Pt Nanoparticles Supported on Ultrathin Ni(OH)2 Nanosheets for Highly Efficient Reduction of 4-Nitrophenol

The synthesis of highly efficient heterogeneous catalysts with uniformly dispersed noble metal particles and a suitable size is crucial for various industrial applications. However, the high cost rarity metals limit their economic efficiency, making it essential to improve catalytic performance lower loading. Herein, two-step method was developed ~3 nm Pt nanoparticles (NPs), strongly anchored on Ni(OH)2 nanosheets (NSs), which proven by adequate structural characterizations. XPS analysis demonstrated that NSs abundant oxygen vacancies provided sufficient anchor sites NPs prevented agglomeration. Ptn/Ni(OH)2 (n (represents addition amount precursors during synthesis, μmol) = 5, 10, 15, 20) controllable loading were evaluated via reduction 4-nitrophenol 4-aminophenol as model reaction. Pt10/Ni(OH)2 exhibited best activity stability, reaction rate constant 0.02358 s−1 negligible deterioration in ten cycles. This novel synthetic shows potentials noble-metal-supported catalysis.