Amorphous solid

Catalysis

Oxygen evolution

Engineering

Electrochemistry

Materials science

Water splitting

Chemical engineering

Electrocatalyst

Physical chemistry

Nanotechnology

Organic chemistry

Superhydrophilicity

Chemistry

Electrode

Wetting

Photocatalysis

Electrolyte

Bifunctional

Angewandte Chemie International Edition

The development of high-efficiency electrocatalysts for large-scale water splitting is critical but also challenging. In this study, a hierarchical CoMoSx chalcogel was synthesized on a nickel foam (NF) through an in situ metathesis reaction and demonstrated excellent activity and stability in the electrocatalytic hydrogen evolution reaction and oxygen evolution reaction in alkaline media. The high catalytic activity could be ascribed to the abundant active sites/defects in the amorphous framework and promotion of activity through cobalt doping. Furthermore, the superhydrophilicity and superaerophobicity of micro-/nanostructured CoMoSx /NF promoted mass transfer by facilitating access of electrolytes and ensuring fast release of gas bubbles. By employing CoMoSx /NF as bifunctional electrocatalysts, the overall water splitting device delivered a current density of 500 mA cm-2 at a low voltage of 1.89 V and maintained its activity without decay for 100 h.

An Engineered Superhydrophilic/Superaerophobic Electrocatalyst Composed of the Supported CoMoS <sub> <i>x</i> </sub> Chalcogel for Overall Water Splitting

An Engineered Superhydrophilic/Superaerophobic Electrocatalyst Composed of the Supported CoMoS x Chalcogel for Overall Water Splitting

An Engineered Superhydrophilic/Superaerophobic Electrocatalyst Composed of the Supported CoMoS _x Chalcogel for Overall Water Splitting