Graphite Counter Electrode | Graphite Rod Electrode Product Details

Graphite Auxiliary Electrode

Graphite Counter Electrode｜Graphite Rod Electrode

A stable carbon-based counter electrode for electrochemical experiments, materials research and teaching. Multiple diameters, lengths and high-purity graphite rod specifications are available for selection according to cell space, current density and experimental objectives.

Stable conductivityResistant to acidic and alkaline systemsMultiple specificationsResearch-grade consumable

Product Overview

Graphite Rod Counter Electrode

The graphite rod counter electrode closes the current circuit in a three-electrode system and works with the working and reference electrodes for potentiostatic, cyclic voltammetry and chronoamperometry tests. Graphite offers good conductivity, chemical stability and low background interference, making it suitable for aqueous and some organic electrolyte research.

This series covers Φ2–Φ6 mm multipleDiameterand 60–90 mm standardLength，and offers 4×100、5×100、6×100 mm High-Purity Graphite Rod，suitable for routine experiments, apparatus assembly and electrode-holder modification。

MaterialGraphite / High-purity graphite

ConstructionCylindrical rod shape for easy clamping

SystemTwo- or three-electrode systems

SpecificationDiameter、LengthMultiple options available

Specification Comparison

Quickly match the cell according to diameter and length

Category	Diameter / Cross-section	Length	Material & Notes	Recommended application
Graphite Rod Electrode	Φ2 mm	60 / 75 / 90 mm	Graphite Round Rod	Small electrochemical cells and low-current testing
Graphite Rod Electrode	Φ3 mm	60 / 75 / 90 mm	Graphite Round Rod	General three-electrode system
Graphite Rod Electrode	Φ4 mm	60 / 75 / 90 mm	Graphite Round Rod	Routine electrochemical testing
Graphite Rod Electrode	Φ5 mm	60 / 75 / 90 mm	Graphite Round Rod	Higher current or larger liquid surface
Graphite Rod Electrode	Φ6 mm	60 / 75 mm	Graphite Round Rod	Systems requiring a larger effective area
Salt bridgeGraphite Rod Electrode	Φ3 mm	According to the actual product	Graphite rod compatible with salt-bridge structures	Salt bridge and electrochemical cell connection
High-Purity Graphite Rod	4 mm	100 mm	High-purity graphite，one solid rod	materials research and custom machining
High-Purity Graphite Rod	5 mm	100 mm	High-purity graphite，one solid rod	materials research and custom machining
High-Purity Graphite Rod	6 mm	100 mm	High-purity graphite，one solid rod	materials research and custom machining

Note: Determine the actual insertion depth according to the electrolyte level, holder structure and cell dimensions. Ensure the electrode surface is clean and free of cracks before use.

Applications

Suitable for laboratory electrochemical and materials testing

Electrochemical Testing

Cyclic voltammetry (CV) and linear sweep voltammetry (LSV)
Potentiostatic / galvanostatic deposition
Chronoamperometry, impedance and related tests

Materials and Surface Research

Electrocatalysis, electrolysis and corrosion research
Electroplating, anodizing and interface treatment
Small-scale battery and supercapacitor tests

Teaching and apparatus assembly

University chemistry and electrochemistry teaching
Custom electrochemical and flow cells
Sensor and salt-bridge construction support

Usage Instructions

Installation, pretreatment and maintenance

01｜Installation & Connection

Secure the graphite rod in an electrode clip or conductive holder and ensure reliable contact. Keep the effective immersed length stable and avoid direct contact with the working electrode.

02｜Pretreatment Before Use

Before first use or when changing systems, rinse and wipe the surface with deionized water. For organic or high-purity systems, clean and dry with solvent according to laboratory procedures.

03 | Testing and Maintenance

Keep the electrode position unchanged during testing. Remove, rinse and thoroughly dry it immediately after the experiment, and store electrodes from different systems separately to prevent cross-contamination.

