Preferred Site Occupation of Doping Cation and Its Impact on the Local Structure of V₂O₅

Cation doping is an effective method to alter the local structure and electronic state of V2O5. While it remains a great challenge experimentally understand whether cations prefer replace V ions or reside between V2O5 layers, namely, substitutional interstitial positions. In this work, cation-doped with different elements M (M = Mn, Ni, Fe) were synthesized via hydrothermal since can uniformly distribute in solution obtain homogeneous target material. The impact on revealed. Multitechniques demonstrate existence small portion V4+ doped samples resulting from change V. Although results do not directly certify where lie structure, all information together provide hint that may positions rather than