Analyzing transient corrosion effects of water electrolysis cathode and anodes alloy based catalysts using WAXS, SAXS and XRF

As we move towards a sustainable society, electrolysis based hydrogen provides a flexible molecule that can be used for chemicals, fuels, heating, etc. While water electrolysis catalysts have been analyzed extensively from a fundamental aspect, there are still open question with respect to commercial issues such as corrosion and issues relating to stopping and starting. In this work we would analyse various anode (NiFe, NiCo, FeCo) and cathode (NiMo, CoMo, NiW) catalysts at industrial relevant current densities (300-1000 mA/cm2) and monitor their corrosion and dealloying as a function of transient stop-start experiments. By scanning x-rays throughout the anode/diaphragm/cathode device, we can monitor in-operando location specific lattice modifications or dealloying as a function of transient stop start operations. Furthermore using CsOH or RbOH as an electrolyte will allow us to monitor X-ray fluorescence, and thus time resolved double layer charge build-up and dissipation.

随着我们向可持续社会迈进，基于电解的氢提供了一种灵活的分子，可用于化学品、燃料、供暖等领域。虽然水电解催化剂已从基础层面得到广泛分析，但在腐蚀以及启停相关问题等商业议题上仍存在未解决的问题。本研究将在工业相关电流密度（300-1000 mA/cm²）下分析多种阳极（NiFe、NiCo、FeCo）和阴极（NiMo、CoMo、NiW）催化剂，并监测其腐蚀和脱合金行为随瞬态启停实验的变化。通过在阳极/隔膜/阴极装置中进行X射线扫描，我们能够原位（in-operando）监测特定位置的晶格修饰或脱合金行为随瞬态启停操作的变化。此外，使用CsOH或RbOH作为电解质可实现X射线荧光监测，进而获得时间分辨的双电层电荷积累与消散过程。