用于光电化学水分解的 SrNbO 和 SrNbO 氮化过程研究到 SrNbON。

Investigation on nitridation processes of SrNbO and SrNbO to SrNbON for photoelectrochemical water splitting.

机构信息

Department of Chemical System Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.

Global Aqua Innovation Center for Improving Living Standards and Water-sustainability, Shinshu University, 4-17-1 Wakasato, Nagano, 380-8553, Japan.

出版信息

Sci Rep. 2018 Oct 26;8(1):15849. doi: 10.1038/s41598-018-34184-2.

DOI:10.1038/s41598-018-34184-2

PMID:30367107

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6203854/

Abstract

The processes involved in the nitridation of SrNbO and SrNbO to SrNbON were assessed by varying the nitridation time, and the related effects on the physical and photoelectrochemical properties of the nitrided products were investigated. In the case of the layered perovskite-type oxide SrNbO, the introduction of nitrogen and the extraction of oxygen took place concurrently, leading to lattice shrinkage and a porous structure. In contrast, during nitridation of the perovskite-type oxide SrNbO, nitrogen was initially introduced without any loss of oxygen, which caused phase separation as a result of a lattice expansion and a charge compensation. The photoelectrochemical properties of obtained SrNbON under simulated sunlight were found to vary with the oxide precursor used and with the nitridation process.

摘要

通过改变氮化时间来评估 SrNbO 和 SrNbO 氮化生成 SrNbON 的过程，并研究了氮化产物物理和光电化学性能的相关影响。对于层状钙钛矿型氧化物 SrNbO，氮的引入和氧的提取同时发生，导致晶格收缩和多孔结构。相比之下，在钙钛矿型氧化物 SrNbO 的氮化过程中，氮最初是在不损失氧的情况下引入的，这导致了由于晶格膨胀和电荷补偿而产生的相分离。在模拟太阳光下，所获得的 SrNbON 的光电化学性能发现会随所使用的氧化物前体和氮化过程而变化。