Prolonged-Photoresponse-Lifetime Ni₂P Nanocrystalline with Highly Exposed (001) for Efficient Photoelectrocatalytic Hydrogen Evolution

Abstract

Seeking highly efficient non-preference electrocatalytic materials that serve photoelectrochemical (PEC) water splitting in acidic systems is expectant in the context of environmentally friendly production. We designed Ni 2 P electrocatalysts synthesized in oil phases via the hot-bubbling method with superb stability in air and sulfuric acid solution for PEC, which were found with excellent hydrogen evolution performance. A tunable particle size and highly exposed (001) planes of Ni 2 P nanocrystals were achieved. The designed catalysts achieved a notable promotion in the hydrogen evolution reaction activity compared to that of Ni 2 P synthesized in the water phase. More specifically, the electrode prepared by self-assembled Ni 2 P nanoparticles was found to have decent overpotential of η 10 = 164 mV in darkness and was further decreased to 129 mV with irradiation of visible light. The cyclic stability tests manifested brilliant durability in 0.5 M H 2 SO 4 . Measurement of the transient photocurrent response and PEC water splitting catalytic performance indicated that the Ni 2 P had high carrier concentration upon irradiation, lower carrier recombination probability, and prolonged photo-response lifetime (3.03−3.14 s).

Selective hydrogenation of phenylacetylene over TiO2 supported Ni2P nanoparticles under visible light irradiation

“…33 In contrast, the strong peaks at 852.6 eV were assigned to Ni δ + (0 < δ + < 1) in the Ni 2 P phase of Ni 2 P/TiO 2 . 34 The Ni 2+ peak of Ni 2 P/TiO 2 moved to 856.3 eV, 0.7 eV higher than that of Ni/TiO 2 , which proves that the electrons transfer from Ni to P. The P 2p spectra of Ni 2 P in Fig. 3c demonstrated that the peak at 129.8 eV conformed to the P–O species on account of the surface oxidation, and 133.9 eV was attributable to the P δ − (0 < δ − < 1) species.…”

A dysprosium(iii)-based triple helical-like complex as a turn-on/off fluorescence sensor for Al(iii) and 4,5-dimethyl-2-nitroaniline

“…The light signal disappeared immediately as the light pulse was switched off, which indicated that the luminescence of 1 was attributed to fluorescence rather than phosphorescence. [40][41][42] When the concentration of 1@EtOH was 10 µM, the luminescence lifetime was fitted by a single exponential function, giving 1.45 ns (Fig. S9 †).…”