纳米片
纳米孔
电解质
化学工程
质子交换膜燃料电池
电化学
材料科学
电极
催化作用
纳米技术
化学
燃料电池
有机化学
工程类
物理化学
作者
Zhiqiang Xie,Lei Ding,Shule Yu,Weitian Wang,Christopher Capuano,Alex Keane,Katherine E. Ayers,David A. Cullen,Harry M. Meyer,Fengyuan Zhang
标识
DOI:10.1016/j.apcatb.2023.123298
摘要
Increasing the catalyst utilization efficiency and simplifying electrode fabrication processes are crucial to accelerate development of low-cost proton exchange membrane electrolyzer cells (PEMECs). Here, we develop a facile route to fabricate ionomer-free iridium nanosheet integrated electrodes, in which nanoporous iridium nanosheets (IrNS) with abundant exposed edges and nanopores are deposited on thin titanium liquid/gas diffusion layers (TT-LGDLs) via a low-temperature chemical synthesis strategy. Benefiting from high catalytic activity, good electrode conductivity and excellent liquid/gas transport properties, such nanoporous IrNS electrodes with low catalyst loadings require low cell voltages of 1.65 V and 1.78 V at 3000 and 6000 mA/cm2, respectively. More impressively, a stable performance can be well maintained under extremely high current density tests of 5000 mA/cm2, demonstrating the potential of low-loading nanoporous IrNS electrodes in solid-electrolyte based electrochemical conversion cells that require high current density operation.
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