Today, hydrogen mainly originates from fossil sources (gas, oil, and coal). Room temperature water electrolysis is an interesting alternative for renewable electricity storage, even if it is well-known that high-temperature systems are more efficient. To address this issue, we studied different non-platinum group metal (non-PGM) catalysts for alkaline oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) by recording cyclic voltamperograms with a rotating disk electrode set up. Physicochemical characterizations of Ni-based and FeNi₃-based catalysts were performed using transmission electron microscopy, X-ray diffraction (XRD), and inductively coupled plasma mass spectroscopy (ICP-MS). Ni synthesized by the hot injection method is a good catalyst for HER, yet still less active than Pt/C. FeNi₃ with and without a Ni surface doping is very good OER catalysts, slightly better than commercial unsupported IrO₂. Electrochemical tests under alternating magnetic field (AMF) using these nanoparticles are ongoing, as these materials are compatible with AMF activation.

Graphical Abstract

今天，氢主要来自化石资源（天然气，石油和煤炭）。室温水电解是可再生电力存储的一种有趣的替代方法，即使众所周知高温系统效率更高。为了解决这个问题，我们通过设置旋转圆盘电极记录循环伏安图，研究了用于碱性氧释放反应（OER）和氢释放反应（HER）的不同非铂族金属（non-PGM）催化剂。使用透射电子显微镜，X射线衍射（XRD）和电感耦合等离子体质谱（ICP-MS）对Ni基催化剂和FeNi ₃基催化剂进行了物理化学表征。通过热注射法合成的Ni是HER的良好催化剂，但活性仍低于Pt / C。镍铁₃具有和不具有镍表面掺杂非常好OER催化剂，略好于商业不受支持的IrO ₂。由于这些材料与AMF活化兼容，因此正在使用这些纳米粒子在交流磁场（AMF）下进行电化学测试。

图形概要