Amorphous Ni-P nanoparticles anchoring on nickel foam as an efficient integrated anode for glucose sensing and oxygen evolution

Abstract

Ever-growing efforts have been devoted to developing cost-effective and earth-abundant electrocatalysts with high-performance in biosensing and energy energy conversion. In this work, amorphous nickel-phosphorus (Ni-P) nanoparticles anchoring on Ni foam (Ni-P/NF) were prepared through a facile electroless deposition approach. The morphology and composition were characterized by scanning electron microscopy, x-ray diffraction and x-ray photoelectron spectroscopy. As an integrated anode, Ni-P/NF exhibits high performance towards glucose electrochemical sensing, with a high sensitivity of 13.89 mA mM−1 cm−2, a low detection limit of 1 µM, a wide detection ranges from 2 µM to 0.54 mM, and a quick response (<10 s), as well as good selectivity and reliability for real sample analysis in human serum. In addition to electrocatalytic glucose oxidation, Ni-P/NF shows remarkable catalytic activity towards oxygen evolution reaction (OER) in alkaline solution and it only needs an overpotential of 360 mV to afford 50 mA cm−2. Moreover, Ni-P/NF shows excellent durability under alkaline OER condition. All these results demonstrate Ni-P/NF as highly efficient integrated anode in both biosensing and energy conversion.

A Facile Molecular Approach to Amorphous Nickel Pnictides and Their Reconstruction to Crystalline Potassium‐Intercalated γ‐NiOOHx Enabling High‐Performance Electrocatalytic Water Oxidation and Selective Oxidation of 5‐Hydroxymethylfurfural

“…For both materials, the HR‐TEM images ( Figure a,b) reveal the presence of crystalline nanodomains of 2–4 nm size. [ 78 ] The post‐OER SAED pattern for both NiP and NiAs (Figure 4a,b inset) shows various sharp diffraction rings corresponding to lattice spacings of 2.42, 2.09, and 1.47 Å, which have previously been observed for nickel oxyhydroxide and related phases. [ 31,78 ] Quasi in situ Raman spectra of Ni hydroxides and (oxy)hydroxides were obtained by freeze quenching the samples after exposing them to a constant potential for 24 h (Figure 4c,d).…”

“…[ 78 ] The post‐OER SAED pattern for both NiP and NiAs (Figure 4a,b inset) shows various sharp diffraction rings corresponding to lattice spacings of 2.42, 2.09, and 1.47 Å, which have previously been observed for nickel oxyhydroxide and related phases. [ 31,78 ] Quasi in situ Raman spectra of Ni hydroxides and (oxy)hydroxides were obtained by freeze quenching the samples after exposing them to a constant potential for 24 h (Figure 4c,d). The spectra reveal the presence of two peaks at 478 and 558 cm −1 for both NiP and NiAs, as compared to the absence of any peaks for the as‐prepared materials and those deposited on FTO (Figure 4c,d; Figures S27, S28, Supporting Information).…”

“…The diffraction rings are consistent with gamma nickel oxyhydroxide phases (γ‐NiOOH; JCPDS 6–75). [ 31,78 ] Quasi in situ (resonance) Raman spectroscopy of c) NiP and d) NiAs on FTO collected after OER CP, 24 h, 10 mA cm −2 in Fe‐free alkaline electrolyte and compared to the as‐prepared powders. The stretching A 1g and bending E g vibrational modes of γ‐NiOOH x were observed.…”

“…We further applied our NiP and NiAs precatalysts for the selective anodic oxidation of HMF to the value-added product furandicarboxylic FDCA in 1 m KOH by pairing it with the hydrogen ). [31,78] Quasi in situ (resonance) Raman spectroscopy of c) NiP and d) NiAs on FTO collected after OER CP, 24 h, 10 mA cm −2 in Fe-free alkaline electrolyte and compared to the asprepared powders. The stretching A 1g and bending E g vibrational modes of γ-NiOOH x were observed.…”

Exploration of 3D NiCu-layered double hydroxide flowers tailored on a biomass-derived N-doped carbon stick electrode as a binder-less enzyme-free urea sensing probe

“…[23][24][25] Construction of binder-free sensing probes by directly modifying the electrode surface with electroactive materials would be the ultimate strategy to overcome the aforesaid hitches. [26][27][28][29] This approach not only amplifies the electron transfer kinetics of the sensing electrodes but also reduces the overall fabrication cost and extends its wide applicability for point-of-care detection.…”