材料科学
化学工程
腐蚀
钝化
电解
接触角
扫描电子显微镜
涂层
电导率
傅里叶变换红外光谱
质子交换膜燃料电池
钛
接触电阻
透射电子显微镜
复合材料
电极
图层(电子)
冶金
纳米技术
化学
电解质
燃料电池
物理化学
工程类
作者
Yue Liu,Shaobo Huang,Shanlong Peng,Heng Zhang,Lifan Wang,Xindong Wang
标识
DOI:10.1007/s12613-022-2452-1
摘要
Proton-exchange membrane water electrolysis (PEM WE) is a particularly promising technology for renewable hydrogen production. However, the excessive passivation of the gas diffusion layer (GDL) will seriously affect the high surface-contact resistance and result in energy losses. Thus, a mechanism for improving the conductivity and interface stability of the GDL is an urgent issue. In this work, we have prepared a hydrophilic and corrosion resistant conductive composite protective coating. The polydopamine (PDA) film on the Ti surface, which was obtained via the solution oxidation method, ensured that neither micropores nor pinholes existed in the final hybrid coatings. In-situ reduced gold nanoparticles (AuNPs) improved the conductivity to achieve the desired interfacial contact resistance and further enhanced the corrosion resistance. The surface composition of the treated samples was investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The results indicated that the optimized reaction conditions included a pH value of 3 of HAuCl4 solution with PDA deposition (48 h) on papers and revealed the lowest contact resistance (0.5 mΩ·cm2) and corrosion resistance (0.001 μA·cm−2) in a 0.5 M H2SO4 + 2 ppm F− solution (1.7 V vs. RHE) among all the modified specimens, where RHE represents reversible hydrogen electrode. These findings indicated that the Au—PDA coating is very appropriate for the modification of Ti GDLs in PEM WE systems.
科研通智能强力驱动
Strongly Powered by AbleSci AI