Ni3V2O8 Nanospheres for Sustained and Efficient Enhancement of Electrocatalytic H2O2 Production in pH-Universal Solutions DOI
Zhikang Bao, Wenjuan Fang, Jiayuan Li

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(16), P. 12140 - 12151

Published: July 30, 2024

Electrosynthesis of hydrogen peroxide (H2O2) is an energy-efficient and environmentally friendly approach with the potential for on-site generation application but severely constrained by lack efficient stable catalysts to activate two-electron oxygen reduction reaction high selectivity generate H2O2 in yield. Herein, we report a nickel vanadate catalyst (Ni3V2O8-NS) featuring selectivity, activity, stability. The Ni3V2O8-NS exhibited across pH-universal electrolytes (acidic 92.28%, neutral 92.76%, basic 92.36%), giving record yield 44,010 mmol h–1 gcatalyst–1 (neutral) 38,043 (weakly acidic) customized flow cell displayed good stability during 10-cycles test (each cycle lasting 10 h) at concentration (10 wt %). Based on situ spectroscopic density functional theory calculations, effect Ni–V revealed, introduction V changing coordination environment surface Ni providing more suitable adsorption energy intermediate *OOH, resulting its catalytic activity. Furthermore, concept production was demonstrated through oxidative degradation dyes antibiotics. This work has designed metal promising electrocatalytic performance, shedding light practicality H2O2.

Language: Английский

Rational Design of Covalent Organic Frameworks with Redox-Active Catechol Moieties for High-Performance Overall Photosynthesis of Hydrogen Peroxide DOI

Shufan Feng,

Hao Cheng, Feng Chen

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(10), P. 7736 - 7745

Published: May 2, 2024

Covalent organic frameworks (COFs) have emerged as promising candidates for solar-driven photosynthesis of hydrogen peroxide (H2O2), yet the development high-performance COFs tailored practical applications presents substantial challenges. This research introduces integration redox-active catechol moiety into a series (TPE-COF-OH, TPB-COF-OH, and TPP-COF-OH), serving pivotal active site photocatalytic oxygen (O2) reduction to H2O2 through reversible catechol-quinone interconversion mechanism. process facilitates transformation o-benzoquinone in presence molecular O2, while photoexcited electrons are utilized revert catechol, reducing energy barrier synthesis. Notably, TPB-COF-OH demonstrates an unparalleled production rate 6608 μmol h–1 g–1, outperforming its counterpart, TPB-COF-OMe, which lacks unit. Furthermore, achieves solar-to-chemical conversion efficiency 0.84%, marking highest value among COF-based photocatalysts production. investigation not only underscores critical role engineering enhancing COF performance but also broadens horizon technologies.

Language: Английский

Citations

33
A Hydrazine‒Water Galvanic Cell‐Inspired Self‐Powered High‐Rate Hydrogen Production via Overall Hydrazine Electrosplitting DOI Open Access
Linjie Zhang, Man Li,

Chen Sun

et al.

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

Published: Jan. 2, 2025

Abstract Exploring advanced electrolysis techniques for attaining scene‐adaptive and on‐site green H 2 production is an imperative matter of utmost practical significance but grand challenge remains. Herein, drawn inspiration from a spontaneous hydrazine‒H O galvanic cell configured on low‐valence Ru single atoms‐loaded Mo C electrode (Ru SA /v‐Mo C), alternative energy solution utilizing self‐powered electrochemical hydrazine splitting (N 4 → 2H + N ) instead the stereotyped electricity‐consumed water proposed. This highlights pH‐decoupled primary battery with notable open‐circuit voltage 1.37 V density up to 358 Wh g N2H4 −1 , which powerfully propels alkaline cell, leading bilateral harvest remarkable rate 18 mol h m −2 i.e., 403.2 L setting new record self‐sustaining electricity‐powered systems. The success this further decoded by tandem theoretical in situ spectroscopic studies, cross‐verifying Ru‒Mo dual‐site synergy streamlining overall barriers, thereby enhancing kinetics reactions. pioneering work, showcasing free both external feedstock inputs, opens horizon way ultimate solution.

Language: Английский

Citations

1
Recent Advances in Applied Electrochemistry: A Review DOI Creative Commons
Paolo Yammine,

Hanna El‐Nakat,

Rima Kassab

et al.

Chemistry, Journal Year: 2024, Volume and Issue: 6(3), P. 407 - 434

Published: May 23, 2024

Applied electrochemistry (AE) plays today an important role in a wide range of fields, including energy conversion and storage, processes, environment, (bio)analytical chemistry, many others. Electrochemical synthesis is now proven as promising pathway to avoid all disadvantages terms high consumption pollution, while electrochemical modeling becomes powerful tool understand complex systems predict optimize the devices under various conditions, which reduce study time cost. The vital will greatly be considered upcoming years, aiming carbon footprints supporting transition towards green more sustainable framework. This review article summarizes recent advances applied electrochemistry. It shows how this field has become indispensable for innovation, progress, problem-solving modern world, addressing societal challenges across diverse fields.

Language: Английский

Citations

3
Conductivity-mediated in situ electrochemical reconstruction of CuOx for nitrate reduction to ammonia DOI
Hao Liang, Yinqiao Zhang, Xiaona Zhang

et al.

Nanoscale, Journal Year: 2024, Volume and Issue: 16(29), P. 13895 - 13904

Published: Jan. 1, 2024

CP/CuO x with suitable copper valence states obtained by fine-tuning the conductivity of electrochemical reconstruction may provide a competitive cathode catalyst for achieving excellent activity and selectivity NO 3 − -to-NH conversion.

Language: Английский

Citations

3
Ni3V2O8 Nanospheres for Sustained and Efficient Enhancement of Electrocatalytic H2O2 Production in pH-Universal Solutions DOI
Zhikang Bao, Wenjuan Fang, Jiayuan Li

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(16), P. 12140 - 12151

Published: July 30, 2024

Electrosynthesis of hydrogen peroxide (H2O2) is an energy-efficient and environmentally friendly approach with the potential for on-site generation application but severely constrained by lack efficient stable catalysts to activate two-electron oxygen reduction reaction high selectivity generate H2O2 in yield. Herein, we report a nickel vanadate catalyst (Ni3V2O8-NS) featuring selectivity, activity, stability. The Ni3V2O8-NS exhibited across pH-universal electrolytes (acidic 92.28%, neutral 92.76%, basic 92.36%), giving record yield 44,010 mmol h–1 gcatalyst–1 (neutral) 38,043 (weakly acidic) customized flow cell displayed good stability during 10-cycles test (each cycle lasting 10 h) at concentration (10 wt %). Based on situ spectroscopic density functional theory calculations, effect Ni–V revealed, introduction V changing coordination environment surface Ni providing more suitable adsorption energy intermediate *OOH, resulting its catalytic activity. Furthermore, concept production was demonstrated through oxidative degradation dyes antibiotics. This work has designed metal promising electrocatalytic performance, shedding light practicality H2O2.

Language: Английский

Citations

3