Hierarchical flower-like nickel phenylphosphonate microspheres and their calcined derivatives for supercapacitor electrodes

Abstract

For the first time, hierarchical flower-like nickel phenylphosphonate microspheres were synthesized and applied as a high performance electrode material for pseudocapacitors.

Calcined Nickel‐Cobalt Mixed Metal Phosphonate with Efficient Electrocatalytic Activity for Oxygen Evolution Reaction

“…As shown in Figure (b), two major peaks at binding energy of 781.7 eV and 797.8 eV pertain to Co2p 3/2 and Co 2p 1/2 peaks, which can be vested in Co 2+ ,,. In Figure (c), in the Ni 2p spectrum, we can ascribe two peaks at 873.7 eV and 856.4 eV to Ni 2p 1/2 and Ni 2p 3/2 , respectively ,. For the peak of P 2P in 133.2 eV (Figure d), demonstrating that the P atoms are +5 oxidation state.…”

“…51–2096); And for CoNiPP, as a result of the addition of nickel element, CoNiPP should have Co(O 3 PC 6 H 5 )⋅H 2 O and Ni(O 3 PC 6 H 5 )⋅H 2 O (JCPDS No. 49–2391) compositions . Figure S2 (see Supporting Information) shows XRD patterns of CoPP−T (T=600, 900 °C) and CoNiPP−T (T=600, 900 °C).…”

“…Xin Shi et al. designed and synthesized the flower‐like nickel phenylphosphonate microspheres, their pyrolysis products were suitable as supercapacitor electrode material . Furthermore, the addition of two or more transition metal elements (such as Ni, Fe, Se) is an effective way to improve electronic migration and conductivity of catalysts …”

Iron Doping Effect for Oxygen Evolution Hybrid Catalysts based on Nickel Phosphate/Nitrogen‐Doped Carbon Nanoflakes

“…The high resolution XPS spectra for Ni 2p is shown in Figure b, the peaks at 856.9 and 862.5 eV are assigned to Ni 2p 3/2 binding energy, which can be ascribed to Ni 2+ in nickel phosphates and satellite peak, respectively. The peaks in the region of 870 to 880 eV are attributed to Ni 2p 1/2 , which follow similar rules as the Ni 2p 3/2 peaks . The Fe 2p spectra exhibits two broad peaks, which correspond to Fe 2p 3/2 and Fe 2p 1/2 states.…”

Microsphere Assemblies via Phosphonate Monoester Coordination Chemistry

“…[14,15] By loweringt he degrees of freedom of the ligatingg roup, phosphonatee sters are more likely to form open frameworks and crystalline materials over phosphonates. [26][27][28][29] While these techniques have showns ome success, it is still difficult to control the morphologyo fp hosphonate-based MOFs due to the rapid bond formation. [17] Most of the research in the MOF field has centered around the formationof bulk, crystalline powders, although there has been some shift to form nano-or microstructured materials with uniform size and shape.F or gas sorption applications, a sorbent powder needs as tructured form (e.g.…”