FAQ

Selection and Operation Guide

Can the graphite rod electrode be used as a working electrode?

This series is primarily used as a counter electrode to carry the circuit current. If required by the experimental protocol, it may also be used as a working electrode, but the surface condition and area should be reassessed.

How should diameter and length be selected?

Select based on the cell opening, immersion depth and target current. Choose Φ2–Φ3 mm for limited space, or Φ5–Φ6 mm for a larger effective area or higher current capacity. Select a length that can be held securely without touching the bottom.

Can it be used in acidic or alkaline electrolytes?

Graphite is generally suitable for many aqueous electrolytes, but resistance depends on the potential window, temperature, solvent and impurities. Compatibility testing is recommended for strongly oxidizing, high-temperature or highly corrosive systems.

Can it be reused after use?

Yes. Clean and dry it after each experiment and check for powdering, cracks or visible contamination. Replace or recondition it if the surface changes or the background current becomes abnormal.

What is the difference between a salt-bridge graphite rod electrode and a standard graphite rod?

The salt-bridge graphite rod electrode is designed for salt-bridge connections and use with salt bridges or membrane devices. Standard graphite rods are intended for conventional electrode holders. Final selection depends on the cell interface dimensions and assembly method.

Where are high-purity graphite rods suitable?

They are suitable for research requiring low impurity background, high material purity or subsequent CNC machining, including customized electrodes, conductive components and material-performance comparison experiments.

Graphite Auxiliary Electrodes ' Specifications and Prices

ELECTROCHEMICAL RESEARCH SERIES

Graphite Auxiliary Electrodes ' Graphite Rod Electrodes

Research-grade carbon-based counter electrodes in multiple diameters and lengths, suitable for electrochemical testing, teaching experiments and electrochemical cell assembly.

Specifications / Price Comparison

Product	Product Type	Specification	Application	Price (USD)
Graphite auxiliary electrode	Graphite rod electrode	Φ2 × 60 mm	Miniature electrochemical cell	$21
		Φ2 × 75 mm	Miniature electrochemical cell	$22
		Φ2 × 90 mm	Miniature electrochemical cell	$26
		Φ3 × 60 mm	Standard testing	$14
		Φ3 × 75 mm	Standard testing	$14
		Φ3 × 90 mm	Standard testing	$14
		Φ4 × 60 mm	Standard testing	$14
		Φ4 × 75 mm	Standard testing	$14
		Φ4 × 90 mm	Standard testing	$14
		Φ5 × 60 mm	Larger active area	$14
		Φ5 × 75 mm	Larger active area	$14
		Φ5 × 90 mm	Larger active area	$14
		Φ6 × 60 mm	Larger active area	$14
		Φ6 × 75 mm	Larger active area	$14
	Salt bridge graphite rod electrode	Salt bridge graphite rod, Φ3 mm	Salt bridge connection	$38
	High-purity graphite rod	4 × 100 mm (1 solid rod)	Materials research / customization	$10
		5 × 100 mm (1 solid rod)	Materials research / customization	$10
		6 × 100 mm (1 solid rod)	Materials research / customization	$10

Note: Prices apply only to the specifications listed above. Confirm the effective immersion length, clamping method and electrolyte compatibility according to your experimental setup.

Purchase Channels

Amazon

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eBay

Suitable for laboratory purchases, research projects and long-term use.

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AliExpress

Contact us for custom dimensions, non-standard designs or compatible equipment.

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Partial references citing our materials (from Google Scholar)

Google Scholar - SCI Materials Hub.jpg

Carbon Dioxide Reduction

1. ACS Nano Strain Relaxation in Metal Alloy Catalysts Steers the Product Selectivity of Electrocatalytic CO₂ Reduction

The bipolar membrane (Fumasep FBM) in this paper was purchased from SCI Materials Hub, which was used in rechargeable Zn-CO₂ battery tests. The authors reported a strain relaxation strategy to determine lattice strains in bimetal MNi alloys (M = Pd, Ag, and Au) and realized an outstanding CO₂-to-CO Faradaic efficiency of 96.6% with outstanding activity and durability toward a Zn-CO₂ battery.

