Electrocatalytic performances of g-C3N4-LaNiO3 composite as bi-functional catalysts for lithium-oxygen batteries

Abstract

A low cost and non-precious metal composite material g-C3N4-LaNiO3 (CNL) was synthesized as a bifunctional electrocatalyst for the air electrode of lithium-oxygen (Li-O2) batteries. The composition strategy changed the electron structure of LaNiO3 and g-C3N4, ensures high Ni3+/Ni2+ ratio and more absorbed hydroxyl on the surface of CNL that can promote the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The composite catalyst presents higher activities than the individual components g-C3N4 and LaNiO3 for both ORR and OER. In non-aqueous Li-O2 batteries, CNL shows higher capacity, lower overpotentials and better cycling stability than XC-72 carbon and LaNiO3 catalysts. Our results suggest that CNL composite is a promising cathode catalyst for Li-O2 batteries.

Nitrogen Functionalized Few Layer Graphene Derived from Metal-Organic Compound: A Catalyst for Oxygen Reduction Reaction

“…7(a) shows the LSVs recorded using RDE. ORR performance of g-C3N4/C corroborates well with literature [51]. Onset potential of G-TZ-Co is positive (0.89 V vs.…”

“…Table 1 compares the ORR activity of the G-TZ-Co with g-C3N4 based catalyst. The ORR activity of G-TZ-Co measured at 0.85 ViR-free is comparable [9,53,54] and better than [13,24,44,51] many catalysts reported in Table 1.…”

Efficient Photocatalytic Bilirubin Removal over the Biocompatible Core/Shell P25/g-C3N4 Heterojunctions with Metal-free Exposed Surfaces under Moderate Green Light Irradiation

“…During the process, the commercially available P25 TiO 2 nanoparticles was considered as a host and template for the self-assembly of g-C 3 N 4 nanosheets, while the cheap and recyclable melamine was used as the sole dispersion liquid. As reported, in methanol, stack- layered g-C 3 N 4 can easily be exfoliated into thin nanosheets, which are prone to a rolling and regrowth process14. In this impregnation, the g-C 3 N 4 nanosheets could curl up and wrap around the P25 TiO 2 nanoparticles to minimize the total interfacial energy, and then reassemble into a homogeneous coating layer after the methanol was removed by the air stream.…”

“…Interestingly, the photocatalytic activity of g-C 3 N 4 can be significantly improved by incorporating g-C 3 N 4 with other semiconductors (e.g. g-C 3 N 4 /TiO 2 and g-C 3 N 4 /AgCl) to form photocatalytic heterojunctions14151617. Thus, g-C 3 N 4 inspired low-toxicity semiconductor heterojunctions are a good choice for phototherapy of jaundice.…”

Perovskite Oxide LaNiO3 Nanoparticles for Boosting H2 Evolution over Commercial CdS with Visible Light

“…In the La 3d core-level spectrum (Figure 3b), the splittings of the main peaks of La 3d 5/2 and La 3d 3/2 are at around835.9 and 854.7 eV,coupled with the corresponding shake-up satellite peaks at approximately 838.5 and 855.9 eV,r espectively,w hich is characteristic of the La 3 + cation. [38,39] In addition, the peaks at around861.9 and 879.4 eV are indexed to the two satellite peaks of nickel. [38,39] In addition, the peaks at around861.9 and 879.4 eV are indexed to the two satellite peaks of nickel.…”