Scholarlink

<p>Bismuth vanadate (BiVO<sub>4</sub>) is regarded as a promising photoanode for photoelectrochemical (PEC) water splitting. Despite its advantage in band gap and visible-light response, the BiVO<sub>4</sub> exhibits an unsatisfactory achieving water splitting due to severe charge recombination. Herein, we elucidate an innovative approach involving the incorporation of single Ru atom with a CoFe-LDH cocatalyst (Ru<sub>0.51</sub>-CoFe-LDH) and integrating it onto the BiVO<sub>4</sub> semiconductor substrate. The resulting Ru<sub>0.51</sub>-CoFe-LDH/BiVO<sub>4</sub> photoanode film demonstrates commendable charge injection efficiency (76%) and charge collection efficiency&#xa0;(100%). Interestingly, the yield of hydrogen and oxygen increases linearly at a stoichiometric ratio of about 2:1, reaching 158.6 and 67.4&#xa0;μmol after 140&#xa0;min of irradiation, respectively. According to experimental characterization and density functional theory calculation, this remarkable performance results from single Ru atoms triggering the electron rearrangement of Ru<sub>0.51</sub>-CoFe-LDH to engineer active sites and optimize interfacial energetics. Additionally, the negative shift of Ru<sub>0.51</sub>-CoFe-LDH band edge gives rise to more conspicuous band bending of the n–n junction formed with BiVO<sub>4</sub>, expediting the separation and transfer of photogenerated electron–hole pairs at the interface. This work furnishes a new preparation perspective for PEC water splitting systems to construct single atoms in the semiconductor substrate.</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

Single-Atom Ru in CoFe-LDH Drives Efficient Charge Separation on BiVO4 for Solar Water Splitting

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年1月19日

查看全文
  • Wenhui Deng,
  • Gaoshuang He,
  • Haozhi Zhou,
  • Wenhao He,
  • Lei Gan,
  • Chenyu Zhang,
  • Keke Wang,
  • Xiaoqing Qiu,
  • Yang Liu,
  • Wenzhang Li

摘要

Bismuth vanadate (BiVO4) is regarded as a promising photoanode for photoelectrochemical (PEC) water splitting. Despite its advantage in band gap and visible-light response, the BiVO4 exhibits an unsatisfactory achieving water splitting due to severe charge recombination. Herein, we elucidate an innovative approach involving the incorporation of single Ru atom with a CoFe-LDH cocatalyst (Ru0.51-CoFe-LDH) and integrating it onto the BiVO4 semiconductor substrate. The resulting Ru0.51-CoFe-LDH/BiVO4 photoanode film demonstrates commendable charge injection efficiency (76%) and charge collection efficiency (100%). Interestingly, the yield of hydrogen and oxygen increases linearly at a stoichiometric ratio of about 2:1, reaching 158.6 and 67.4 μmol after 140 min of irradiation, respectively. According to experimental characterization and density functional theory calculation, this remarkable performance results from single Ru atoms triggering the electron rearrangement of Ru0.51-CoFe-LDH to engineer active sites and optimize interfacial energetics. Additionally, the negative shift of Ru0.51-CoFe-LDH band edge gives rise to more conspicuous band bending of the n–n junction formed with BiVO4, expediting the separation and transfer of photogenerated electron–hole pairs at the interface. This work furnishes a new preparation perspective for PEC water splitting systems to construct single atoms in the semiconductor substrate.