Villemur Juan, Romero Carlos, Crego Jose Manuel, Gordo Elena
Department of Material Science and Engineering, Universidad Carlos III de Madrid, IAAB, 28911 Leganés, Madrid, Spain.
Department of Applied Mathematics, Materials Science and Engineering and Electronic Technology, Universidad Rey Juan Carlos, 28933 Mostoles, Madrid, Spain.
Materials (Basel). 2024 Dec 21;17(24):6253. doi: 10.3390/ma17246253.
The production of green hydrogen through proton exchange membrane water electrolysis (PEMWE) is a promising technology for industry decarbonization, outperforming alkaline water electrolysis (AWE). However, PEMWE requires significant investment, which can be mitigated through material and design advancements. Components like bipolar porous plates (BPPs) and porous transport films (PTFs) contribute substantially to costs and performance. BPPs necessitate properties like corrosion resistance, electrical conductivity, and mechanical integrity. Titanium, commonly used for BPPs, forms a passivating oxide layer, reducing efficiency. Effective coatings are crucial to address this issue, requiring conductivity and improved corrosion resistance. In this study, porous Ti64 structures were fabricated via powder technology, treating them with thermochemical nitriding. The resulting structures with controlled porosity exhibited enhanced corrosion resistance and electrical conductivity. Analysis through scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), grazing incidence XRD and X-ray photoelectron spectroscopy (XPS) confirmed the effectiveness of the coating, meeting performance requirements for BPPs.
通过质子交换膜水电解（PEMWE）生产绿色氢气是一种很有前景的工业脱碳技术，性能优于碱性水电解（AWE）。然而，PEMWE需要大量投资，可通过材料和设计进步来缓解这一问题。双极多孔板（BPP）和多孔传输膜（PTF）等组件对成本和性能有重大影响。BPP需要具备耐腐蚀性、导电性和机械完整性等特性。常用于BPP的钛会形成钝化氧化层，降低效率。有效的涂层对于解决这一问题至关重要，需要具备导电性并提高耐腐蚀性。在本研究中，通过粉末技术制备了多孔Ti64结构，并对其进行热化学氮化处理。所得具有可控孔隙率的结构表现出增强的耐腐蚀性和导电性。通过场发射扫描电子显微镜（FE-SEM）、X射线衍射（XRD）、掠入射XRD和X射线光电子能谱（XPS）分析证实了涂层的有效性，满足了BPP的性能要求。
