Unbiased Stable Photoelectrochemical Glycerol Oxidation on Hematite Photoanodes.

Photoelectrochemical glycerol oxidation reaction (PEC GOR) is considered as one of the promising strategies for obtaining high-value products and transforming solar energy to hydrogen. Herein, we report that a Ge/Zr co-doped FeO photoanode present an excellent and stable PEC performance for glycerol oxidation to formate (FA) product. The Ge and Zr co-doping synergistically reduce charge carrier recombination and enhance charge transfer kinetics of the photoanode, promoting the selectivity and Faradaic efficiency toward FA chemical.

Single Ag Atoms Induce Ag-N/O Bonds on WO for Ultrastable Acid Ammonia Synthesis.

Ammonia from nitrate-containing wastewater demands the catalysts with high activity, stability, and selectivity toward acidic electrochemical nitrate reduction owing to the corrosion effect of the catalyst and the competitive hydrogen evolution reaction (HER). Herein, we synthesized single Ag atoms induced Ag-N/O bonds on one-dimensional WO nanowires for highly efficient and stable electrochemical nitrate reduction to ammonia under acidic conditions. The resultant catalyst achieved a Faradaic efficiency (FE) of ammonia exceeding ∼90% over a potential range of -0.

Direct ammonia and dihydroxyacetone production in an unbiased photoelectrochemical cell.

Photoelectrochemical production of ammonia usually suffers from a low solar-to-ammonia efficiency and a high overpotential, which influences the bias-free operation of sustainable photoelectrochemistry. Herein, we realize solar-driven ammonia production from waste nitrate by constructing copper-osmium catalysts deposited on the Sb(S,Se) semiconductor, enabling optimized photo-carrier transport pathways and a beneficial co-adsorption configuration of *NO-HO moieties. The photocathode reaches a photocurrent density of 5.

Re and Ru Co-Doped Transition Metal Alloy as a Bifunctional Catalyst for Electrooxidation of Glycerol to Formate Coupled with H Production.

Glycerol electrooxidation (GOR), as an innovative strategy for the production of value-added chemicals, is considered a promising anodic alternative to oxygen evolution reaction in electrocatalysis. However, the high potential and the limited selectivity and faradaic efficiency impede the industrial-scale application toward GOR. Herein, we for the first time constructed rhenium and ruthenium co-doped transition metal alloy (NiCoFeRuRe) for the efficient electrooxidation of glycerol to formate.

Bias-Free Solar-Driven Ammonia Coupled to C-Dihydroxyacetone Production through Photoelectrochemistry.

Conversion of solar energy into value-added chemicals through photoelectrochemistry (PEC) holds great potential for advancing sustainable development but limits by high onset potential which affects energy conversion efficiencies. Herein, we utilized a CuPd cocatalyst-modified Sb(S,Se) photocathode (CuPd/TSSS) to achieve an ultra-low onset potential of 0.83 V for photoelectrochemical ammonia synthesis.

Electrochemical Nitrate Reduction to Ammonia on AuCu Single-Atom Alloy Aerogels under Wide Potential Window.

Electrocatalytic nitrate reduction to ammonia (NORR) is very attractive for nitrate removal and ammonia production in industrial processes. However, the nitrate reduction reaction is characterized by intense hydrogen competition at strong reduction potentials, which greatly limits the Faraday efficiency at strong reduction potentials. Herein, we reported an AuCu single-atom alloy aerogels (AuCu SAAs) with three-dimensional network structure with significant nitrate reduction performance of Faraday efficiency (FE) higher than 90 % over a wide potential range (0 ~ -1 V ).

Controlled Defective Engineering on CuIr Catalyst Promotes Nitrate Selective Reduction to Ammonia.

Electrochemical nitrate reduction reaction (NORR) is a promising low-carbon and environmentally friendly approach for the production of ammonia (NH). Herein, we develop a high-temperature quenched copper (Cu) catalyst with the aim of inducing nonequilibrium phase transformation, revealing the multiple defects (distortion, dislocations, vacancies, etc.) presented in Cu, which lead to low overpotential for NORR and high efficiency for NH production.

