A Pt₁/(Co,Ni)(OH)₂/C single-atom electro-catalyst efficiently splits water for H₂generation,viabalanced water-dissociation and H₂-formation steps from the synergistic effect of surface-defective (Co,Ni)(OH)₂and electronically tuned Pt sites.

Methanol (ME) is a liquid hydrogen carrier, ideal for on-site-on-demand H₂ generation, avoiding its costly and risky distribution issues, but this "ME-to-H₂" electric conversion suffers from high voltage (energy consumption) and competitive oxygen evolution reaction. Herein, we demonstrate that a synergistic cofunctional Pt₁Pd_n/(Ni,Co)(OH)_x catalyst with Pt single atoms (Pt₁) and Pd nanoclusters (Pd_n) anchored on OH-vacancy(V_OH)-rich (Ni,Co)(OH)_x nanoparticles create synergistic triadic active sites, allowing for methanol-enhanced low-voltage H₂ generation. For MOR, OH* is preferentially adsorbed on Pd_n and then interacts with the intermediates (such as *CHO or *CHOOH) adsorbed favorably on neighboring Pt₁ with the assistance of hydrogen bonding from the surface hydrogen of (Ni,Co)(OH)_x. The enhanced selectivity of the *CHOOH pathway, instead of *CO, sustains the MOR activity to a practically high current density. For HER, triadic Pt₁, Pd_n, and OH-vacancy sites on (Ni,Co)(OH)_x create an "acid-base" microenvironment to facilitate water adsorption and splitting, forming H* species on Pt₁ and Pd_n, and *OH at the vacancy, to promote efficient H₂ evolution from the asymmetric Pt₁ and Pd_n sites via the Tafel mechanism. The triadic-site synergy opens new avenues for the design and synthesis of highly efficient and stable cofunctional catalysts for "on-site-on-demand" H₂ production, here facilitated by liquid methanol.

Ru nanoclusters on Ni/Ni(OH)₂ nanoparticles supported on carbon (Ru/Ni/Ni(OH)₂/C) were successfully prepared and characterized. Ru/Ni/Ni(OH)₂/C exhibited an unprecedented catalytic activity for naphthalene hydrogenation at room temperature due to synergetic catalysis.

Pd/CuO-Ni(OH) ₂ /C showed superior electrocatalytic performance for EOR in comparison with PdCuNi alloy/C and Pd/C. In-situ FTIR studies have shown that CuO and Ni(OH) ₂ effectively inhibited the adsorption of CO and increased the breaking rate of C-C.

This work illustrates that the synergistic effect of tiny Ni_cs and Pt_NPs provides a novel strategy for designing highly active and durable electrocatalysts (Pt₁₀/Ni-ZrO₂-NC) for the MOR, HER and the coupling reaction of MOR∥HER.

Pt/rGNP exhibits much higher catalytic properties than other transition metal/rGNP catalysts for hydrogen evolution; its overpotential at 100 mA cm⁻² in 0.5 M H₂SO₄ is only 10.6 mV, and its Tafel slope is 14.53 mV dec⁻¹.