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<p>Photocatalytic H<sub>2</sub> production has been regarded as a charming strategy for harvesting solar energy to chemical energy yet remains a great challenge due to the weak light absorption in visible range, low charge transfer, and fast recombination of photogenerated carriers. Here, we integrate solar-driven water splitting with benzyl alcohol (BA) oxidation, a typical platform chemical from biomass, for producing H<sub>2</sub> and benzaldehyde (BAD) over ZnIn<sub>2</sub>S<sub>4</sub> nanosheets doped with Ni and N (Ni-N/ZIS). Mechanism studies show that Ni-N/ZIS provides a fast charge channel (i.e., Ni–N) for separating photogenerated electrons and holes, as a result of significantly enhanced photocatalytic performance. Impressively, Ni-N/ZIS displays a H<sub>2</sub> productivity of 18.7 mmol g<sup>−1</sup> h<sup>−1</sup> with an apparent quantum yield (AQE) of 29.1% at 420 nm, which is 37.4, 10.6 and 2.8 times higher than that of pristine ZIS, N/ZIS and Ni/ZIS, surpassing all the reported noble metal-free catalysts. Besides, the productivity of BAD reaches 17.5 mmol g<sup>−1</sup> h<sup>−1</sup> under the irradiation of visible light (<i>λ</i> ⩾ 420 nm). This work integrates two significant processes (i.e., solar-driven water splitting with benzyl alcohol oxidation) for producing H<sub>2</sub> and BAD, respectively, which will contribute to alleviating the current energy and environmental crisis.</p>

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Integrating solar-driven water splitting with benzyl alcohol oxidation on ZnIn2S4 with Ni–N channel

  • 期刊论文

  • 发表日期：

    2025年2月7日

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  • Hui-Ping Peng,
  • Ying-Chen Peng,
  • Fei Xue,
  • Ye Yang,
  • Shang-Heng Liu,
  • Xuan Huang,
  • Zhong-Liang Huang,
  • Lin Sun,
  • Hong-Bo Geng,
  • Xiao-Qing Huang,
  • Yong Xu

摘要

Photocatalytic H2 production has been regarded as a charming strategy for harvesting solar energy to chemical energy yet remains a great challenge due to the weak light absorption in visible range, low charge transfer, and fast recombination of photogenerated carriers. Here, we integrate solar-driven water splitting with benzyl alcohol (BA) oxidation, a typical platform chemical from biomass, for producing H2 and benzaldehyde (BAD) over ZnIn2S4 nanosheets doped with Ni and N (Ni-N/ZIS). Mechanism studies show that Ni-N/ZIS provides a fast charge channel (i.e., Ni–N) for separating photogenerated electrons and holes, as a result of significantly enhanced photocatalytic performance. Impressively, Ni-N/ZIS displays a H2 productivity of 18.7 mmol g−1 h−1 with an apparent quantum yield (AQE) of 29.1% at 420 nm, which is 37.4, 10.6 and 2.8 times higher than that of pristine ZIS, N/ZIS and Ni/ZIS, surpassing all the reported noble metal-free catalysts. Besides, the productivity of BAD reaches 17.5 mmol g−1 h−1 under the irradiation of visible light (λ ⩾ 420 nm). This work integrates two significant processes (i.e., solar-driven water splitting with benzyl alcohol oxidation) for producing H2 and BAD, respectively, which will contribute to alleviating the current energy and environmental crisis.