Unbiased Photoelectrochemical HO Coupled to H Production via Dual SbS-Based Photoelectrodes with Ultralow Onset Potential.

The productions of hydrogen peroxide (HO) and hydrogen (H) in a photoelectrochemical (PEC) water splitting cell suffer from an onset potential that limits solar conversion efficiencies. Moreover, the formation of HO through two-electron PEC water oxidation reaction competes with four-electron oxidation evolution reaction. Herein, we developed the surface selenium doped antimony trisulfide photoelectrode with the integrated ruthenium cocatalyst (Ru/Sb(S,Se)) to achieve the low onset potential and high Faraday efficiency (FE) for selective HO production.

Enhanced Charge-Carrier Dynamics and Efficient Photoelectrochemical Nitrate-to-Ammonia Conversion on Antimony Sulfide-Based Photocathodes.

The photoelectrochemical reduction of nitrate to ammonia (PEC NORR) has emerged as a promising pathway for facilitating the natural nitrogen cycle. The PEC NORR can lower the reduction potential needed for ammonia synthesis through photogenerated voltage, showcasing the significant potential for merging abundant solar energy with sustainable nitrogen fixation. However, it is influenced by the selective photocathodes with poor carrier kinetics, low catalytic selectivity, and ammonia yields.

Improving NiFe Electrocatalysts through Fluorination-Driven Rearrangements for Neutral Water Electrolysis.

Neutral electrolysis to produce hydrogen is prime challenging owing to the sluggish kinetics of water dissociation for the electrochemical reduction of water to molecular hydrogen. An ion-enriched electrode/electrolyte interface for electrocatalytic reactions can efficiently obtain a stable electrolysis system. Herein, we found that interfacial accumulated fluoride ions and the anchored Pt single atoms/nanoparticles in catalysts can improve hydrogen evolution reaction (HER) activity of NiFe-based hydroxide catalysts, prolonging the operating stability at high current density in neutral conditions.

Enhanced Charge Carrier Dynamics on Sb Se Photocathodes for Efficient Photoelectrochemical Nitrate Reduction to Ammonia.

Ammonia (NH ) is recognized as a transportable carrier for renewable energy fuels. Photoelectrochemical nitrate reduction reaction (PEC NO RR) offers a sustainable solution for nitrate-rich wastewater treatment by directly converting solar energy to ammonia. In this study, we demonstrate the highly selective PEC ammonia production from NO RR by constructing a CoCu/TiO /Sb Se photocathode.

Superhydrophilic CoFe Dispersion of Hydrogel Electrocatalysts for Quasi-Solid-State Photoelectrochemical Water Splitting.

Photoelectrochemical (PEC) water splitting is an attractive strategy to convert solar energy to hydrogen. However, the lifetime of PEC devices is restricted by the photocorrosion of semiconductors and the instability of co-catalysts. Herein, we report a feasible inherent cross-linking method for stabilizing semiconductors that uses a CoFe-dispersed polyacrylamide (PAM) hydrogel as a transparent protector.

Single-Atom Pt Embedded in Defective Layered Double Hydroxide for Efficient and Durable Hydrogen Evolution.

Electrocatalysis in neutral conditions is appealing for hydrogen production by utilizing abundant wastewater or seawater resources. Single-atom catalysts (SACs) immobilized on supports are considered one of the most promising strategies for electrocatalysis research. While they have principally exhibited breakthrough activity and selectivity for the hydrogen evolution reaction (HER) electrocatalysis in alkaline or acidic conditions, few SACs were reported for HER in neutral media.

Ru-P pair sites boost charge transport in hematite photoanodes for exceeding 1% efficient solar water splitting.

