机电工程技术2026，Vol.55Issue(16)：56-62,7.DOI:10.3969/j.issn.1009-9492.2026.16.008
CeO2复合调控氧空位与电子结构增强Co3O4纳米棒氢传感性能
CeO2 Composite Modulates Oxygen Vacancies and Electronic Structure to Enhance the Hydrogen Sensing Performance of Co3O4 Nanorod
摘要
Abstract
Hydrogen,as a clean energy carrier,plays a crucial strategic role in the low-carbon transition.However,its wide explosive limits and low ignition energy pose significant safety hazards to the secure utilization of hydrogen energy.A CeO2-Co3O4 composite hydrogen-sensitive material with a nanorod structure is successfully synthesized via hydrothermal synthesis and annealing treatment,effectively addressing the key issues of conventional metal oxide semiconductor hydrogen sensors,such as high operating temperature and sluggish response/recovery.The results show that the introduction of CeO2 induces lattice distortion at the octahedral sites of Co3O4.XPS further reveals that after CeO2 incorporation,the surface concentrations of oxygen vacancies and adsorbed oxygen increase,and the Co 2p peaks shift toward higher binding energy,confirming that CeO2 effectively modulates the surface chemical states and the local electronic structure of Co.The hydrogen sensing performance test results indicate that the composite material achieves a response value of 8.18 toward 500×10-6 H2(volurne fraction)at 150℃,which is approximately 2.2 times higher than that of pristine Co3O4.Its response and recovery times are shortened to 102 s and 33 s,respectively,and the detection limit is as low as 1×10-6.In addition,the response value exhibits a good linear relationship with the H2 concentration.The performance enhancement mechanism can be attributed to the synergistic increase in oxygen vacancies and adsorbed oxygen species induced by CeO2 compositing,which promotes surface activation of O2,and to the modulation of the Co electronic structure that accelerates charge transfer.This work provides a new strategy with a simple preparation process and cost-effectiveness for the design of high-performance hydrogen-sensitive materials.关键词
氢气传感器/CeO2-Co3O4复合氢敏材料/氧空位/纳米棒结构Key words
hydrogen sensor/CeO2-Co3O4 composite hydrogen-sensitive material/oxygen vacancies/nanorod structure分类
能源科技引用本文复制引用
李木林,李思蓉,王媛媛,王贵欣,车弟强,李海龙,卢娟..CeO2复合调控氧空位与电子结构增强Co3O4纳米棒氢传感性能[J].机电工程技术,2026,55(16):56-62,7.基金项目
四川省市场监督管理局科技计划项目(SCSJZ2024022) （SCSJZ2024022）
