Access to nitrogen-based fertilizers is critical maximize agricultural yield, as nitrogen the most common rate-limiting nutrient. Nearly all rely on ammonia and nitric acid feedstocks, thus demand for these chemicals heavily dependent global population food demand. Over next three decades, will continue dictate market size value acid, which consequently have a significant impact our energy infrastructure. Here, we discuss potential carbon-free electrocatalytic reduction, oxidation, nitrate...

The design of electrocatalysts capable selectively reducing nitrate to ammonia is gaining interest as a means transforming waste into fertilizers. However, most prior investigations prototypical electrocatalysts, such polycrystalline Pd and Pt, have focused on unraveling the mechanisms responsible for selective reduction nitrogen gas. Such noble metals demonstrate notoriously low activity (nitrate nitrite) high nitrite (nitrite nitrogen). Here, we aim elucidate effect surface structure has...

Sodium-metal batteries (SMBs) are considered as a compliment to lithium-metal for next-generation high-energy because of their low cost and the abundance sodium (Na). Herein, 3D nanostructured porous carbon particle containing carbon-shell-coated Fe nanoparticles (PC-CFe) is employed highly reversible Na-metal host. PC-CFe has unique hierarchy based on sub-micrometer-sized particles, ordered open channels, evenly distributed carbon-coated (CFe) surface. achieves high reversibility Na...

A structure-mechanism-performance relationship of metal-free carbon catalysts for outstanding H 2 O production activity and selectivity in alkaline media.

Bimetallic PtNi nanoparticles have been considered as a promising electrocatalyst for oxygen reduction reaction (ORR) in polymer electrolyte membrane fuel cells (PEMFCs) owing to their high catalytic activity. However, under typical cell operating conditions, Ni atoms easily dissolve into the electrolyte, resulting degradation of catalyst and membrane-electrode assembly (MEA). Here, we report gallium-doped octahedral on carbon support (Ga–PtNi/C). The Ga–PtNi/C shows ORR activity, marking an...

Recently, Pt3M (M = Fe, Ni, Co, Cu, etc.) intermetallic compounds have been highlighted as promising candidates for oxygen reduction reaction (ORR) catalysts. In general, to form those compounds, alloy phase nanoparticles are synthesized and then heat-treated at a high temperature. However, easily agglomerate during the heat treatment, resulting in decrease electrochemical surface area (ECSA). this study, we Pt–Fe employed carbon coating protect from agglomeration treatment. As result, Pt3Fe...

Electrocatalytic conversion of nitrate in waste can enable efficient remediation (NO3– to N2) or valorization NH4+) depending on the selectivity catalyst. Palladium and copper electrocatalysts typically exhibit ideal nitrite binding properties, allowing for effective destruction nitrate. However, rational steering through material design remains a critical challenge PdCu electrocatalyst. Here, we use electrochemical underpotential deposition method synthesize palladium nanocube...

Electrochemical nitrate reduction (NO3 RR) has attracted attention as an emerging approach to mitigate pollution in groundwater. Here, we report that a highly ordered PdCu alloy-based electrocatalyst exhibits selective (91% N2), stable (480 h), and near complete (94%) removal of without loss catalyst. In situ ex XAS provide evidence structural ordering between Pd Cu improves long-term catalyst stability during NO3RR. contrast, also disordered non-selective (44% N2 49% NH4+), unstable,...

Advanced bipolar membranes (BPMs) with low water-dissociation overpotential (ηwd) may enable new electrochemical technologies for electrolysis, fuel cells, acid–base synthesis, brine remediation, lithium-battery recycling, and cement production. However, these advanced BPMs have only been demonstrated in BPM water electrolysis (BPMWE) configurations where the is under static compression by porous-transport layers. It important to study applications like electrodialysis large degrees of are...

Abstract The energy and power performance of lithium (Li)‐ion batteries is significantly reduced at low‐temperature conditions, which mainly due to the slow diffusion Li‐ions in graphite anode. Here, it demonstrated that effective utilization surface‐controlled charge storage mechanism through transition from layered 3D crumpled graphene (CG) dramatically improves Li‐ion kinetics structural stability conditions. structure‐controlled CG anode prepared via a one‐step aerosol drying process...

A Pt 3 Mn intermetallic ORR electrocatalyst was synthesized using a facile synthesis without additional multi-steps, and exhibits superior single-cell performance durability.

