Essential data from our publication in Nature Materials (2022) entitled 3D printed hierarchical pillar array electrodes for high performance semi-artificial photosynthesis. by Xiaolong Chen, Joshua M. Lawrence, Laura Wey, Lukas Schertel, Qingshen Jing, Silvia Vignolini, Chritopher Howe, Sohini Kar-Narayan, Jenny Z. Zhang. Repository contains open access data for publication. Files are in pictures or xls format. These data are electrode (inverse opal indium tin oxide, smooth micropillar indium tin oxide and branched micropillar indium tin oxide) characterizations and photo(electro)chemical output measurements, which IO-ITO electrodes were fabricated using templated synthesis method (Methods/Electrode fabrication/IO-ITO electrodes) and SP-ITO, BP-ITO were fabricated by a 3D printing methodology (Methods/Electrode fabrication/SP-ITO, BP-ITO electrodes). The photo(electro)chemical output measurements were conducted under light/dark cycles at moderate light conditions (red LED light source at λ = 680 nm, THORLABS, white LED light source THORLABS, SM2F32-A) and applied potentials of 0.3 V vs.SHE used in the absence of an exogenous electron mediator, and 0.5 V vs. SHE used in the presence of DCBQ (1 mM) (Methods/Photoelectrochemistry).
The data of Figure 1a, 1e, 1f, 2b insert, 2d, 2e, 3h, S1, S2, S7, S11, S12, S13 are scanning electron microscope images for exploring electrodes morphology. The data for Figure 3c and Figure 3d are light transmittance and reflectance studies of bare electrode in air (Figure 3c) and electrodes incubated with cells using 0° vertical incident white light (1 mW cm–2) (Figure 3d) to understand photonic properties of the electrode. The data for Figure 3e are electrochemical active surface area (EASA) measurements of electrodes (IO-ITO, SP-ITO and BP-ITO) using electrochemical capacitance method. The data for Figure 3f are EASA-normalised Chl a on electrodes (IO-ITO, SP-ITO and BP-ITO) using UV-visible spectrophotometry measurements. The data for Figure 4a, 4b, 4c, 4d are the characterisation results of representative photocurrent profile (Figure 4a), IO-ITO, SP-ITO, BP-ITO electrodes mediated and non-mediated photocurrent performance (Figure 4b), SP-ITO, BP-ITO electrodes non-mediated photocurrent performance (Figure 4c), BP-ITO electrodes mediated photocurrent performance (Figure 4d) to investigate bio-photocurrent output. The data for Figure 5b are statistical analysis results using spearman’s correlation matrix to build up electrode-activity relationship.