Enhancing the efficiency of the hydrogen evolution reaction utilising Fe 3 P bulk modified screen-printed electrodes via the application of a magnetic field.

We report the fabrication and optimisation of Fe 3 P bulk modified screen-printed electrochemical platforms (SPEs) for the hydrogen evolution reaction (HER) within acidic media. We optimise the achievable current density towards the HER of the Fe 3 P SPEs by utilising ball-milled Fe 3 P variants and increasing the mass percentage of Fe 3 P incorporated into the SPEs. Additionally, the synergy of the application of a variable weak (constant) external magnetic field (330 mT to 40 mT) beneficially augments the current density output by 56%. This paper not only highlights the benefits of physical catalyst optimisation but also demonstrates a methodology to further enhance the cathodic efficiency of the HER with the facile application of a weak (constant) magnetic field.