“Nano-garden cultivation” for electrocatalysis: controlled synthesis of Nature-inspired hierarchical nanostructures

Abstract

The rational coupling of hydrothermal and electrodeposition approaches enables controlled synthesis of various CoP Nature-inspired nanostructures with distinct electrocatalytic performance.

A membrane-free flow electrolyzer operating at high current density using earth-abundant catalysts for water splitting

“…CoP also experienced oxidation and the formation of oxyhydroxide during the OER cycle, in agreement with scenario observed in the literature, yet the phosphide peaks at 779.4 and 794.5 eV were still observed in Supplementary Fig. 15b [51][52][53][54][55][56] . This might be ascribed to the electronegativity difference of CoP and FeP.…”

Operando Studies of Electrochemical Denitrogenation and Its Mitigation of N-Doped Carbon Catalysts in Alkaline Media

“…From the mechanistic point of view, if the oxidation reaction sites could be mitigated away from the surface of NC, the corrosion might be alleviated. One of the most straightforward, and also commonly applied in the literature, approaches of optimizing NC is to form a hybrid structure with a second phase such as oxides, sulfides, or phosphides. , Indeed, this strategy has been proven with excellent efficiency in terms of boosting the catalytic activity of NC in reactions such as OER and ORR. , But the remaining question is: can we really suppress the denitrogenation and corrosion of NC under high anodic potentials in this structure? This intuitive question comes from two seemingly contradictory facts: on one hand, transferring the oxidation reaction sites from NC to the secondary phase would naturally suppress the corrosion of NC; on the other hand, the secondary active phase, e.g., Pt, might catalyze the oxidation of the carbon support at the interface.…”

Electrochemical preparation of nano/micron structure transition metal-based catalysts for the oxygen evolution reaction

“…The superior electrocatalytic activity of the electrodeposits could be attributed to the (i) morphological openness of the electrodeposits, which provided better accessibility of the active species to the active site and (ii) better charge transfer efficiency across the electrode–electrolyte interface. By simply manipulating (electro)chemical gradients using a combined hydrothermal and electrodeposition strategy, Yan et al 120 showed the controlled growth of Co(OH) 2 nanostructures, mimicking the process of garden cultivation (Fig. 8c).…”

“…Copyright 2021, Elsevier. (c) A schematic illustration of the steps of nanogarden cultivation process on carbon cloth and a false color SEM image of CoP nanoflowers 120. Copyright 2020, The Royal Society of Chemistry.…”