2. Front. Chem. Boosting Electrochemical Carbon Dioxide Reduction on Atomically Dispersed Nickel Catalyst

In this paper, Vulcan XC-72R was purchased from SCI Materials Hub. Vulcan XC 72R carbon is the most common catalyst support used in the anode and cathode electrodes of Polymer Electrolyte Membrane Fuel Cells (PEMFC), Direct Methanol Fuel Cells (DMFC), Alkaline Fuel Cells (AFC), Microbial Fuel Cells (MFC), Phosphoric Acid Fuel Cells (PAFC), and many more!

3. Adv. Mater. Partially Nitrided Ni Nanoclusters Achieve Energy-Efficient Electrocatalytic CO₂ Reduction to CO at Ultralow Overpotential

An AEM membrane (Sustainion X37-50 Grade RT, purchased from SCI Materials Hub) was activated in 1 M KOH for 24 h, washed with ultra-purity water prior to use.

4. Adv. Funct. Mater. Nanoconfined Molecular Catalysts in Integrated Gas Diffusion Electrodes for High-Current-Density CO₂ Electroreduction

In this paper (Supporting Information), an anion exchanged membrane (Fumasep FAB-PK-130 obtained from SCI Materials Hub (www.scimaterials.cn)) was used to separate the catholyte and anolyte chambers.

SCI Materials Hub: we also recommend our Fumasep FAB-PK-75 for the use in a flow cell.

5. Appl. Catal. B Efficient utilization of nickel single atoms for CO₂ electroreduction by constructing 3D interconnected nitrogen-doped carbon tube network

In this paper, the Nafion 117 membrane was obtained from SCI Materials Hub.

6. Vacuum Modulable Cu(0)/Cu(I)/Cu(II) sites of Cu/C catalysts derived from MOF for highly selective CO₂ electroreduction to hydrocarbons

In this paper, Proton exchange membrane (Nafion 117), Nafion D520, and Toray 060 carbon paper were purchased from SCI Materials Hub.

7. National Science Review Confinement of ionomer for electrocatalytic CO2 reduction reaction via efficient mass transfer pathways

An anion exchange membrane (PiperION-A15-HCO3) was obtained from SCI Materials Hub.

8. Catalysis Communications Facilitating CO2 electroreduction to C2H4 through facile regulating {100} & {111} grain boundary of Cu2O

Carbon paper (TGPH060), membrane solution (Nafion D520), and ionic membrane (Nafion N117) were obtained from Wuhu Eryi Material Technology Co., Ltd (a company under SCI Materials Hub).

Batteries

1. J. Mater. Chem. A Blocking polysulfides with a Janus Fe3C/N-CNF@RGO electrode via physiochemical confinement and catalytic conversion for high-performance lithium–sulfur batteries

Graphene oxide (GO) in this paper was obtained from SCI Materials Hub. The authors introduced a Janus Fe3C/N-CNF@RGO electrode consisting of 1D Fe3C decorated N-doped carbon nanofibers (Fe3C/N-CNFs) side and 2D reduced graphene oxide (RGO) side as the free-standing carrier of Li2S6 catholyte to improve the overall electrochemical performance of Li-S batteries.

2. Joule A high-voltage and stable zinc-air battery enabled by dual-hydrophobic-induced proton shuttle shielding

This paper used more than 10 kinds of materials from SCI Materials Hub and the authors gave detailed properity comparsion.

The commercial IEMs of Fumasep FAB-PK-130 and Nafion N117 were obtained from SCI Materials Hub.

Gas diffusion layers of GDL340 (CeTech) and SGL39BC (Sigracet) and Nafion dispersion (Nafion D520) were obtained from SCI Materials Hub.

