Fig. 3: The reversible solar-driven H2 storage performance of MgH2 catalyzed by CuNi alloys.
a UV–vis–NIR absorption spectra of MgH2 under the catalysis of Cu1Ni1, Cu1Ni2, Cu1Ni3, Ni, and Cu after rehydrogenation. The inset shows the color of their cycled states. b UV–vis–NIR absorption spectra of MgH2 under the catalysis of Cu1Ni1, Cu1Ni2, and Cu1Ni3 after cycling, in comparison with their pristine ball-milled states (before cycling). The inset exhibits solar irradiation distribution of natural sunlight. c The signal data of temperature to light irradiation of MgH2 after cycling under the catalysis of Cu1Ni1, Cu1Ni2, Cu1Ni3, Ni, and Cu, respectively, with their pristine ball-milled states (before cycling) included for comparison. The shaded tan area corresponds to the values under 3.5 W cm−2 and the half-filled triangles represent to the absolute temperature variation. d The response of temperature with corresponding H2 desorption curves of MgH2 under the catalysis of Cu1Ni1 under 2.6 W cm−2 before and after cycling. e Cycling H2 desorption curves of MgH2 under the catalysis of Cu1Ni1 using a light intensity of 3.5 W cm-2. The de1 to de10 represent the 1st to the 10nd dehydrogenation of cycles. Source data are provided as a source data file.
