Microscopy Morphology

Dynamic light scattering (DLS)

Co3(HITP)2 powder · Powder

Catalyst powder probe-sonicated in IPA and measured at room temperature on a Malvern Zetasizer Nano ZSP.

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Average flake size	average particle size of 272 nm	—	—	Text Exact Reported	p.24435 · Results and Discussion · Figure 1A
Dominant flake size range	most particles ranging between 300 and 400 nm	—	300-400 nm	Text Range	p.24435 · Results and Discussion · Figure 1A

Co3(HITP)2 powder · Powder

SEM on JEOL JSM-IT500HR; STEM/EELS on aberration-corrected JEOL JEM-ARM200CF at 80 kV with C K, N K, O K and Co L edge maps.

Geometry: Powder flakes; Figure 1 scale bars include 500 nm SEM and 50 nm STEM/EELS maps.
Context: pristine Co3(HITP)2 powder
Measurement source: S2-S3 · Materials Characterization; STEM · Figure 1B-D

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
STEM-EELS chemical homogeneity	High chemical homogeneity across C K, N K, O K and Co L edge maps	—	—	Text Qualitative	p.24435 · Results and Discussion · Figure 1D
SEM flake morphology	SEM shows Co3(HITP)2 flakes with high surface area suitable for electrocatalysis	—	—	Qualitative Qualitative	p.24435 · Results and Discussion · Figure 1B
STEM-HAADF 2D flake-type morphology	2D flake-type morphology; folded/bent sheets appear as wires in projected STEM-HAADF images	—	—	Text Qualitative	p.24435 · Results and Discussion · Figure 1C