PtIr/CF双功能电极在氨水制氢中的电催化性能研究
Study on electrocatalytic performance of PtIr/CF bifunctional electrode in hydrogen production from ammonia
王中华 1郑淞生 1周安游 1崔伟 1吴梦洁 1姚育栋 1王兆林1
作者信息
- 1. 厦门大学能源学院,福建 厦门 361102
- 折叠
摘要
以碳纤维纸(Carbon Fiber,CF)为基底,通过可控电沉积制备了PtIr/CF双功能催化电极,并对其在氨水制氢中的电催化性能进行研究.结果表明,Pt、Ir均匀沉积在基底纤维骨架上,呈花簇状分布,表面形成的针形纳米枝晶为催化反应提供丰富的活性位点.当其用作氨氧化反应(Ammonia Oxidation Reaction,AOR)的阳极时,在1.5 mol/L KOH+1.5 mol/L NH3 的混合电解液中,PtIr/CF催化电极显示出 0.39 V(vs.RHE)的AOR起始电位和 134.4 mA/cm2 的电流密度;而当其作为阴极用于析氢反应(Hydrogen Evolution Reaction,HER)时,PtIr/CF催化电极在 0.121 V(vs.RHE)的电压下实现了 100 mA/cm2 的析氢性能,并显示出优于Pt/CF电极的电催化性能和稳定性.
Abstract
PtIr/CF bifunctional catalytic electrodes are prepared through the controlled electrodeposition method by using carbon fiber paper(CF)as the substrate,and their electrocatalytic performance for ammonia to hydrogen is investigated.It is shown that Pt and Ir uniformly deposit on the substrate fiber skeleton with a flower cluster-like distribution,and the needle-shaped nanodendrites formed on the surface provide abundant active sites for the catalytic reaction.When it is used as an anode for Ammonia Oxidation Reaction(AOR),the PtIr/CF catalytic electrode shows an AOR onset potential of 0.39 V(vs.RHE)and a current density of 134.4 mA·cm-2 in a mixed electrolyte of 1.5 mol·L-1 KOH+1.5 mol·L-1 NH3.As it is used as a cathode for Hydrogen Evolution Reaction(HER),the PtIr/CF catalytic electrode achieves a hydrogen evolution performance of 100 mA·cm-2 at 0.121 V(vs.RHE)and shows better electrocatalytic performance and stability than the Pt/CF electrode.
关键词
氨氧化反应/析氢反应/电催化/双功能电极/氨制氢Key words
ammonia oxidation reaction/hydrogen evolution reaction/electrocatalytic/bifunctional electrode/ammonia to hydrogen引用本文复制引用
基金项目
国家自然科学基金面上项目(21875199)
厦门大学能源学院-淄博高新技术产业开发区氢能研发中心项目(XDHT2020023C)
天然气管道掺氢降碳工程化示范项目(20213160A0336)
出版年
2024
NETL
NSTL
万方数据