Fe incorporation-induced electronic modification of Co-tannic acid complex nanoflowers for high-performance water oxidation

Abstract

The exploration of high-efficiency, cost-effective and earth-abundant non-noble metal electrocatalysts toward oxygen evolution reaction (OER) is of vital importance for the advancement of renewable energy conversion technologies. Herein, we report...

Reactive template-engaged synthesis of Ni-doped Co3S4 hollow and porous nanospheres with optimal electronic modulation toward high-efficiency electrochemical oxygen evolution

“…45 It is worth mentioning that the binding energy peak positions of all Co 2p peaks constantly negatively shift to the lower binding energy region accompanied by the increment of the Ni content, suggesting the markedly modulated electronic structures of Co 3 S 4 by the Ni incorporation. 9,46 From the highresolution Ni 2p region (Fig. 3c), the peaks of metallic Ni 2p 3/2 and Ni 2p 1/2 are positioned at 852.6 and 869.6 eV, respectively.…”

“…[1][2][3][4][5] The oxygen evol-ution reaction (OER), as an indispensable reaction involved in the above energy-related systems, usually suffers from the sluggish kinetics due to the complicated 4e − transfer process and high energy barrier for the formation of the O-O bond. [6][7][8][9] Accordingly, high-efficiency electrocatalysts are essential to reduce the reaction overpotential and promote the reaction rate. [10][11][12] Until now, noble-metal RuO 2 -/IrO 2 -based materials are generally regarded as benchmarks for the OER, while their widespread application is restricted by their high price and scarce abundance.…”

Anti-Fouling, Adhesive Polyzwitterionic Hydrogel Electrodes Toughened Using a Tannic Acid Nanoflower

“…At the same time, the self-polymerization of interlayer TA leads to further dispersion of the clay nanosheets and the formation of the TA@XLG nanoflower structure due to the higher alkalinity around the nanosheets (Figure A). Generally speaking, dopamine and TA form nanoparticles or other morphology of assemblies with a dense surface during oxidation, , while there are few reports of a TA-based nanoflower structure with a pleated surface. , Such a rough pleated surface means that it can provide more noncovalent interaction sites. It is very encouraging.…”

“…Generally speaking, dopamine and TA form nanoparticles or other morphology of assemblies with a dense surface during oxidation, 50,51 while there are few reports of a TA-based nanoflower structure with a pleated surface. 52,53 Such a rough pleated surface means that it can provide more noncovalent interaction sites. It is very encouraging.…”

Alkylamine-Confined Thickness-Tunable Synthesis of Co(OH)2-CoO Nanosheets toward Oxygen Evolution Catalysis

“…Co−O NSs-2 nm shows a higher oxygen defect content (65%) compared with those of Co−O NSs-4 nm (50%) and Co−O NSs-6 nm (45%) (Figure 5b). Furthermore, the strongest electron paramagnetic resonance (EPR) (g = 2.003) radical signal 44,45 also demonstrates the highest O V content of Co−O NSs-2 nm among the three samples (Figure 5c). The electron concentration and conductivity of Co−O NSs were studied through Mott−Schottky analysis of the 0.1 M Na 2 SO 4 electrolyte (Figure 5d).…”