Kim Jong Gyeong, Han Sunghoon, Pak Chanho
Graduate School of Energy Convergence, Institute of Integrated Technology, Gwangju Institute of Science and Technology, Gwangju 61005, Korea.
Nanomaterials (Basel). 2021 Jun 8;11(6):1519. doi: 10.3390/nano11061519.
The price and scarcity of platinum has driven up the demand for non-precious metal catalysts such as Fe-N-C. In this study, the effects of phosphoric acid (PA) activation and phosphorus doping were investigated using Fe-N-C catalysts prepared using SBA-15 as a sacrificial template. The physical and structural changes caused by the addition of PA were analyzed by nitrogen adsorption/desorption and X-ray diffraction. Analysis of the electronic states of Fe, N, and P were conducted by X-ray photoelectron spectroscopy. The amount and size of micropores varied depending on the PA content, with changes in pore structure observed using 0.066 g of PA. The electronic states of Fe and N did not change significantly after treatment with PA, and P was mainly found in states bonded to oxygen or carbon. When 0.135 g of PA was introduced per 1 g of silica, a catalytic activity which was increased slightly by 10 mV at -3 mA/cm was observed. A change in Fe-N-C stability was also observed through the introduction of PA.
铂的价格和稀缺性推动了对诸如Fe-N-C等非贵金属催化剂的需求。在本研究中，使用以SBA-15作为牺牲模板制备的Fe-N-C催化剂，研究了磷酸（PA）活化和磷掺杂的效果。通过氮气吸附/脱附和X射线衍射分析了添加PA引起的物理和结构变化。通过X射线光电子能谱对Fe、N和P的电子态进行了分析。微孔的数量和尺寸随PA含量而变化，使用0.066 g PA时观察到孔结构的变化。用PA处理后，Fe和N的电子态没有明显变化，P主要以与氧或碳结合的状态存在。当每1 g二氧化硅引入0.135 g PA时，在-3 mA/cm下观察到催化活性略有增加，增加了10 mV。通过引入PA还观察到Fe-N-C稳定性的变化。
