氢
氨
电化学
催化作用
无机化学
阳极
制氢
材料科学
氨生产
热分解
电化学电池
化学工程
碳纤维
化学
电极
有机化学
复合数
物理化学
复合材料
工程类
作者
Dae‐Kwang Lim,Austin Plymill,Haemin Paik,Xueren Qian,Strahinja Zecevic,Calum R. I. Chisholm,Sossina M. Haile
出处
期刊:Joule
[Elsevier]
日期:2020-11-01
卷期号:4 (11): 2338-2347
被引量:28
标识
DOI:10.1016/j.joule.2020.10.006
摘要
Production of high-purity hydrogen by thermal-electrochemical decomposition of ammonia at an intermediate temperature of 250°C is demonstrated. The process is enabled by use of a solid-acid-based electrochemical cell (SAEC) in combination with a bilayered anode, comprising a thermal-cracking catalyst layer and a hydrogen electrooxidation catalyst layer. Cs-promoted Ru on carbon nanotubes (Ru/CNT) serves as the thermal decomposition catalyst, and Pt on carbon black mixed with CsH2PO4 is used to catalyze hydrogen electrooxidation. Cells were operated at 250°C with humidified dilute ammonia supplied to the anode and humidified hydrogen supplied to the counter electrode. A current density of 435 mA/cm2 was achieved at a potential of 0.4 V and ammonia flow rate of 30 sccm. With a demonstrated faradic efficiency for hydrogen production of 100%, the process yields hydrogen at a rate of 1.48 molH2/gcath.
科研通智能强力驱动
Strongly Powered by AbleSci AI