Graphene boosts green hydrogen production efficiency, study shows

First Graphene has revealed results from an independent study, highlighting the effectiveness of graphene-based electrocatalysts in green hydrogen production. The study found that electrodes made of First Graphene’s metal-oxide doped graphene lowered the amount of power needed to produce green hydrogen.

Analysis by the Centre for Process Innovation UK (CPI) has confirmed metal-oxide doped graphene materials from First Graphene can reduce overpotential, which is a measurement of energy efficiency of the electrolyser, by 43%.

Improvements to the process were also identified that can increase throughput by 64%, reduce raw material costs by 50% and broaden metal oxide options in the product, providing a cost-effective commercial solution for the green hydrogen industry.

The electrocatalysts used in this trial by the CPI are an advancement of First Graphene’s previously developed metal-oxide supercapacitor materials.

The study tested electrodes containing metal-oxide graphene materials in a hydrogen generation cell for overpotential and stability by linear sweep voltammetry and constant current measurements, respectively.

The PureGRAPH®-based electrodes showed overpotential values (at 10 mA/cm²) of 0.175 V for graphene-manganese-oxide and 0.170 V for graphene-ruthenium-manganese-oxide, compared with 0.305 V for commercial ruthenium oxide under similar conditions.

The CPI benchmarked the performance versus literature values for metal oxide and confirmed the graphene-based electrodes provide equivalent performance at lower metal oxide concentrations.

Patent applications have been filed by the company, strengthening the core patent portfolio which is exclusively licensed to the company from the University of Manchester.

This project was funded by the Net-Zero Tees Valley program, which will also allow First Graphene to continue to develop manufacturing know-how for production of the electrode materials.

Michael Bell, Managing Director and CEO of First Graphene, said: “This is an exciting development for First Graphene as we develop our next generation of products that can be used in high value industries that will be part of the solution for decarbonisation. With rapid growth expected in hydrogen production catalysts, these results place First Graphene in a strong position to provide a high-performing, cost-effective, graphene-enhanced solution.”

HTW Editorial Team

HTW Editorial Team

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