Table 2.

Important parameters that should be reported to ensure reproducibility

Catalysts	Electrodes	Electrolysis Cells
Composition of the material (also including impurities)	Composition of the electrode	Compression of the cell
Particle size distribution, polarity	Detailed assembly method incl. ink recipe and preparation	Operation mode of the cell (single pass, semi batch, batch)
Materials morphology, aggregation state	In-plane and through-plane electrical conductivity of the electrode	Membrane used and its pretreatment
Post-mortem analysis of the catalysts via spectroscopy, diffractometry and microscopy methods as well as operando studies to observe any catalyst changes	Data sheet of manufacturer of materials used— link to product or product numbers	Thickness of each individual component (e.g., porous transport layer)
[Approximate cost for 1 g, 1 kg of electrocatalyst]	Porosity, adhesion, surface roughness and lateral homogeneity	Periphery applied (e.g., humidification & purification systems, ion exchange systems used for water purification)
	Water sorption and contact angle	Temperature inside and outside of the cell
	Electrode thickness	Geometry of flow fields used
	Active area of used electrodes—geometric flow rate in respect to active area, reporting on the occurrence of delamination	Measurement protocol
		ICP-OES analysis of the used electrolyte and anolyte
		Schematics of used cells