# Photocatalyst sheets: from one SrTiO₃ particle to a 100 m² hydrogen farm

> A survey-map graphical abstract of particulate photocatalysts for overall water splitting: an aerial view of a 100 m² array of panel reactors, with map pins leading to the aluminium-doped SrTiO₃ particle (cocatalysts for hydrogen and oxygen on different facets, 96% external quantum efficiency in the UV), the photocatalyst-sheet panel, and the polyimide membrane that recovers hydrogen safely from the mixed gas.

- Page: https://www.labcanvas.com/templates/graphical-abstracts/photocatalyst-sheets-srtio3-particle-100-m2-hydrogen-farm
- Open in the LabCanvas editor (LabCanvas account): https://www.labcanvas.com/editor.html?template=photocatalyst-sheets-solar-hydrogen-panel-array
- Updated: 2026-10-14
- Category: Graphical abstracts
- Method: Graphical abstract
- Starting materials: Aluminium-doped SrTiO₃ powder with Rh/Cr₂O₃ and CoOOH cocatalysts
- Product: Hydrogen recovered from water and sunlight on a 100 m² panel array
- Key result: EQE up to 96% at 350–360 nm (Takata et al. 2020); STH 0.76% on 100 m² (Nishiyama et al. 2021); STH 1.1% for Z-scheme sheets (Wang et al. 2016)
- Figure: 1920 × 1080 px, 221 editable layers (1 generated objects with settings)

## Steps

1. **A · The particle**: Al-doped SrTiO₃ with Rh/Cr₂O₃ for H₂ and CoOOH for O₂ on different facets: external quantum efficiency up to 96% at 350–360 nm, against typically < 10% before (Takata et al. 2020)
2. **B · The panel**: Powder fixed as sheets in panel reactors; light makes electron–hole pairs that separate and react at the surface (Wang & Domen 2020); the H₂/O₂ product leaves as one moist mixture (Nishiyama et al. 2021); sheets of two photocatalysts on gold reached 1.1% STH (Wang et al. 2016)
3. **C · The separator**: A commercial polyimide membrane recovers H₂ from the moist H₂/O₂ mixture; the system survived intentional ignition of the recovered hydrogen (Nishiyama et al. 2021)
4. **D · The array**: 100 m² of panel reactors ran safely for several months, with a maximum STH of 0.76% (Nishiyama et al. 2021)

## Uses

- Graphical abstracts on photocatalytic water splitting and solar hydrogen
- Talks on scaling up particulate photocatalysts
- Teaching cocatalysts and charge separation

## References

1. Takata et al., “Photocatalytic water splitting with a quantum efficiency of almost unity”, Nature 2020. https://doi.org/10.1038/s41586-020-2278-9 (primary)
2. Nishiyama et al., “Photocatalytic solar hydrogen production from water on a 100-m² scale”, Nature 2021. https://doi.org/10.1038/s41586-021-03907-3 (primary)
3. Wang et al., “Scalable water splitting on particulate photocatalyst sheets with a solar-to-hydrogen energy conversion efficiency exceeding 1%”, Nat. Mater. 2016. https://doi.org/10.1038/nmat4589 (primary)
4. Wang & Domen, “Particulate photocatalysts for light-driven water splitting: mechanisms, challenges, and design strategies”, Chem. Rev. 2020. https://doi.org/10.1021/acs.chemrev.9b00201 (review)

Credit: Drawn by LabCanvas after Takata et al., Nature 2020 (doi:10.1038/s41586-020-2278-9); Nishiyama et al., Nature 2021 (doi:10.1038/s41586-021-03907-3); Wang et al., Nat. Mater. 2016 (doi:10.1038/nmat4589) and Wang & Domen, Chem. Rev. 2020 (doi:10.1021/acs.chemrev.9b00201).

## Questions

**What does the “Photocatalyst sheets: from one SrTiO₃ particle to a 100 m² hydrogen farm” template show?** A survey-map graphical abstract of particulate photocatalysts for overall water splitting: an aerial view of a 100 m² array of panel reactors, with map pins leading to the aluminium-doped SrTiO₃ particle (cocatalysts for hydrogen and oxygen on different facets, 96% external quantum efficiency in the UV), the photocatalyst-sheet panel, and the polyimide membrane that recovers hydrogen safely from the mixed gas.

**What are the steps shown in “Photocatalyst sheets: from one SrTiO₃ particle to a 100 m² hydrogen farm”?** 1. A · The particle: Al-doped SrTiO₃ with Rh/Cr₂O₃ for H₂ and CoOOH for O₂ on different facets: external quantum efficiency up to 96% at 350–360 nm, against typically < 10% before (Takata et al. 2020). 2. B · The panel: Powder fixed as sheets in panel reactors; light makes electron–hole pairs that separate and react at the surface (Wang & Domen 2020); the H₂/O₂ product leaves as one moist mixture (Nishiyama et al. 2021); sheets of two photocatalysts on gold reached 1.1% STH (Wang et al. 2016). 3. C · The separator: A commercial polyimide membrane recovers H₂ from the moist H₂/O₂ mixture; the system survived intentional ignition of the recovered hydrogen (Nishiyama et al. 2021). 4. D · The array: 100 m² of panel reactors ran safely for several months, with a maximum STH of 0.76% (Nishiyama et al. 2021).

**What are the starting materials and the product?** Starting materials: Aluminium-doped SrTiO₃ powder with Rh/Cr₂O₃ and CoOOH cocatalysts. Product: Hydrogen recovered from water and sunlight on a 100 m² panel array.

**Which papers is “Photocatalyst sheets: from one SrTiO₃ particle to a 100 m² hydrogen farm” based on?** Takata et al., “Photocatalytic water splitting with a quantum efficiency of almost unity”, Nature 2020 (doi:10.1038/s41586-020-2278-9); Nishiyama et al., “Photocatalytic solar hydrogen production from water on a 100-m² scale”, Nature 2021 (doi:10.1038/s41586-021-03907-3); Wang et al., “Scalable water splitting on particulate photocatalyst sheets with a solar-to-hydrogen energy conversion efficiency exceeding 1%”, Nat. Mater. 2016 (doi:10.1038/nmat4589); Wang & Domen, “Particulate photocatalysts for light-driven water splitting: mechanisms, challenges, and design strategies”, Chem. Rev. 2020 (doi:10.1021/acs.chemrev.9b00201).

**Can I edit the “Photocatalyst sheets: from one SrTiO₃ particle to a 100 m² hydrogen farm” template?** Yes. Open it in the LabCanvas editor: all 221 layers are editable, including 1 generated objects (structures, plots, equipment) with their own settings. Change the text, colours and layout, then export PNG, TIFF, SVG or PDF.

**Do I need an account to use this template?** Not to view it here. To open and edit it, sign in to LabCanvas or create a free account (the free plan keeps up to 3 designs). Downloading the figure is part of LabCanvas Pro (US$19 a month or US$199 a year).