Recent Progress and Future Outlook on Catalysts for Ammonia Electrosynthesis: Materials, Structural Design, and Reaction Efficiency

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

With the increasing demand for downstream ammonia products, research on fuel has received growing attention. Therefore, under "dual carbon" context, it is crucial to develop an energy-efficient and environmentally friendly method synthesis. Current indicates that electrocatalytic synthesis one of most promising methods. This study systematically summarizes three major factors influencing nitrogen reduction reaction (eNRR) catalysts synthesis: material optimization, structural design, engineering. In terms materials, precious-metal-based, non-precious-metal-based, metal-free eNRR are classified listed. By examination properties catalytic effects various metals non-metals in synthesis, materials with highest activity can be further identified. To enhance efficiency, strategies, such as vacancy creation, doping, interface engineering, facet changes size morphology active sites, have been summarized. integration reactions, including microscale activation, proton transfer, electron efficiency was discussed depth. Finally, urgent issues need addressed current were discussed, unique insights future development provided. review aims provide innovative ideas design improve rate selectivity catalysts.

Language: Английский

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Nonmetallic High‐Entropy‐Engineered Nanocarbons for Advanced ORR Electrocatalysis

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

High-entropy materials are poised to revolutionize science and industrial applications due their design flexibility, peculiar performance, broad applicability. In this study, we present a proof-of-concept high-entropy engineered nanocarbon (HENC) co-doped with five nonmetal elements (B, F, P, S, N), synthesized via in situ polymerization modification of ZIF-8 followed by pyrolysis. The HENC exhibits outstanding performance as electrocatalyst for the oxygen reduction reaction (ORR), activity on par benchmark Pt/C electrocatalysts superior cyclic stability. Simulations all-site calculations reveal that synergistic effects abundant heteroatoms increased system entropy facilitate formation *O2 species, N, S acting key active elements, while co-doping B F further enhances Notably, HENCs have been validated cathode catalysts zinc-air batteries, achieving an impressive peak power density 604 mW cm-2 demonstrating long-term stability over 16-day period, outpacing commercial catalyst (542 cm-2). This work not only enriches concept high advances understanding but also opens new avenue development high-performance low-cost catalysts.

Language: Английский

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Nonmetallic High‐Entropy‐Engineered Nanocarbons for Advanced ORR Electrocatalysis

Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

Abstract High‐entropy materials are poised to revolutionize science and industrial applications due their design flexibility, peculiar performance, broad applicability. In this study, we present a proof‐of‐concept high‐entropy engineered nanocarbon (HENC) co‐doped with five nonmetal elements (B, F, P, S, N), synthesized via in situ polymerization modification of ZIF‐8 followed by pyrolysis. The HENC exhibits outstanding performance as electrocatalyst for the oxygen reduction reaction (ORR), activity on par benchmark Pt/C electrocatalysts superior cyclic stability. Simulations all‐site calculations reveal that synergistic effects abundant heteroatoms increased system entropy facilitate formation *O 2 species, N, S acting key active elements, while co‐doping B F further enhances Notably, HENCs have been validated cathode catalysts zinc–air batteries, achieving an impressive peak power density 604 mW cm −2 demonstrating long‐term stability over 16‐day period, outpacing commercial catalyst (542 ). This work not only enriches concept high advances understanding but also opens new avenue development high‐performance low‐cost catalysts.

Language: Английский

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FeCo Alloy Nanoparticles on Porous Carbon for Zinc–Air Batteries

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 10, 2024

Bifunctional catalysts (OER/ORR) require lower overpotentials and fast mass transfer, but developing transition metal-based bifunctional that can satisfy these requirements remains a major challenge. Herein, composite consisting of FeCo alloy nanoparticles uniformly loaded on three-dimensional (3D) hierarchical porous nitrogen-doped carbon (FeCo/HP-NC) is rationally designed. The electronic modulation the provide favorable structure for OER/OER reaction, while facilitate not only accessible channels also transfer electrocatalytic reactions. Thus, FeCo/HP-NC provides modest (E1/2 = 0.83 V, η 0.335 V). In particular, when compared with commercially available noble catalysts, offers higher power density, more stable voltage (1.43 V), stability exceeds 300 h as cathode. As this investigation, strategies increasing catalytic performance oxygen electrocatalysis density energy storage applications could be proposed.

