The particle-type electrodes with ultra-low electrocatalyst loading (<10μgcm<sup>-2</sup>) were developed as cathodes in the anion exchange membrane water electrolyzer (AEMWE). The Pt-decorated Ni electrocatalysts were prepared on the surface of carbon paper by Ni electrodeposition and subsequent displacement of Ni by Pt; the composition and morphology were controlled by varying HCl concentration. In half cell test, the increase of hydrogen evolution reaction (HER) activity by Pt decoration was confirmed for Pt-Ni/CP-2 that has Pt ratio of 39.4% (1.85μg<inf>Pt</inf>cm<sup>-2</sup>). A membrane electrode assembly employing Pt-Ni/CP-2 as the HER electrode (total catalyst loading: 13.2μgcm<sup>-2</sup>) exhibited a current density of 250mAcm<sup>-2</sup> at 1.9V<inf>cell</inf> (50°C), which is comparable to the previous reports with much larger loading of 3.1~80mgcm<sup>-2</sup>.
- Anion exchange membrane water electrolyzer
- Hydrogen evolution reaction
- Pt-decorated Ni electrocatalyst
- Ultra-low Pt loading
ASJC Scopus subject areas
- Process Chemistry and Technology
- Environmental Science(all)