Enhanced Bifunctional Electrocatalysis for Zinc-Air Battery Using Porous Conductive Substrate with Abundant Anchoring Sites.

Efficient and robust bifunctional electrocatalysts for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are critical for high-performance zinc-air batteries (ZABs). However, balancing OER and ORR activity in a single catalyst remains challenging due to the different mechanisms during charging and discharging. Here, a scalable strategy is presented for enhancing both reactions by integrating two-dimensional OER- and ORR-active components onto a carbon-based conductive substrate with abundant anchoring sites, via high-shear exfoliation.

Nickel Hydroxide Catalyzed Bias-free Photoelectrochemical NH Production via Nitrate Reduction.

The photoelectrochemical nitrate reduction reaction (PEC NORR) potentially converts nitrate, a major water pollutant, into NH, which is an eco-friendly, next-generation energy source. However, achieving high efficiency in the PEC NORR has been challenging because of the need for high applied voltage and competition with the hydrogen evolution reaction (HER). In this study, a PEC NORR is successfully implemented that demonstrated a high NH production rate of 2468 µg cm h (at -0.

Homogeneously Mixed Cu-Co Bimetallic Catalyst Derived from Hydroxy Double Salt for Industrial-Level High-Rate Nitrate-to-Ammonia Electrosynthesis.

Electrocatalytic nitrate reduction reaction (NORR) presents an innovative approach for sustainable NH production. However, selective NH production is hindered by the multiple intermediates involved in the NORR process and the competitive hydrogen evolution reaction. Hence, the development of highly efficient NORR catalysts is paramount.

High-Performance Electrochemical and Photoelectrochemical Water Splitting at Neutral pH by Ir Nanocluster-Anchored CoFe-Layered Double Hydroxide Nanosheets.

Highly efficient electrocatalysts for the oxygen evolution reaction (OER) in neutral electrolytes are indispensable for practical electrochemical and photoelectrochemical water splitting technologies. However, there is a lack of good, neutral OER electrocatalysts because of the poor stability when H accumulates during the OER and slow OER kinetics at neutral pH. Herein, we report Ir species nanocluster-anchored, Co/Fe-layered double hydroxide (LDH) nanostructures in which the crystalline nature of LDH-restrained corrosion associated with H and the Ir species dramatically enhanced the OEC kinetics at neutral pH.

High-performance and stable photoelectrochemical water splitting cell with organic-photoactive-layer-based photoanode.

Considering their superior charge-transfer characteristics, easy tenability of energy levels, and low production cost, organic semiconductors are ideal for photoelectrochemical (PEC) hydrogen production. However, organic-semiconductor-based photoelectrodes have not been extensively explored for PEC water-splitting because of their low stability in water. Herein, we report high-performance and stable organic-semiconductors photoanodes consisting of p-type polymers and n-type non-fullerene materials, which is passivated using nickel foils, GaIn eutectic, and layered double hydroxides as model materials.