The Jackfish J4 H-cell helps researchers avoid unintentional redox reactions from occurring by controlling the electrolyte which is in contact with the counter electrode (CE) and working electrode (WE). The electrodes are housed in separate compartments partitioned by a semipermeable membrane so that the electrolyte in each compartment can have a unique composition. Precursors can be selectively introduced into the WE compartment without concern of side reactions at the CE and products from the WE are prevented from participating in further reactions at the CE.

Key Features

• Quartz window provides direct observation of the working electrode surface and also enables the possibility of photochemical experiments
• Included low-profile magnetic stirrer enables studies of mass transport effects
• Multiple ports facilitate the introduction of gases to the cell and accommodate a wide variety of experimental setups

For a complete list of the parts included with the J4, please consult the manual.

Application Note

The Impact of Stirring on the Electrode Microenvironment During eCO2 Reduction (Katharina Trapp)

Product Variants

Several J4 variants are available. The principal choices for the user are:

Choice of cell base material

The J4 cell base is available in two different material types: PTFE and PEEK.

	PTFE	PEEK
Chemical Robustness	The gold standard in chemical inertness and resistance.	Highly chemically resistant, but lower resistance than PTFE. Incompatible with concentrated nitric and sulfuric acids.
Mechanical Strength	Some care must be taken to avoid damaging the threads of the finely tapped holes for contact screws.	More mechanically robust. The threads are less likely to be damaged during assembly.
Rigidity	Soft material which may deform if dropped.	Rigid, non-deformable material.

Choice of ATR element holder

Two holder options are available, depending on which ATR element the user wishes to use. The ATR elements are sold separately.

FAC Holder	Wafer Holder
PIKE Face-Angled Crystals (FACs) have an anti-reflective coating which increases spectral throughput and improves signal to noise. SEIRAS signals are up to twice as strong using the FAC compared to a conventional hemisphere. However, strongly absorbing Si phonon modes impose a low-wavelength cutoff around 1250 cm-1.	The wafer holder accommodates 500 μm thick microgrooved ATR wafers, an inexpensive alternative to larger ATR crystals. The underside of the wafer is patterned with microprisms to enable excellent optical coupling. The low pathlength minimizes throughput loss from Si phonon modes, allowing access to the complete mid-IR spectral range from 5000 to 400 cm-1.

Product Number	Product Name	Cell Base Material	ATR Element Holder
162-4851	J4FP	PEEK	FAC
162-4852	J4WP	PEEK	Wafer
162-4860	J4CP	PEEK	FAC and Wafer (both included)
162-4853	J4FT	PTFE	FAC
162-4854	J4WT	PTFE	Wafer
162-4861	J4CT	PTFE	FAC and Wafer (both included)

ATR Elements

Electrodes

Add-ons

Note: Every J4 cell comes packaged with one top cap purge kit and one magnetic stirrer.