Scholarlink

<p>Achieving efficient and highly selective conversion of CH<sub>4</sub> into high-value-added chemicals through photodriving under mild conditions remains a significant challenge, primarily due to the limited utilization efficiency of photogenerated carriers. Herein, we report an <i>in-situ</i> growth strategy for constructing a robust InVO<sub>4</sub>-based heterojunction by intermarrying InVO<sub>4</sub> and BiVO<sub>4</sub> through cation-exchange. This method enables the resultant InVO<sub>4</sub>/BiVO<sub>4</sub> heterojunction to possess strong interfacial electronic coupling, which accelerates the interface charge transfer and significantly enhances the separation efficiency of photogenerated carriers. Under visible light-driven reaction conditions at ambient temperature and pressure, the InVO<sub>4</sub>/BiVO<sub>4</sub> heterojunction demonstrates high selectivity (&gt;90%) in photocatalyzing the oxidation of CH<sub>4</sub> to high-value oxygenated hydrocarbons (CH<sub>3</sub>OH and HCHO), with a yield of 318.9 µmol g<sup>−1</sup> h<sup>−1</sup>, which is 4.8 times higher than that of pristine BiVO<sub>4</sub>. Comprehensive control and isotope tracing experiments, as well as <i>in-situ</i> detection of transient species reveal that the key intermediate product CH<sub>3</sub>OOH is primarily formed through the binding of ·CH<sub>3</sub> radicals with protons and O<sub>2</sub>, explaining why the oxygen source of the CH<sub>3</sub>OH product is mainly derived from O<sub>2</sub>.</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

Intermarriage of InVO4 and BiVO4 via cation-exchange to boost charge separation for efficient photocatalytic CH4 oxidation to oxygenates

  • 期刊论文

  • 发表日期：

    2025年2月24日

查看全文
  • Guang-Xing Dong,
  • Meng-Ran Zhang,
  • Cheng-Cheng Jiao,
  • Zhao-Lei Liu,
  • Ke Su,
  • Min Zhang,
  • Tong-Bu Lu

摘要

Achieving efficient and highly selective conversion of CH4 into high-value-added chemicals through photodriving under mild conditions remains a significant challenge, primarily due to the limited utilization efficiency of photogenerated carriers. Herein, we report an in-situ growth strategy for constructing a robust InVO4-based heterojunction by intermarrying InVO4 and BiVO4 through cation-exchange. This method enables the resultant InVO4/BiVO4 heterojunction to possess strong interfacial electronic coupling, which accelerates the interface charge transfer and significantly enhances the separation efficiency of photogenerated carriers. Under visible light-driven reaction conditions at ambient temperature and pressure, the InVO4/BiVO4 heterojunction demonstrates high selectivity (>90%) in photocatalyzing the oxidation of CH4 to high-value oxygenated hydrocarbons (CH3OH and HCHO), with a yield of 318.9 µmol g−1 h−1, which is 4.8 times higher than that of pristine BiVO4. Comprehensive control and isotope tracing experiments, as well as in-situ detection of transient species reveal that the key intermediate product CH3OOH is primarily formed through the binding of ·CH3 radicals with protons and O2, explaining why the oxygen source of the CH3OH product is mainly derived from O2.