Zn foil (100 mm thickness) and Zn powder were obtained from the SCI Materials Hub.

Commercial 20% Pt/C, 40% Pt/C and IrO2 catalysts were also obtained from SCI Materials Hub.

3. Journal of Energy Chemistry Vanadium oxide nanospheres encapsulated in N-doped carbon nanofibers with morphology and defect dual-engineering toward advanced aqueous zinc-ion batteries

In this paper, carbon cloth (W0S1011) was obtained from SCI Materials Hub. The flexible carbon cloth matrix guaranteed the stabilization of the electrode and improved the conductivity of the cathode.

4. Energy Storage Materials Defect-abundant commercializable 3D carbon papers for fabricating composite Li anode with high loading and long life

The 3D carbon paper (TGPH060 raw paper) were purchased from SCI Materials Hub.

5. Nanomaterials A Stable Rechargeable Aqueous Zn–Air Battery Enabled by Heterogeneous MoS2 Cathode Catalysts

Nafion D520 (5 wt%), and carbon paper (GDL340) were received from SCI-Materials-Hub.

6. SSRN An Axially Directed Cobalt-Phthalocyanine Covalent Organic Polymer as High-Efficient Bifunctional Catalyst for Zn-Air Battery

Carbon cloth (W0S1011) and other electrochemical consumables required for air cathode were provided by SCI Materials Hub.

Oxygen Reduction Reaction

1. J. Chem. Eng. Superior Efficiency Hydrogen Peroxide Production in Acidic Media through Epoxy Group Adjacent to Co-O/C Active Centers on Carbon Black

In this paper, Vulcan XC 72 carbon black, ion membrane (Nafion N115, 127 μL), Nafion solution (D520, 5 wt%), and carbon paper (AvCarb GDS 2230 and Spectracarb 2050A-1050) were purchased from SCI Materials Hub.

2. Journal of Colloid and Interface Science Gaining insight into the impact of electronic property and interface electrostatic field on ORR kinetics in alloy engineering via theoretical prognostication and experimental validation

The 20 wt% Pt3M (M = Cr, Co, Cu, Pd, Sn, and Ir) were purchased from SCI Materials Hub. This work places emphasis on the kinetics of the ORR concerning Pt3M (M = Cr, Co, Cu, Pd, Sn, and Ir) catalysts, and integrates theoretical prognostication and experimental validation to illuminate the fundamental principles of alloy engineering.

Water Electrolysis

1. International Journal of Hydrogen Energy Gold as an efficient hydrogen isotope separation catalyst in proton exchange membrane water electrolysis

The cathodic catalysts of Pt/C (20 wt%, 2–3 nm) and Au/C (20 wt%, 4–5 nm) were purchased from SCI Materials Hub.

2. Small Science Silver Compositing Boosts Water Electrolysis Activity and Durability of RuO2 in a Proton-Exchange-Membrane Water Electrolyzer

Two fiber felts (0.35 mm thickness, SCI Materials Hub) were used as the porous transport layers at both the cathode and the anode.

3. Advanced Functional Materials Hierarchical Crystalline/Amorphous Heterostructure MoNi/NiMoOx for Electrochemical Hydrogen Evolution with Industry-Level Activity and Stability

Anion-exchange membrane (FAA-3-PK-130) was obtained from SCI Materials Hub website.

Fuel Cells

1. Polymer Sub-two-micron ultrathin proton exchange membrane with reinforced mechanical strength

Gas diffusion electrode (60% Pt/C, Carbon paper) was purchased from SCI Materials Hub.

Characterization

1. Chemical Engineering Journal Electrochemical reconstitution of Prussian blue analogue for coupling furfural electro-oxidation with photo-assisted hydrogen evolution reaction

An Au nanoparticle film was deposited on the total reflecting plane of a single reflection ATR crystal (SCI Materials Hub, Wuhu, China) via sputter coater.

Graphite Rod Electrode