构建Ni2P-CeO2异质结构内建电场用于高效析氢反应。

IF 3.9 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2025-10-02 DOI:10.1021/acs.langmuir.5c03855

Zhiqiang Sun,Bei Li,Hao Wu,Shiyang Fei,Yan Shang,Chunmei Zhang,Xiaofan Ye,Zhenyu Liang,Qian Zhang,Shuijian He

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引用次数: 0

摘要

本研究以商用棉布（CC）和醋酸纤维素（CA）为原料，利用醋酸纤维素和棉布的协同螯合作用来配位镍和铈离子，采用绿色方法制备了材料前驱体（CC/CA/Ni2+-Ce3+）。通过高温热解得到前驱体CF-C/Ni-CeO2，再经过磷化反应形成CF-C/Ni2P-CeO2异质结构。在该结构中，CeO2作为“电子受体”，使电子从Ni2P转移到CeO2，并通过氧空位介导的电子-离子协同传输机制促进电荷的快速再分配。该工艺优化了析氢反应（HER）中氢中间体的吸附自由能（ΔGH*）。双活性位点的协同作用使CF-C/Ni2P-CeO2-2电极在碱性条件下具有出色的HER催化性能，在过电位仅为102 mV时电流密度为10 mA cm-2，在过电位为234 mV时电流密度为100 mA cm-2，同时在约100 mA cm-2的高电流下保持50小时以上的稳定性。

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Constructing a Built-in Electric Field of Ni2P-CeO2 Heterostructure for Efficient Hydrogen Evolution Reaction.

In this study, we utilized a green method to prepare the material precursor (CC/CA/Ni2+-Ce3+) by using commercial cotton cloth (CC) and cellulose acetate (CA) as sources, leveraging the synergistic chelation effect of cellulose acetate and cotton cloth to coordinate nickel and cerium ions. Subsequently, precursor CF-C/Ni-CeO2 was obtained through high-temperature pyrolysis, followed by phosphidation to form the CF-C/Ni2P-CeO2 heterostructure. Within this structure, CeO2 acts as an "electron acceptor", enabling electron transfer from Ni2P to CeO2 and promoting rapid charge redistribution through an oxygen vacancy-mediated electron-ion cooperative transport mechanism. This process optimizes the adsorption free energy of hydrogen intermediates (ΔGH*) during the hydrogen evolution reaction (HER). This synergistic effect of dual active sites enables the CF-C/Ni2P-CeO2-2 electrode with outstanding HER catalytic performance under alkaline conditions, achieving a current density of 10 mA cm-2 at an overpotential of only 102 mV and 100 mA cm-2 at 234 mV, while maintaining stability for more than 50 h at a high current of approximately 100 mA cm-2.

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).