Nuclear magnetic resonance (NMR) spectroscopy combined with electrochemical (EC) methods provides crucial insight into processes at and near the electrode surface at the molecular level. This technique allows acquisition of NMR spectra while controlling an electrical potential at the working electrode, to characterise electrochemically generated species. The EC NMR cell consists of three major parts: (a) 5 mm OD glass NMR tube with tube stopper, (b) electrochemical cell with the electrode assembly, and (c) cell holder of various dimensions depending on the NMR system. The electrode assembly is an inset for a standard 5 mm OD NMR tube and may be configured in various ways. Electrode leads inside the cell are insulated with PTFE tubes to avoid short circuit. Chokes integrated in the electrical leads reduce the encountered interference between the NMR spectrometer and the potentiostat. Cell elements are constructed with the following materials: metallic (Tantalum, Silver, Platinum, Copper, Aluminium, Gold, Brass) and non-metallic (PTFE, PEEK, FEP, FFKM, NMR glass, Nylon, PVC). It fits aqueous (FKM O-Rings) and organic solvent (FFKM O-Rings) electrolyte requirements. The construction is gas-tight.

WARNING: The spinning mode is not allowed as it would disrupt connections and may damage the NMR system. The EC NMR cell must be installed manually without the automatic sample changer.

Application note In-situ EC-NMR is a powerful method for structural analysis and dynamic investigation of chemical reaction systems. It provides information about the concentration of reactants and products in real-time. It may also be used to study magnetoelectrolysis phenomenon. The tube should be filled with electrolyte up to 50 mm of the height. Bubbling of gas through the solution must be stopped prior to experiment.

Product includes

• 1 x lid, 1 x chamber, 1 x tube fixture, 1 x tube stopper, 1 x set of screws
• 1 x Precision Sample NMR Tube (Wilmad 505-PS-7, 5 mm OD, 0.38 mm wall, 7'' long, class A)
• 1 x Metal wire auxiliary electrode 175HX25 0.6/300 mm, Platinum
• 1 x Pseudo-Reference Electrode PRW 0.4/220 mm, Silver/PTFE
• 5 x Tantalum wire clip 0.6/220 mm
• 1 x customised cell holder, Aluminium
• 1 x customised 3 wire electrical lead (no RF chokes)
• 1 x set of PTFE tubes for gas inlet/outlet