近日，中国地质大学黄洪伟团队研究了Fe-N4锚定碳层修补TiO₂空腔构建“晶格异质结”增强光催化氮还原反应。相关论文于2025年7月9日发表在《德国应用化学》杂志上。

高效的电荷分离和载流子转移是决定氮还原反应光催化剂性能的关键因素，氮还原反应在农业和化学工业中具有重要意义。研究组通过在缺陷TiO₂ （D-TiO₂）表面引入Fe-N4锚定碳层（Fe-N-C），并将其植入D-TiO₂的空腔中，构建了一种新型异质结构，称为“点阵异质结”。晶格内异质结，定义为FNCTO，实现了沿Ti-C-N-Fe晶格内原子通道的高效径向载流子转移，极大地促进了N₂吸附，有利于光催化NRR。

结果表明，FNCTO具有良好的光催化N₂还原NH₃活性（88 μmol g^-1 h^-1），明显高于非空腔P25的Fe-N-C位点，说明了空腔斑块诱导晶格内异质结的重要作用。该研究为基于非碳材料的高性能Fe-N-C原子光催化剂的开发铺平了道路。

附：英文原文

Title: Fe‐N4‐anchored Carbon Layer Patched TiO2 Cavities to Construct an "In‐lattice Heterojunction" for Enhanced Photocatalytic Nitrogen Reduction Reactions - Chen - Angewandte Chemie International Edition - Wiley Online Library

Author: Tian-You Chen, Yi-Ran Ying, Jing Wu, Xuan-He Liu, Hongwei Huang

Issue&Volume: 2025-07-09

Abstract: Efficient charge separation and carrier transfer are critical determinants of the performance of photocatalysts for nitrogen reduction reactions (NRR) which are critical for agricultural and chemical industries. In this study, a novel type of heterostructure, termed an "in-lattice heterojunction”, has been constructed by introducing a Fe-N4-anchored carbon layer (Fe-N-C) onto the surface of defective TiO2 (D-TiO2), as well as implanting it into the cavities of D-TiO2. The in-lattice heterojunction, defined as FNCTO, achieves efficient radial carrier transfer along the Ti-C-N-Fe in-lattice atomic channel and greatly promoted N2 adsorption benefiting photocatalytic NRR. Thus, FNCTO exhibits an excellent photocatalytic N2 reduction into NH3 activity (88 μmol g-1 h-1), obviously higher than that of Fe-N-C sites on non-cavity P25, illustrating the crucial role of cavity patch induced in-lattice heterojunction. This study paves a way for the development of high-performance Fe-N-C atomic photocatalysts based on non-carbon materials.

DOI: 10.1002/anie.202509705

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202509705