Scholarlink

<p>Molecular single-source precursors are a promising way of obtaining multi-element extended solids directly. We show that thermal decomposition of well-defined mono-, bi- and trimetallic polyoxovanadates (POVs) proceeds through a series of intermediate amorphous and crystalline species which we characterise using solid-state NMR spectroscopy, pair-distribution function (PDF) analysis and in-situ X-ray diffraction, before forming crystalline V<sub>2</sub>O<sub>5</sub> and BiVO<sub>4</sub> products. This synthetic strategy enables the formation of phases inaccessible using other routes, including a previously unknown polymorph of BiVO<sub>4</sub> which we name β-BiVO<sub>4</sub> due to its similarity to β-SnWO<sub>4</sub>. Local structure information also reveals the temperature dependent incorporation of Zn do pants into BiVO<sub>4</sub>. The study also explores the electrochemical properties of amorphous mixed-valence vanadium oxides as Li-ion battery electrodes. We suggest that careful analysis of the thermal decomposition of molecular species may be a way of obtaining hitherto unknown kinetically stabilised polymorphs and amorphous variants of extended solids.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Amorphous intermediates and discovery of a kinetic polymorph of BiVO4 from heating V+Bi+Zn single-source precursors

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月30日

查看全文
  • Alexandria E. Hands,
  • Thomas J. Barnes,
  • Andrea Scarperi,
  • Benjamin M. Gallant,
  • Emanuele Vismara,
  • Julia Wiktor,
  • Stephen E. Brown,
  • David Walker,
  • Ashok S. Menon,
  • Javier Castells-Gil,
  • Dominik J. Kubicki,
  • Sebastian D. Pike

摘要

Molecular single-source precursors are a promising way of obtaining multi-element extended solids directly. We show that thermal decomposition of well-defined mono-, bi- and trimetallic polyoxovanadates (POVs) proceeds through a series of intermediate amorphous and crystalline species which we characterise using solid-state NMR spectroscopy, pair-distribution function (PDF) analysis and in-situ X-ray diffraction, before forming crystalline V2O5 and BiVO4 products. This synthetic strategy enables the formation of phases inaccessible using other routes, including a previously unknown polymorph of BiVO4 which we name β-BiVO4 due to its similarity to β-SnWO4. Local structure information also reveals the temperature dependent incorporation of Zn do pants into BiVO4. The study also explores the electrochemical properties of amorphous mixed-valence vanadium oxides as Li-ion battery electrodes. We suggest that careful analysis of the thermal decomposition of molecular species may be a way of obtaining hitherto unknown kinetically stabilised polymorphs and amorphous variants of extended solids.