Fast transport of charge carriers in semiconductor photoelectrodes are a major determinant of the solar-to-hydrogen efficiency for photoelectrochemical (PEC) water slitting. While doping metal ions as single atoms/clusters in photoelectrodes has been popularly used to regulate their charge transport, PEC performances are often low due to the limited charge mobility and severe charge recombination. Here, we disperse Ru and P diatomic sites onto hematite (DASs Ru-P:FeO) to construct an efficient photoelectrode inspired by the concept of correlated single-atom engineering.

Single-atomic-site platinum steers photogenerated charge carrier lifetime of hematite nanoflakes for photoelectrochemical water splitting.

Although much effort has been devoted to improving photoelectrochemical water splitting of hematite (α-FeO) due to its high theoretical solar-to-hydrogen conversion efficiency of 15.5%, the low applied bias photon-to-current efficiency remains a huge challenge for practical applications. Herein, we introduce single platinum atom sites coordination with oxygen atom (Pt-O/Pt-O-Fe) sites into single crystalline α-FeO nanoflakes photoanodes (SAs Pt:FeO-Ov).

Ultrafast Deposition of NiFe Metal-organic Framework Catalysts Boosts BiVO Photoanode for Efficient Solar Water Splitting.

The severe photocorrosion of BiVO limits its application in solar energy conversion in the long-term photoelectrochemical stability test. Herein, we synthesized a Fe@Ni-MOFs/BiVO photoanode by a simple ultrasonic method and ultrafast deposition, which avoids the problems of damaging the surface structure of photoelectrode. The Fe@Ni-MOFs/BiVO shows a photocurrent density of 4.

Dynamic semiconductor-electrolyte interface for sustainable solar water splitting over 600 hours under neutral conditions.

Photoelectrochemical (PEC) water splitting that functions in pH-neutral electrolyte attracts increasing attention to energy demand sustainability. Here, we propose a strategy to in situ form a NiB layer by tuning the composition of the neutral electrolyte with the additions of nickel and borate species, which improves the PEC performance of the BiVO photoanode. The NiB/BiVO exhibits a photocurrent density of 6.

Photo-driven Oxygen Vacancies Extends Charge Carrier Lifetime for Efficient Solar Water Splitting.

A photocharge/discharge strategy is proposed to initiate the WO photoelectrode and suppress the main charge recombination, which remarkably improves the photoelectrochemical (PEC) performance. The photocharged WO surrounded by a 8-10 nm overlayer and oxygen vacancies could be operated more than 25 cycles with 50 h durability without significant decay on PEC activity. A photocharged WO /CuO photoanode exhibits an outstanding photocurrent of 3.

Stable Cocatalyst-Free BiVO Photoanodes with Passivated Surface States for Photocorrosion Inhibition.

Improving charge transport and reducing bulk/surface recombination can increase the activity and stability of BiVO for water oxidation. Herein we demonstrate that the photoelectrochemical (PEC) performance of BiVO can be significantly improved by potentiostatic photopolarization. The resulting cocatalyst-free BiVO photoanode exhibited a record-high photocurrent of 4.

Towards Long-Term Photostability of Nickel Hydroxide/BiVO Photoanodes for Oxygen Evolution Catalysts via In Situ Catalyst Tuning.

Increasing long-term photostability of BiVO photoelectrode is an important issue for solar water splitting. The NiOOH oxygen evolution catalyst (OEC) has fast water oxidation kinetics compared to the FeOOH OEC. However, it generally shows a lower photoresponse and poor stability because of the more substantial interface recombination at the NiOOH/BiVO junction.

Synthesis and antiproliferative activity of 4-substituted-piperazine-1-carbodithioate derivatives of 2,4-diaminoquinazoline.

A novel series of 4-substituted-piperazine-1-carbodithioate derivatives of 2,4-diaminoquinazoline were synthesized and tested for their antiproliferative activities against five human cancer cell lines including A549 (lung cancer), MCF-7 (breast adenocarcinoma), HeLa (cervical carcinoma), HT29 and HCT-116 (colorectal cancer). Most of the synthesized compounds showed broad spectrum antiproliferative activity (IC50 1.47-11.