铂修饰金纳米孔的电催化析氢性能及机理  

Electrocatalytic hydrogen evolution performance and mechanism of platinum modified gold nanoholes

作　　者：庞柳青 田兴宇 刘雪龙 李文一[1] PANG Liuqing;TIAN Xingyu;LIU Xuelong;LI Wenyi(The First Monitoring and Application Center(CEA),Tianjin 300180,China;Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Nankai University,Tianjin 300071,China)

机构地区：[1]中国地震局第一监测中心,天津300180 [2]南开大学先进能源材料化学教育部重点实验室,天津300071

出　　处：《材料工程》2024年第10期153-159,共7页Journal of Materials Engineering

基　　金：中国地震局地震科技星火计划基金项目(XH22016YA)。

摘　　要：到目前为止,研发与铂材料效率相当甚至更好的电催化析氢体系仍然是一项艰巨的任务。本研究证明了铂沉积在涂覆有钛黏附层的柔性衬底的纳米孔金电极(Pt/Au-NHs/Ti/K)在光照下具有优异的电化学水分解析氢能力。在光照下Pt/Au-NHs/Ti/K产生的局域表面等离子体效应使得材料电催化析氢活性增高,测试结果表明其电催化析氢性能与商业Pt电极的析氢活性相当。机理研究表明,等离子体激发的Au-NHs结构是热电子的有效来源,底层Ti基黏附层可有效促进热电子与空穴分离。在整个系统中,热效应可以忽略不计,激光照射时电流密度的突然变化证明了电荷载流子的快速产生和注入。结果表明,Pt/Au-NHs/Ti/K电极在恒定电流密度为10 mA·cm^(-2)时测试28h仍具有良好稳定性。So far,it is still a difficult task to develop electrocatalytic hydrogen evolution systems with comparable or even better efficiency than that of Pt systems.This study proves that the nanoporous gold electrode deposited on a flexible substrate coated with a titanium adhesion layer(Pt/Au-NHs/Ti/K)has excellent electrochemical water decomposition under laser irradiation.Localized surface plasmon resonance under light irradiation increases the electrocatalytic hydrogen evolution activity of the material,which shows that its performance is comparable to that of the commercial Pt electrode.Mechanism studies show that the plasma-excited Au nanoholes structure is an effective source of hot electrons,and the underlying Ti-based adhesive layer can effectively promote the separation of hot electrons and holes.In this system,the thermal effect is negligible,and the sudden change of the current density upon laser irradiation is demonstrated by the rapid generation and injection of charge carriers.The result shows that the Pt/Au-NHs/Ti/K electrode still has good stability under 10 mA·cm^(-2) constant current density for 28 h.

关 键 词：等离子体效应 热电子 黏附层 电催化 析氢反应 金纳米孔 铂电极 

分 类 号：TB34[一般工业技术—材料科学与工程]