复合物Pt@PCN-250-Fe在电催化析氢方面的应用

Application of Complex PCN-250-Fe@Pt in Electrocatalytic Hydrogen Evolution

氢能由于具有环境友好、可再生、零二氧化碳排放等特点,被认为是未来最具有潜力的能源载体和传统化石能源的最佳替代品.电解水包括两个半反应:析氢反应(HER)和析氧反应(OER).近几年来,贵金属由于其优异的催化性能,特别是与新旧能源转换与利用相关的电催化性能,已经引起了人们的广泛关注.贵金属铂(Pt)是HER最优异的催化剂,但其高昂的价格、极低的地球储量极大的限制了其大规模的工业化应用.为了减少Pt用量,本实验采用具有大的比表面积、丰富的孔洞且易于制备的金属有机框架材料(简称MOFs)PCN-250-Fe与适量氯铂酸(H2PtCl6·6H2O)进行复合再经过高温还原煅烧,最终得到具有良好HER性能的复合产物Pt@PCN-250-Fe,同时,我们对此复合产物进行了一系列的材料表征及电化学HER性能研究.

Hydrogen energy is considered to be the most promising energy carrier to replace traditional fossil energy because of its clean and efficient in the future.The state-of-the-art catalyst for hydrogen evolution in electrolyzed water mainly rely on the use of noble-metal-based electrocatalysts.The high price and extremely low earth reserves limit its industrial applications.Metal organic framework material(MOFs),as a class of crystalline coordination polymers with large specific surface area and abundant pores,have been widely used as precursors for controllable fabrication functional materials.In order to reduce the amount of noble-metal(such as Pt),we rationally chose PCN-250-Fe as precursor to react with chloroplatinic acid(H2 PtCl66 H2 O).After low temperature reduction,the composite Pt@PCN-250-Fe with good HER performance was obtained.At the same time,we carried out a series of characterizations and electrochemical HER performance studies on the composite Pt@PCN-250-Fe.