Decoupled electrolysis for hydrogen production and hydrazine oxidation via high-capacity and stable pre-protonated vanadium hexacyanoferrate.

Decoupled electrolysis for hydrogen production with the aid of a redox mediator enables two half-reactions operating at different rates, time, and spaces, which offers great flexibility in operation. Herein, a pre-protonated vanadium hexacyanoferrate (p-VHCF) redox mediator is synthesized. It offers a high reversible specific capacity up to 128 mAh g and long cycling performance of 6000 cycles with capacity retention about 100% at a current density of 10 A g due to the enhanced hydrogen bonding network.

Coupled and collaborative optimization model of impervious surfaces and drainage systems from the flooding mitigation perspective for urban renewal.

Urban pluvial flooding mitigation is a significant challenge in city development. Many mature methods have been used to reduce the risk of flood. The optimal design of impervious surfaces (ODIS) is an adaptive solution to urban flooding from the perspective of urban renewal planning.

Polypyrrole modification on BiVO for photothermal-assisted photoelectrochemical water oxidation.

The bismuth vanadate (BiVO) photoanode receives extensive attention in photoelectrochemical (PEC) water splitting. However, the high charge recombination rate, low electronic conductivity, and sluggish electrode kinetics have inhibited the PEC performance. Increasing the reaction temperature for water oxidation is an effective way to enhance the carrier kinetics of BiVO.

Decoupled Water Electrolysis Driven by 1 cm Single Perovskite Solar Cell Yielding a Solar-to-Hydrogen Efficiency of 14.4 .

Invited for this month's cover is the group of Yubin Chen at Xi'an Jiaotong University as well as collaborators at Shanghai Jiao Tong University. The image shows a decoupled water electrolysis system driven by a single perovskite solar cell (PSC) to produce separated hydrogen and oxygen. The Research Article itself is available at 10.

Decoupled Water Electrolysis Driven by 1 cm Single Perovskite Solar Cell Yielding a Solar-to-Hydrogen Efficiency of 14.4 .

Solar water splitting by photovoltaic (PV) electrolysis is a promising route for sustainable hydrogen production. However, multiple PV cells connected in series are generally required to fulfil the practical electrolytic voltages, which inevitably increases the system complexity and resistance. Decoupled water electrolysis for separate hydrogen and oxygen evolution needs smaller voltage to drive each half-reaction, which provides a feasibility to achieve the single PV cell driven water electrolysis.