Nanoporous cobalt-doped AlNi/NiO architecture for high performing hydrogen evolution at high current densities.

Engineering platinum-free catalysts for hydrogen evolution reaction (HER) with high activity and stability is essential for electrochemical hydrogen production. In this paper, we report the synthesis of cobalt-doped AlNi/NiO (Co-AlNi/NiO) electrode with three-dimensional nanoporous structure via chemical dealloying method. Density functional theory (DFT) calculations reveal that Co-AlNi/NiO can accelerate water adsorption / dissociation and optimize adsorption-desorption energies of H* intermediates, thus improving the intrinsic HER activity.

Dealloying-derived nanoporous Sn-doped copper with prior selectivity toward formate for CO electrochemical reduction.

We report nanoporous Cu-Sn catalysts fabricated by chemically dealloying rapid solidified Al-Cu-Sn alloys for the CORR. The np-CuSn catalyst exhibits a three-dimensional interconnected ligament-channel network structure, which can efficiently convert CO to formate with a Faradaic efficiency (FE) of 72.1% at -1.