In Situ Infrared Spectroelectrochemical Cell Model: EC-IR1 / EC-IR2

In Situ Infrared Spectroelectrochemical Cell EC-IR1 / EC-IR2 H-type in situ infrared spectroelectrochemical cells with internal- and external-reflection configurations for real-time interfacial analysis. Product Overview The EC-IR1 / EC-IR2 are in situ infrared spectroelectrochemical cells for real-time analysis of electrode interfaces and reaction intermediates. EC-IR1 supports internal-reflection ATR-SEIRAS with an Au-coated Si working substrate and bottom magnetic stirring, while EC-IR2 supports external-reflection IRRAS with a micrometer-adjustable Ø10 mm glassy carbon electrode for precise control of the thin electrolyte layer and reflected signal. Key Features Internal- and External-Reflection Options EC-IR1 supports internal-reflection ATR-SEIRAS, while EC-IR2 supports external-reflection IRRAS. Membrane-Separated Two-Chamber Design H-type dual chambers with a replaceable membrane and independent gas inlet/outlet ports. Model-Specific Interface Control EC-IR1 provides bottom magnetic stirring, while EC-IR2 uses micrometer adjustment for precise control of the thin electrolyte layer and reflected signal. Technical Specifications Item Specification Chamber structure Two-chamber Electrode system Three-electrode Reflection configuration Internal reflection (EC-IR1), external reflection (EC-IR2) Cell volume < 20 mL Working electrode Au-coated Si (EC-IR1); Ø10 mm glassy carbon (EC-IR2) Counter electrode Graphite electrode Reference electrode Ag/AgCl electrode Optical window material Single-crystal Si (EC-IR1); Ge, ZnSe, CaF₂, or Si (EC-IR2) Cell body material PEEK Typical Applications Electrode-Interface Analysis In situ monitoring of adsorbed species, surface intermediates and electrolyte interactions under potential control. Electrocatalytic Mechanism Studies Investigating reaction pathways in CO₂RR, ORR, OER, HER and other electrochemical processes. Catalyst Surface Comparison Evaluating the effects of catalyst composition, crystal facets and surface modification on interfacial adsorption. Reflection-Mode FTIR Studies Internal-reflection ATR-SEIRAS measurements with EC-IR1 and external-reflection IRRAS measurements with EC-IR2. Model Selection Guide EC-IR1 – Internal Reflection An internal-reflection configuration using an Au-coated single-crystal Si working electrode with bottom magnetic stirring. Recommended for surface-enhanced in situ infrared measurements of adsorbed species and reaction intermediates at the electrode–electrolyte interface. Ideal for catalyst-coated Au/Si substrates requiring surface-sensitive detection and controlled electrolyte mixing. EC-IR1 Internal-Reflection ATR-SEIRAS Schematic EC-IR2 – External Reflection An external-reflection configuration using a Ø10 mm glassy carbon working electrode with integrated micrometer adjustment. The working-electrode-to-optical-crystal distance can be precisely adjusted to control the infrared electrolyte-layer thickness and reflected signal intensity. Ideal for catalyst-coated glassy carbon electrodes and tunable thin-layer measurements. EC-IR2 External-Reflection IRRAS Schematic EC-IR1 Cell View EC-IR2 Cell View EC-IR1 Mounted on VeeMAX III EC-IR2 Mounted on VeeMAX III Required Optical Accessory The EC-IR1 / EC-IR2 are designed for use with the PIKE Technologies VeeMAX III Variable Angle Specular Reflectance Accessory. Its all-reflective optical design provides adjustable incidence angles for precise beam alignment in internal- and external-reflection FTIR measurements. For ATR configurations, optical throughput can exceed 50% with a 45° ZnSe crystal, with a penetration depth of 0.4–46 µm depending on the crystal and sample. The VeeMAX III is required for operation and is sold separately. Please specify the FTIR spectrometer brand and model when ordering. Item Specification Manufacturer PIKE Technologies Model VeeMAX III Incidence angle 30°–80° Accessory dimensions W177 × D92 × H162 mm Published Application Example Facet-Dependent CO Adsorption during CO₂ Electroreduction The EC-IR1 was employed for internal-reflection ATR-SEIRAS measurements of adsorbed CO intermediates on Cu films with different facet exposure during CO₂ electroreduction. Using a catalyst-coated Au/Si working electrodes in 0.1 M KOH, potential-dependent spectra distinguished reactive linearly bonded CO (COₗ, ~2050 cm⁻¹) from bridge-bonded CO (COᵦ, ~1800 cm⁻¹). The results revealed higher *CO coverage on Cu(100)-rich HRS-Cu, supporting enhanced C-C coupling toward C₂+ products. Separate flow-cell tests achieved Faradaic efficiencies of 58.6% for ethylene and 86.6% for C₂+ products. Demonstrated EC-IR1 Capabilities Supports internal-reflection ATR-SEIRAS using catalyst-coated Au/Si working electrodes. Enables potential-dependent tracking of interfacial adsorbates, including linearly and bridge-bonded CO species. Supports comparative investigation of catalyst facets, surface coverage and electrochemical reaction pathways. Ongoing Application Studies Additional application studies using the EC-IR1 / EC-IR2 are currently underway. Product Identification Note: EC-IR1 is the Beyond Battery product code for the same cell reported in the cited publications. The original articles use a different product designation.