This timely and comprehensive review mainly summarizes advances in heterogeneous electroreduction of CO2: from fundamentals to value-added products.

A novel OER electrocatalyst, namely oxygen-incorporated amorphous cobalt sulfide porous nanocubes (A-CoS O PNCs), show advantages over the benchmark RuO catalyst in alkaline/neutral medium. Experiments combining with calculation demonstrate that the desirable O* adsorption energy, associated with the distorted CoS O octahedron structure and the oxygen doping, contribute synergistically to the outstanding electrocatalytic activity.

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Electrochemical neutralization energy establishes a bridge for facilitating energy conversion between some chemical energy and electric energy, shedding light on a promising strategy to develop high-performance aqueous electrochemical energy devices.

The ability to reduce the energy consumed and the cost in water splitting is crucial for the generation of hydrogen, which can be stored and then oxidized to deliver clean, abundant, and sustainable energy with the regeneration of water.

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An alkaline-acid Zn-H O fuel cell is proposed for the simultaneous generation of electricity with an open circuit voltage of about 1.25 V and production of H with almost 100 % Faradic efficiency. We demonstrate that, as a result of harvesting energy from both electrochemical neutralization and electrochemical Zn oxidation, the as-developed hybrid cell can deliver a power density of up to 80 mW cm and an energy density of 934 Wh kg and maintain long-term stability for H production with an output voltage of 1.16 V at a current density of 10 mA cm .

The hybrid of cobalt nanoparticles embedded in N-rich carbon nanotubes (Co@NCNT) derived from a Co-based metal–organic framework exhibits outstanding multifunctional electrocatalytic performance toward a set of important electrochemical reactions.