Rare Metals, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 30, 2024
Language: Английский
Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)
Published: Nov. 22, 2024
The development of efficient and robust catalysts for hydrogen evolution reaction is crucial advancing the economy. In this study, we demonstrate that ultra-low coordinated hollow PtRuNi-Ox nanocages exhibit superior catalytic activity stability across varied conditions, notably surpassing commercial Pt/C catalysts. Notably, achieve current densities 10 mA cm−2 at only 19.6 ± 0.1, 20.9 21.0 0.1 mV in alkaline freshwater, chemical wastewater, seawater, respectively, while maintaining satisfied with minimal loss after 40,000 cycles. situ experiments theoretical calculations reveal coordination Pt, Ru, Ni atoms creates numerous dangling bonds, which lower water dissociation barrier optimizing adsorption. This research marks a notable advancement precise engineering atomically dispersed multi-metallic centers energy-related applications. Efficient are key to economy, particularly reaction. Here, authors report offer comparable performance both freshwater wastewater conditions.
Language: Английский
Citations
9
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 17, 2025
Abstract The migration of atomic hydrogen species over heterogeneous catalysts is deemed essential for hydrogenation reactions, a process closely related to the catalyst's functionalities. While surface hydroxyls‐assisted spillover well documented on reducible oxide supports, its effect widely‐used nonreducible especially in electrocatalytic reactions with water as source, remains subject debate. Herein, oxide‐anchored copper single‐atom catalyst (Cu 1 /SiO 2 ) designed and uncover that hydroxyls SiO can serve efficient transport channels spillover, thereby enhancing activated coverage favoring reaction. Using dechlorination model reaction, Cu delivers hydrodechlorination activity 42 times greater than commercial Pd/C. An integrated experimental theoretical investigation elucidates facilitate intermediates formed at sites, boosting active . This work demonstrates feasibility acting hydrogen‐species boost supports paves way designing advanced selective electrocatalysts.
Language: Английский
Citations
1
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: April 8, 2025
Abstract Electrochemical nitrite reduction reaction (NO 2 RR) has emerged as a promising alternative approach for ammonia (NH 3 ) production, offering both energy efficiency and environmental sustainability. The rational regulation of active hydrogen (*H) is pivotal NO − ‐to‐NH conversion, yet it remains significant challenge in the context RR. In this study, molybdenum boride (MBene) multilayers are introduced an electronic support to integrate with palladium (Pd) nanoparticles, creating dual catalytic sites that effectively balance adsorption *H *NO , thereby enabling synergistic catalysis Theoretical experimental analyses revealed efficiently generated on Pd subsequently undergoes spillover ‐adsorbed MBene surfaces, facilitating accelerated hydrogenation NH synthesis. Consequently, Pd/MBene catalyst demonstrated exceptional performance, achieving high Faradaic 89%, yield rate 16.9 mg h −1 cat remarkable cycling stability at low applied potential ‐0.3 V versus RHE. Motivated by outstanding RR further utilized cathode construct Zn‐nitrite formaldehyde‐nitrite batteries. These systems functionality simultaneous production electricity generation, highlighting versatile efficient sustainable conversion.
Language: Английский
Citations
1
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: April 14, 2025
Abstract Electrocatalytic nitrate reduction (NO 3 RR) to ammonia (NH ) has great potential address the challenges caused by Habor‐Bosch process. However, sluggish kinetic, complex mechanisms and competitive reactions seriously reduce Faradaic efficiency (FE) yield of NH . Transition metal‐based compounds are promising catalysts for electrocatalytic NO RR, where anions can tune electronic structure metal cation sites. In this work, oxygen (O) phosphorus (P) introduced regulate nickel (Ni) reveal mechanism anion regulation in RR. The electrosynthesis performance is ranked as follows: Ni 2 P surpasses Ni, which turn outperforms NiO. Notably, nanosheets exhibit a maximum FE 97.4% 15.4 mg h − ¹ cm −2 Characterization theoretical calculation indicate that introduction moderately alters resulting reduced energy barriers rate‐limiting step RR improved H O decomposition generate active hydrogen, subsequently enhances production. This work highlights critical role
Language: Английский
Citations
0
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: April 2, 2025
Electrocatalytic tandem nitrate reduction to ammonia (NO3 --to-NH3) offers a promising pathway for energy and environmental sustainability. Although considerable efforts have been presented modulate the reaction pathways enhanced NO3 --to-NH3 electrocatalysis, these advances often require relatively high overpotentials balance yield rate selectivity of NH3, resulting in remarkable inefficiency. Inspired by enzyme catalysis nature, herein enzyme-like electrocatalyst is designed consisting core Cu2O/Cu heterojunction surrounded mesoporous PdCu shell (Cu2O/Cu@mesoPdCu) that accelerated electrocatalysis positive potentials. Impressively, Cu2O/Cu@mesoPdCu nanozymes hold superior performance robust NH3 electrosynthesis fairly potential 0.10 V (versus reversible hydrogen electrode), having Faraday efficiency 96.2%, 13.3 mg h-1 mg-1, half-cell 46.0%. Kinetic studies, situ spectra density functional theory calculations revealed preferentially adsorbed - further reduced *NO2, while active radicals enriched on promoted multistep hydrodeoxygenation *NO2 within "semi-closed" microenvironment, both which synergistically enabled Moreover, this disclosed better more energy-efficient manner when coupling with thermodynamically favorable ethanol oxidation reaction.
