XAS/XES analysis of Co-based catalysts for electrochemical application

Several group of cobalt-based catalysts will be analyzed using X-ray absorption and emission spectroscopy. (i) The first group of materials comprises of single-atom catalysts, Co/N/C, before and after accelerated stress test protocols in order to complete the datasets acquired previously. (ii) The feasibility study will be performed on the second group, Co-based polyoxometalates (POMs), where the latter are in a liquid form with different POM concentration. (iii) The third group of the catalysts are core-shell CoFe particles supported on gold substrate will be studied in situ under heating in the presence of dry air.多组钴基催化剂将通过X射线吸收与发射光谱（X-ray absorption and emission spectroscopy）进行分析。(i) 第一组材料包含单原子催化剂Co/N/C，将对其加速应力测试（accelerated stress test）前后的状态开展分析，以完善此前获取的数据集。(ii) 第二组为钴基多金属氧酸盐（Co-based polyoxometalates，POMs），将对其进行可行性研究；该组催化剂呈液态，且具有不同的POM浓度。(iii) 第三组催化剂为负载于金基底上的核壳结构CoFe颗粒，将在干燥空气氛围下加热并开展原位（in situ）研究。