中国科学院福建物质结构研究所卢灿忠团队近日实现了磷化镍修饰TiO₂纳米管阵列用于高效PEC水裂解制氢。该研究于2025年5月19日发表在《结构化学》杂志上。

光电化学（PEC）制氢在能源生产中的应用前景广阔。开发了一种以简单、稳定和高效为特征的新策略，以显著提高TiO₂（锐钛矿）纳米管阵列（TNTAs）的PEC性能。该策略需要一系列处理，包括传统的阳极氧化（蚀刻）工艺、一次退火处理和通过浸渍进行的二次退火处理。 

因此，磷化镍（Ni₂P）被复合到有序的二氧化钛（锐钛矿）纳米管阵列光阳极（Ni₂P/TNTAs）上，其PEC制氢性能得到了极大的提高。对Ni₂P/TNTAs复合材料的形貌、半导体带隙结构和PEC制氢性能进行了全面系统的研究。

实验结果表明，在相同的实验条件下，Ni₂P/TNTAs光阳极的测量光电流密度比TNTAs增加了6.63倍。Ni₂P/TNTAs的产氢速率达到182.96 μmol/cm²，是纯TNTAs的6.10倍。Ni₂P/TiO₂界面上优异的界面电荷转移途径促进了TiO₂到Ni₂P的光生载流子分离和电子转移。该方法为设计高效PEC制氢催化剂提供了有价值的参考。

附：英文原文

Title: Nickel phosphide modified TiO2 nanotube arrays for efficient PEC water splitting H2 generation

Author: anonymous

Issue&Volume: 2025-05-19

Abstract: Photoelectrochemical (PEC) hydrogen production holds great promise for applications in energy production. A novel strategy characterized by simplicity, stability, and high efficiency was developed to significantly boost the PEC performance of TiO2 (anatase) nanotube arrays (TNTAs). This strategy entailed a series of treatments, including a conventional anodic oxidation (etching) process, a primary annealing treatment, and a secondary annealing treatment via impregnation. As a result, Nickel phosphide (Ni2P) was composited onto well-ordered titanium dioxide (anatase) nanotube array photoanodes (Ni2P/TNTAs), which exhibit hugely improved PEC hydrogen generation performance. A thorough and systematic investigation was conducted to comprehensively analyze the morphology, semiconductor band-gap structure, and PEC hydrogen production performance of the Ni2P/TNTAs composites. The experimental results demonstrated that under identical experimental circumstances, the measured photocurrent density of the Ni2P/TNTAs photoanode exhibited a 6.63-fold increase relative to that of the TNTAs. The hydrogen production rate of Ni2P/TNTAs reaches 182.96 μmol/cm2, 6.10 times higher than that of the pure TNTAs. The excellent interfacial charge transfer pathway at the Ni2P/TiO2 interface promoted photogenerated carrier separation and electron transfer from TiO2 to Ni2P. This method offers a valuable reference for designing highly efficient PEC hydrogen-production catalysts.

DOI: 10.1016/j.cjsc.2025.100623

Source: http://cjsc.ac.cn/cms/issues/805