Fig. 6: Scheme illustration of catalyst characteristics.

The hydrogen binding energy (HBE), water binding energy (WBE), and finally apparent hydrogen binding energy (HBEapp) features of Ni/C, NiCu/C, and NiCuCr/C.

The hydrogen binding energy (HBE), water binding energy (WBE), and finally apparent hydrogen binding energy (HBEapp) features of Ni/C, NiCu/C, and NiCuCr/C.