The stabilization of NiCo2O4 nanobelts used for catalyzing triiodides in dye-sensitized solar cells by the presence of RGO sheets

Design of active NiCo2O4‐δ spinel catalyst for abatement of CO‐CH4 emissions from CNG fueled vehicles

“…The lattice of spinel NiCo 2 O 4 imparts extra stability under various catalytic reaction conditions so that it has sustained activity for longer periods whereas; individual metal oxides lose their catalytic activity rapidly due to sintering and carbonaceous deposition. NiCo 2 O 4 , a low‐cost material has tremendous potential for many technological applications other than oxidation reaction such as such as electrode material in super‐capacitors, Li‐ion batteries, Solar cells, and Rechargeable Zn‐air batteries . Most of the studies on spinel, NiCo 2 O 4 materials are devoted to the fields other than heterogeneous catalysis, only a very few are reported on catalysts for the control of vehicular emissions …”

Reactive calcination route for synthesis of active Mn–Co 3 O 4 spinel catalysts for abatement of CO–CH 4 emissions from CNG vehicles

“…23 Cations A and B occupy tetrahedral and octahedral sites respectively in a normal spinel ( Figure 1). Co 3 O 4, homogeneous spinel with variable valence states (Co 21 , Co 31 , and Co 41 ) of metal cations is a promising candidate for oxidation due to its multifold surface lattice oxygen anions. 24,25 The substitution of Co 21 cation in the normal spinel with the other divalent cations (Ni 21 ) is a promising opportunity to increase the catalytic activity due to the presence of highly oxidized redox couples (Co 31 /Co 21 and Ni 31 / Ni 21 ) as well as the synergistic effect of two metals.…”

“…The lattice of spinel NiCo 2 O 4 imparts extra stability under various catalytic reaction conditions so that it has sustained activity for longer periods whereas; individual metal oxides lose their catalytic activity rapidly due to sintering and carbonaceous deposition. NiCo 2 O 4 , a low-cost material has tremendous potential for many technological applications other than oxidation reaction such as such as electrode material in super-capacitors, 29,30 Liion batteries, 31 Solar cells, 32 and Rechargeable Zn-air batteries. 33 Most of the studies on spinel, NiCo 2 O 4 materials are devoted to the fields other than heterogeneous catalysis, only a very few are reported on catalysts for the control of vehicular emissions.…”

Electrochemically Prepared Poly(3,4‐ethylenedioxy‐ thiophene)/Polypyrrole Films with Hollow Micro‐/Nanohorn Arrays as High‐Efficiency Counter Electrodes for Dye‐Sensitized Solar Cells

“…The correlations between the peak current densities and the cycle numbersf or Pt and PEDOT/hPPy CEs are summarized in Figure 5b.R edox peak current densities of both CEs retain stable with increasing cycle number.T his proves that PEDOT/ hPPy has good electrochemical stabilitya nd is tightly bound to the FTO glass surface. [53,19] The photovoltaic performances of DSCs with these CEs were measured (Figure6 and Ta ble 4). The DSC@cPPy shows the lowest J sc , V oc ,F F, and PCE due to its lowest catalytic activities for triiodide reduction, as shown in Figure 7a.S ince the electrolyte can pass throughb oth the outer and inner surfaces of the micro-/nanohorns of DSC@hPPy (Figure 7b), it shows much better photovoltaic performance than DSC@cPPy.H owever,b ecause of the inherentl ow catalytic activity,t he FF of DSC@hPPy is still small, and hence its PCE is lower than that of DSC@Pt.…”