Tunable Surface Charge Redistribution via Lattice Strain Engineering in B/Mo Co‐Doped NiV2O6 for High‐Power Supercapacitors DOI
Yanfei Pang, Lili Wu, Jianjun Liu

et al.

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

Published: May 12, 2025

Abstract The pursuit of high‐energy‐density supercapacitors remains challenged by the irreversible surface charge accumulation and sluggish ion dynamics in conventional vanadate cathodes. To address these limitations, a lattice strain engineering strategy is devised through B/Mo co‐doping NiV 2 O 6 , which enables dynamic regulation distribution via atomic‐level stress manipulation. Density functional theory (DFT) calculations demonstrate that high‐valence Mo 6+ induces compressive (–4.4%) to strengthen metal‐oxygen covalency, while low‐electronegativity B 3+ generates tensile (+ 2.9%) enhances hydroxyl affinity. This dichotomy optimizes OH − adsorption energetics 0.28 eV creates gradient oxygen vacancy. cooperative dopant effects significantly enhance charge‐transfer kinetics, endowing B/Mo‐NiV /NF electrode with superior specific capacitance 2850 F g −1 (1 140 C ) at 1 A . In situ Raman reveals reversible vacancy migration along (004) crystallographic planes during cycling, dynamically dissipates structural stress. solid‐state asymmetric supercapacitor delivers 1.8 V operational window remarkable energy/power density (38.35 Wh kg /900 W 75% capacity retention after 10 000 cycles. Practical viability demonstrated powering 20 parallel‐connected light‐emitting diodes (LEDs). work pioneers strain‐mediated paradigm for durable high‐power energy storage.

Language: Английский

Palladium Married with MBene Multilayers: Enabling Intensified Hydrogen Spillover for Efficient Nitrite‐to‐Ammonia Electroreduction DOI
Jiayi Zhang, Qiaoshi Zeng, Xinzhi Wang

et al.

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
A-Site Deficiency-Mediated Creation of Oxygen Vacancies in LaMnO3-δ Nanofibers for Efficient Nitrate Reduction DOI

Yaxin Lv,

Jing Ren, Min Jiang

et al.

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 8094 - 8102

Published: May 1, 2025

Language: Английский

Citations

0
Electronic structure modulation of lanthanum-doped Cu2O supported by GO to accelerate C–C coupling for electrocatalytic CO2 reduction towards multicarbon products DOI
Teng Zhou,

Baorong Xu,

Ranran Niu

et al.

Chemical Engineering Science, Journal Year: 2025, Volume and Issue: 313, P. 121744 - 121744

Published: April 29, 2025

Language: Английский

Citations

0
Tunable Surface Charge Redistribution via Lattice Strain Engineering in B/Mo Co‐Doped NiV2O6 for High‐Power Supercapacitors DOI
Yanfei Pang, Lili Wu, Jianjun Liu

et al.

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

Published: May 12, 2025

Abstract The pursuit of high‐energy‐density supercapacitors remains challenged by the irreversible surface charge accumulation and sluggish ion dynamics in conventional vanadate cathodes. To address these limitations, a lattice strain engineering strategy is devised through B/Mo co‐doping NiV 2 O 6 , which enables dynamic regulation distribution via atomic‐level stress manipulation. Density functional theory (DFT) calculations demonstrate that high‐valence Mo 6+ induces compressive (–4.4%) to strengthen metal‐oxygen covalency, while low‐electronegativity B 3+ generates tensile (+ 2.9%) enhances hydroxyl affinity. This dichotomy optimizes OH − adsorption energetics 0.28 eV creates gradient oxygen vacancy. cooperative dopant effects significantly enhance charge‐transfer kinetics, endowing B/Mo‐NiV /NF electrode with superior specific capacitance 2850 F g −1 (1 140 C ) at 1 A . In situ Raman reveals reversible vacancy migration along (004) crystallographic planes during cycling, dynamically dissipates structural stress. solid‐state asymmetric supercapacitor delivers 1.8 V operational window remarkable energy/power density (38.35 Wh kg /900 W 75% capacity retention after 10 000 cycles. Practical viability demonstrated powering 20 parallel‐connected light‐emitting diodes (LEDs). work pioneers strain‐mediated paradigm for durable high‐power energy storage.

Language: Английский

Citations

0