One-Step Strategy to Maximize Single-Atom Catalyst Utilization in Nitrate Reduction via Bidirectional Optimization of Mass Transfer and Electron Supply DOI
Xianhu Long, Fan Huang, Tao P. Zhong

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

Single-atom catalysts offer exceptional performance but face practical challenges due to complex synthesis and low efficiency caused by mass transfer resistance. In this study, based on a simple one-step pyrolysis method, we designed Cu single-atom catalyst with high active site exposure locally electron-deficient environment (HE Cu1-N4) achieve maximum utilization in electrocatalytic nitrate reduction (NO3RR). Using advanced characterization techniques, confirmed that its unique 3D structure enhances atom reduces (NO3-) Synchrotron radiation DFT calculations showed adjusting the coordination induces local effect atoms, increasing electrostatic attraction NO3-. HE Cu1-N4 achieved 100% NH3 selectivity across wide range of NO3- concentrations, an yield (5.09 mg h-1 mgcat-1) nearly 7-fold higher than conventional unmodified (Cu1-N2, 0.73 mgcat-1). Under pilot-scale conditions, demonstrated strong resistance interference excellent stability water systems. A modification method enhanced single atoms catalysts, significantly improving catalytic activity material. Moreover, straightforward strategy holds promise for large-scale production paving way engineering applications.

Language: Английский

Modulating electronic structure of CoS2 nanorods by Fe doping for efficient electrocatalytic overall water splitting DOI
Qiang Shi, Zhiyong Li, Siqi He

et al.

Nano Energy, Journal Year: 2024, Volume and Issue: unknown, P. 110564 - 110564

Published: Dec. 1, 2024

Language: Английский

Citations

27
Single‐Atom Nickel Encapsulated in Nanosheet‐Coiled rGO‐CTAB‐MoS2 Nanoflowers for High‐Efficiency and Long‐Term Hydrogen Evolution in Acidic Medium DOI Open Access

Hanhua Liu,

Qianqian Liu, Yangfan Shao

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 24, 2025

Abstract Molybdenum disulfide (MoS 2 ) is a promising, cost‐effective alternative to noble metal catalysts for electrocatalytic hydrogen evolution reactions (HER). However, its poor conductivity and limited active sites hinder application. In this study, single‐atom nickel (Ni SA) encapsulated in nanosheet‐coiled rGO‐cetyltrimethyl ammonium bromide (CTAB)‐MoS nanoflowers designed synthesized using hydrothermal photodeposition methods. The resulting Ni SA/rGO‐CTAB‐MoS exhibited outstanding HER performance, with an overpotential of 79 mV Tafel slope 33.28 dec −1 at current density 10 mA cm −2 0.5 m H SO 4 . Notably, it demonstrates exceptional durability, maintaining performance over 300 h −0.828 V versus RHE. A milligram the catalyst produced 1209.4 L under highly acidic conditions ambient temperature pressure, making viable commercial Pt/C catalysts. Experimental theoretical investigations reveal that interplay between SA surrounding rGO‐CTAB‐MoS significantly enhances availability, intrinsic conductivity, structural stability, favorable adsorption behavior atoms, thereby leading performance. This work presents promising approach develop durable MoS ‐based excellent activity.

Language: Английский

Citations

0
Atomic‐Level Engineering of Transition Metal Dichalcogenides for Enhanced Hydrogen Evolution Reaction DOI
Lu Zhao, Yang Song,

Zijun Xie

et al.

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: April 16, 2025

Abstract 2D transition metal dichalcogenides (2D‐TMDs) have attracted considerable attention due to their characteristic layered structures, which provide abundant accessible surface sites. Significant research efforts are dedicated designing nanostructures and regulating electron properties enhance the catalytic performance of hydrogen evolution reaction (HER) TMDs. However, elucidating HER mechanism, particularly role active sites, remains challenging owing complex electronic structures introduced by nanoscale modification. Recent advances focused on achieving efficient catalysis through atomic‐level control TMD precise identification coordination environment Atomic‐level engineering TMDs, including incorporating or removing specific atoms onto basal surfaces within interlayer via advanced synthetic approaches, has emerged as a promising strategy. These modifications optimize adsorption/desorption energy H, increase density create synergetic sites arranging in controlled configuration, single‐atomic modified TMDs (SA‐TMDs) catalysts. Further, insights notable SA‐TMDs discussed detail when compared both pure conventionally doped counterparts. This review aims advance understanding provides basis for developing next‐generation materials applications.

Language: Английский

Citations

0
One-Step Strategy to Maximize Single-Atom Catalyst Utilization in Nitrate Reduction via Bidirectional Optimization of Mass Transfer and Electron Supply DOI
Xianhu Long, Fan Huang, Tao P. Zhong

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

Single-atom catalysts offer exceptional performance but face practical challenges due to complex synthesis and low efficiency caused by mass transfer resistance. In this study, based on a simple one-step pyrolysis method, we designed Cu single-atom catalyst with high active site exposure locally electron-deficient environment (HE Cu1-N4) achieve maximum utilization in electrocatalytic nitrate reduction (NO3RR). Using advanced characterization techniques, confirmed that its unique 3D structure enhances atom reduces (NO3-) Synchrotron radiation DFT calculations showed adjusting the coordination induces local effect atoms, increasing electrostatic attraction NO3-. HE Cu1-N4 achieved 100% NH3 selectivity across wide range of NO3- concentrations, an yield (5.09 mg h-1 mgcat-1) nearly 7-fold higher than conventional unmodified (Cu1-N2, 0.73 mgcat-1). Under pilot-scale conditions, demonstrated strong resistance interference excellent stability water systems. A modification method enhanced single atoms catalysts, significantly improving catalytic activity material. Moreover, straightforward strategy holds promise for large-scale production paving way engineering applications.

Language: Английский

Citations

0