Language: Английский

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Salt template synthesis of CoO@Co nanoparticles encapsulated in 3D porous nitrogen‐doped carbon for oxygen reduction reaction

cMat., Journal Year: 2024, Volume and Issue: 1(3)

Published: Dec. 1, 2024

Abstract Developing high performance and cost‐effective electrocatalysts toward oxygen reduction reaction (ORR) is of critical significance for fuel cells metal–air batteries. Herein, CoO@Co nanoparticles encapsulated in three‐dimensional (3D) porous nitrogen‐doped carbon (CoO@Co/Co‐N‐C) have been successfully derived from the cobalt–tannin framework via NH 4 Cl salt template strategy. Owing to generated 3 HCl gas during pyrolysis process, CoO@Co/Co‐N‐C formed a 3D architecture with ultrahigh‐specific surface area (1052.5 m 2 g −1 ). This hybrid catalyst exhibits comparable ORR catalytic activity, as well superior stability 20 wt% Pt/C alkaline conditions. finding offers novel facile strategy synthesize non‐precious metal energy conversion storage applications.

Language: Английский

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P-block cathode electrocatalysts: A critical review of their role and impact on oxygen reduction reaction in fuel cells applications

Journal of Industrial and Engineering Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

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CoNi-N/P-Doped Carbon Nanotubes as Catalysts for Efficient Oxygen Reduction Reaction

Langmuir, Journal Year: 2024, Volume and Issue: 40(32), P. 17071 - 17080

Published: July 30, 2024

Transition metals (TMs) supported by heteroatom-doped carbon materials are considered to be the potential alternatives Pt/C catalyst owing their low cost, outstanding electrocatalytic efficiency, and excellent electrochemical durability. In this paper, N/P-doped nanotube (CNT) (N/P-CNT)-supported monometallic (Co, Ni) bimetallic (CoNi) catalysts were synthesized one-step pyrolysis using diammonium hydrogen phosphate, 2-methylimidazole organometallic salts as precursors, CNT carrier; effects of transition TM types temperature (Tp) on microstructure properties explored. The analysis exhibited that CoNi was superior both Co Ni catalysts, pyrolyzed at 900 °C a better graphitization degree. optimal CoNi-N/P-CNT-900 displayed remarkable oxygen reduction reaction performance with half-wave (E1/2) 0.86 V methanol tolerance stability. Moreover, Zn-air battery coated demonstrated larger open circuit voltage 1.577 V, peak power density 212.89 mW cm–2 357.8 mA cm–2, well higher specific capacity 799 h gZn–1, (1.492 96.04 216.8 735 gZn–1), showing practical value. This study is expected promote commercialization electrocatalysts.

Language: Английский

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Optimizing Waste Utilization Value: Fabrication of Multi-Functional High-Performance Electrocatalysts via In Situ Chemical Transformation on Chromium-Tanned Collagen Fibers

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: unknown, P. 114886 - 114886

Published: Nov. 1, 2024

Language: Английский

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Enhancing oxygen reduction activity of dinuclear copper complexes loaded on N-doped carbon support via low-temperature pyrolysis strategy

Dalton Transactions, Journal Year: 2024, Volume and Issue: 53(27), P. 11464 - 11469

Published: Jan. 1, 2024

Low-temperature pyrolysis of a dinuclear copper complex loaded on N-doped carbon support produced an atomically dispersed catalyst with dense active sites that exhibited remarkably enhanced performance for oxygen reduction reaction.

Language: Английский

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Micro Direct Methanol Fuel Cells: A Review of Current Technologies and Future Prospects

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Language: Английский

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