Ion-selective membranes are necessary components of many electrochemical systems including fuel cells, electrolyzers, redox flow batteries, and electrodialyzers. Perfluorinated sulfonated (PFSMs) dominate these applications due to their excellent combination fast ion transport, stability, processability. However, perfluorinated cation exchange (CEMs) expensive, production process involves chemistry that generates toxic chemicals. The development affordable, nonfluorinated with a competitive...

The electrochemical reduction of nitrate (NO3RR) to ammonia (NH3) provides a decentralized and environmentally friendly route for sustainable production while addressing the urgent issue pollution in water bodies. Recent advancements NO3RR research have improved catalyst design, mechanistic understanding, electrolyzer technology, enhancing selectivity, yield, energy efficiency. This review explores cutting-edge developments, focusing innovative designs such as membrane electrode assemblies...

The electrochemical reduction from nitrate (NO3RR) to ammonia (NH3) provides a decentralized and environmentally friendly route for sustainable production while addressing the urgent issue of pollution in water bodies. Recent advancements NO3RR research have improved catalyst designs, mechanistic understanding, electrolyzer technologies, enhancing selectivity, yield, energy efficiency. This review explores cutting-edge developments, focusing on innovative designs catalysts electrolyzers,...

Abstract The significant performance decay in conventional graphite anodes under low‐temperature conditions is attributed to the slow diffusion of alkali metal ions, requiring new strategies enhance charge storage kinetics at low temperatures. Here, nitrogen (N)‐doped defective crumpled graphene (NCG) employed as a promising anode enable stable operation metal‐ion by exploiting surface‐controlled mechanisms. At temperature −40 °C, NCG maintain high capacities ≈172 mAh g −1 for lithium...

Electrolyte engineering is crucial for advancing lithium (Li) metal batteries (LMBs). Currently, unstable electrode-electrolyte interfaces limit the stable cycling of LMBs. Here, we introduce an additive approach aimed at...

Intermediate temperature electrosynthesis may allow for large-scale renewable ammonia production.

PtNi octahedral nanoparticles are considered as one of the best-performing catalysts for oxygen reduction reaction (ORR). However, Ni dissolution deteriorates their catalytic activity and stability during ORR. Here, we report a strategy that improves ORR nanoparticle catalyst through incorporation novel dopant. Computational screening with seven different elements (Bi, In, Ru, Sn, Te, Zn, Zr) suggests In most promising candidate based on metal doping energy OH* adsorption energy....

Organic materials with redox-active oxygen functional groups are of great interest as electrode for alkali-ion storage due to their earth-abundant constituents, structural tunability, and enhanced energy properties. Herein, a hybrid carbon framework consisting reduced graphene oxide functionalized quantum dots (CQDs) is developed via the one-pot solvothermal reduction method, systematic study undertaken investigate its redox mechanism electrochemical properties Li-, Na-, K-ions. Due...

Developing active and stable electrocatalysts for the oxygen evolution reaction (OER) is essential to enhance efficiency of water splitting. Herein, we report a nickel/tungsten carbide (Ni/WC) composite catalyst in which WC nanoparticles are embedded underneath thin Ni layers as highly OER an alkaline electrolyte. The layer has modulated electronic structure stemming from interaction with WC. Ni/WC exhibits excellent activity durability 1 M KOH solution. turnover frequency (0.58 s–1)...

Cost reduction and long-term durability are crucial issues for the commercialization of polymer electrolyte membrane fuel cells. To accomplish these goals, herein, we report an electrospun iron nitrogen codoped mesoporous carbon nanofiber (Fe-N-MCNF) use as both a low-cost nonprecious metal catalyst durable support platinum nanoparticles. Silica nanoparticles polyvinyl acetate used together porogens to create mesopores. As synergetic effect two types porogens, numerous mesopores successfully...

The chemical coupling of molybdenum carbide (Mo 2 C) to cobalt (Co) promotes oxygen evolution reaction (OER) kinetics on the Co surface by making more electrophilic. Here, gain a deeper understanding effects electrophilic properties OER and obtain high activity, Fe Ni are additionally incorporated into nanoparticles that coupled with Mo C (Co‐Mo C). Considering oxidation states (Fe 3+ ), (Co 2+ /Co (Ni ) ions, expected affect electronic structure in opposite direction. Lewis acidic doping...

We tested an emerging hypothesis that carbon species may play integral role in catalyzing dinitrogen adsorption and reduction to ammonia.