Han Hyungkyu, Kment Stepan, Karlicky Frantisek, Wang Lei, Naldoni Alberto, Schmuki Patrik, Zboril Radek
Theoretical Division and Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA.
Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University, Slechtitelu 11, 783 71, Olomouc, Czech Republic.
Small. 2018 May;14(19):e1703860. doi: 10.1002/smll.201703860. Epub 2018 Apr 14.
Here, a Sb-doped SnO (ATO) nanorod underneath an α-Fe O nanorod sheathed with TiO for photoelectrochemical (PEC) water splitting is reported. The experimental results, corroborated with theoretical analysis, demonstrate that the ATO nanorod underlayer effect on the α-Fe O nanorod sheathed with TiO enhances the PEC water splitting performance. The growth of the well-defined ATO nanorods is reported as a conductive underlayer to improve α-Fe O PEC water oxidation performance. The α-Fe O nanorods grown on the ATO nanorods exhibit improved performance for PEC water oxidation compared to α-Fe O grown on flat fluorine-doped tin oxide glass. Furthermore, a simple and facile TiCl chemical treatment further introduces TiO passivation layer formation on the α-Fe O to reduce surface recombination. As a result, these unique nanostructures show dramatically improved photocurrent density (139% higher than that of the pure hematite nanorods).
本文报道了一种用于光电化学（PEC）水分解的结构，即在包覆有TiO的α-Fe₂O₃纳米棒下方有一根Sb掺杂的SnO（ATO）纳米棒。实验结果与理论分析相佐证，表明ATO纳米棒底层对包覆有TiO的α-Fe₂O₃纳米棒的影响增强了PEC水分解性能。据报道，生长良好的ATO纳米棒作为导电底层可改善α-Fe₂O₃的PEC水氧化性能。与生长在平坦的氟掺杂氧化锡玻璃上的α-Fe₂O₃相比，生长在ATO纳米棒上的α-Fe₂O₃纳米棒在PEC水氧化方面表现出更好的性能。此外，一种简单易行的TiCl化学处理进一步在α-Fe₂O₃上形成TiO钝化层以减少表面复合。结果，这些独特的纳米结构显示出显著提高的光电流密度（比纯赤铁矿纳米棒高139%）。