Language: Английский
Citations
0
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: July 23, 2024
Abstract The utilization of green hydrogen sources in H 2 O for alkynols electrocatalytic semihydrogenation reaction (ESHR) at ambient temperature provides a promising pathway toward the sustainable conversion alkynols. However, it is still great challenge to construct specific interfacial structure adjust electronic Pd purpose altering strong adsorption with active enhance production alkenols. Here, atomically dispersed GaO x ‐PdMo bimetallene nanoribbons (GaO BNRs) via oxygen bridging Ga atoms designed surface PdMo BNRs 2‐methyl‐3‐butyn‐2‐ol (MBY) ESHR synthesis 2‐methyl‐3‐buten‐2‐ol (MBE). achieve excellent MBE selectivity (≈97.4%), Faraday efficiency (≈96.1%), and maintain long‐term stability. Density functional theory demonstrates that top electron‐enriched bottom electron‐deficient “pyramidal” interface bridge. unique can effectively activate weaken interaction between catalyst MBE, thus promoting generation. Moreover, electron bridge effect Ga‐O‐PdMo induce p‐d orbital hybridization lower d ‐band center modulating reactants adsorption. This work strategy improve performance by modulate distribution.
Language: Английский
Citations
2
Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 21, 2024
Abstract Electrocatalytic nitrate reduction is a crucial process for sustainable ammonia production. However, to maximize yield efficiency, this technology inevitably operates at the potentials more negative than 0 V vs. RHE, leading high energy consumption and competitive hydrogen evolution. To eradicate issue, tungsten bronze (H x WO 3 ) as reversible donor‐acceptor partnered with copper (Cu) enable relay mechanism positive which involves rapid intercalation of H into lattice, prompt de‐intercalation lattice transfer onto Cu, spontaneous H‐mediated nitrate‐to‐ammonia conversion on Cu. The resulting catalysts demonstrated rate 3332.9±34.1 mmol g cat −1 h Faraday efficiency ~100 % 0.10 displaying record‐low estimated 17.6 kWh kg . Using these catalysts, we achieve continuous production in an enlarged flow cell real 17.0
Language: Английский
Citations
2
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 21, 2024
Electrocatalytic nitrate reduction is a crucial process for sustainable ammonia production. However, to maximize yield efficiency, this technology inevitably operates at the potentials more negative than 0 V vs. RHE, leading high energy consumption and competitive hydrogen evolution. To eradicate issue, tungsten bronze (H
Language: Английский
Citations
2
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(34), P. 44817 - 44829
Published: Aug. 19, 2024
Cobalt phosphide has received much attention as an efficient catalyst for electrocatalytic hydrodechlorination (EHDC). However, the active species proton hydrogen (H*) is consumed by evolution reaction (HER). Herein, we report a crystal regulation strategy cobalt phosphate/graphitic nanocarbon/nickel foam (CoPO/GC/NF) catalysts applied EHDC of 2,4-dichlorophenoxyacetic acid (2,4-D). Characterization revealed that during high-temperature phosphatization process, CoPO/GC/NF developed Co(PO
Language: Английский
Citations
0
Rare Metals, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 30, 2024
Language: Английский
Citations
0