (HER). Recent studies on single-atom catalysts (SACs) combined with nano-metal-particles (NMPs) have developed various homologous NMP-SACs, however, synthesizing the heterologous NMP-SACs remains a significant challenge. Particularly for HER catalysts under alkaline conditions, the ideal heterologous structure requires a synergy between non-noble NMPs with strong oxophilicity and noble-metal SAs with suitable hydrogen binding energy. Herein, we report a facile pyrolysis-confinement strategy to create the heterologous NMP-SACs, comprising Co NMP (Con) and Pt SACs (Pt1) confined within N-doped hollow polyhedral carbons (Con-Pt1@NPC). This catalyst demonstrates outstanding HER activity and superior stability in alkaline electrolyzer. Calculations reveal that Co nanoparticles serve as an H-pump, dissociating water to supply hydrogen to Pt1 sites, thereby enhancing the HER through a short C site→C-Pt bridge site→ Pt site hydrogen spillover pathway.

DOI: 10.1002/anie.202502227

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202502227