Chemical Science, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 1, 2024
Employing water as a hydrogen source is an attractive and sustainable option in electricity-driven organic hydrogenation, which can overcome the drawbacks associated with traditional sources like H 2 .
Language: Английский
Advanced Materials, Journal Year: 2024, Volume and Issue: 36(27)
Published: April 19, 2024
Abstract Spinel oxides with tunable chemical compositions have emerged as versatile electrocatalysts, however their performance is greatly limited by small surface area and low electron conductivity. Here, ultrathin high‐entropy Fe‐based spinel nanosheets are rationally designed (i.e., (Co 0.2 Ni Zn Mg Cu )Fe 2 O 4 ; denotes A 5 Fe ) in thickness of ≈4.3 nm large highly exposed active sites via a modified sol–gel method. Theoretic experimental results confirm that the bandgap significantly smaller than ordinary oxides, realizing transformation binary oxide from semiconductors to metalloids. As result, such manifest excellent for nitrate reduction reaction (NO 3 − RR) ammonia (NH ), NH yield rate ≈2.1 mmol h −1 cm −2 at −0.5 V versus Reversible hydrogen electrode, outperforming other spinel‐based electrocatalysts. Systematic mechanism investigations reveal NO RR mainly occurred on sites, introducing tetrahedral regulates adsorption strength N O‐related intermediates boosting RR. The above findings offer platform regulate enhance electrocatalytic oxides.
Language: Английский
Citations
30
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 29, 2024
Abstract Ethylene (C 2 H 4 ) electrosynthesis from the electrocatalytic CO reduction process holds enormous potential applications in industrial production. However, sluggish kinetics of C─C coupling often result low yield and poor selectivity for C Herein, performance Cu catalysts varying sizes is investigated, prepared via a cryo‐mediated liquid phase exfoliation technique, electrochemical to . The activity gradually increase as size decreases tens nanometers few nanometers. Impressively, 5 nm quantum dots (Cu‐5) achieve maximum Faradaic efficiency (FE) 81.5% half‐cell cathodic energy (CEE) 42.2% with large partial current density 1.1 A cm −2 at −0.93 V versus reversible hydrogen electrode. Structural characterization situ spectroscopic analysis reveal that Cu‐5 dots, dominated by (100) facet, provide an abundance active sites enhance adsorption activation, promoting formation *CO intermediates. accumulation intermediates on facilitates CO‐CHO reaction, thus enhancing production rate.
Language: Английский
Citations
15
Materials Today Chemistry, Journal Year: 2024, Volume and Issue: 37, P. 102035 - 102035
Published: March 29, 2024
Language: Английский
Citations
12
Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(18), P. 6435 - 6481
Published: Jan. 1, 2024
Active sites play a pivotal role in photo/electrocatalysis, particularly the transition from fossil fuels to clean, efficient and renewable energy sources.
Language: Английский
Citations
12
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown
Published: Aug. 23, 2024
Regulating competitive reaction pathways to direct the selectivity of electrochemical CO
Language: Английский
Citations
11
Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)
Published: July 17, 2024
Abstract Electrocatalytic alkynes semi-hydrogenation to produce alkenes with high yield and Faradaic efficiency remains technically challenging because of kinetically favorable hydrogen evolution reaction over-hydrogenation. Here, we propose a hierarchically nanoporous Cu 50 Au alloy improve electrocatalytic performance toward alkynes. Using Operando X-ray absorption spectroscopy density functional theory calculations, find that modulate the electronic structure Cu, which could intrinsically inhibit combination H* form H 2 weaken alkene adsorption, thus promoting alkyne hampering Finite element method simulations experimental results unveil catalysts induce local microenvironment abundant K + cations by enhancing electric field within nanopore, accelerating water electrolysis more H*, thereby conversion As result, electrocatalyst achieves highly efficient 94% conversion, 100% selectivity, 92% over wide potential window. This work provides general guidance rational design for high-performance transfer catalysts.
Language: Английский
Citations
10
ChemElectroChem, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 9, 2025
Abstract Electrochemical nitrate reduction (NO 3 − RR) is being recognized as a sustainable approach to synthesizing ammonia which essential for the chemical industry and key agricultural input conventionally produced through hard‐to‐abate Haber Bosch process. Among various transition metals, copper‐based electrocatalysts stand out in efficaciously carrying this reaction owing their superior electrocatalytic activity selectivity. In context, here, current state of research advanced scientific understandings employing Copper NO₃ RR are succinctly, but comprehensively, presented while focusing on its design strategies enhance performance. First, NO mechanisms taking place at surface copper described, followed by discussion unique attributes facilitating electrosynthesis. Then, electrocatalyst fabrication routes designing reviewed, emphasizing role evolved structure, morphology, textural properties chemistries improving kinetics. Nanostructuring, facet defect engineering, support, doping, alloying, heterojunction single active catalysts (SACs) centers parameters enhanced behavior highlighted.
Language: Английский
Citations
1
Advanced Materials, Journal Year: 2024, Volume and Issue: unknown
Published: July 31, 2024
Abstract Catalysis is crucial for clean energy, green chemistry, and environmental remediation, but traditional methods rely on expensive scarce precious metals. This review addresses this challenge by highlighting the promise of earth‐abundant catalysts recent advancements in their rational design. Innovative strategies such as physics‐inspired descriptors, high‐throughput computational techniques, artificial intelligence (AI)‐assisted design with machine learning (ML) are explored, moving beyond time‐consuming trial‐and‐error approaches. Additionally, biomimicry, inspired efficient enzymes nature, offers valuable insights. systematically analyses these strategies, providing a roadmap developing high‐performance from abundant elements. Clean energy applications (water splitting, fuel cells, batteries) chemistry (ammonia synthesis, CO 2 reduction) targeted while delving into fundamental principles, biomimetic approaches, current challenges field. The way to more sustainable future paved overcoming catalyst scarcity through
Language: Английский
Citations
5
Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 990, P. 174471 - 174471
Published: April 9, 2024
Language: Английский
Citations
4
Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)
Published: July 13, 2024
Abstract Electrocatalytic semihydrogenation of acetylene (C 2 H ) provides a facile and petroleum-independent strategy for ethylene 4 production. However, the reliance on preseparation concentration raw coal-derived C hinders its economic potential. Here, concave surface is predicted to be beneficial enriching optimizing mass transfer kinetics, thus leading high partial pressure around active sites direct conversion . Then, porous carbon-supported Cu nanoparticle (Cu-PCC) electrode designed enrich gas sites. As result, as-prepared enables 91.7% Faradaic efficiency 56.31% single-pass under simulated atmosphere (~15%) at current density 0.42 A cm −2 , greatly outperforming counterpart without supports. The strengthened intermolecular π conjugation caused by increased coverage revealed result in delocalization electrons consequently promoting activation, suppressing hydrogen evolution competition enhancing selectivity.
Language: Английский
Citations
4