Stimulating and Stabilizing Ultrafine Pt Clusters on Metalloid Support as Dual‐Site Electrocatalyst in High‐Density Seawater Electrolysis and Anion Exchange Membrane Electrolyzer DOI Open Access

Wen‐Li Yu,

Zengfeng Qiu,

Jinsong Wang

et al.

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

Published: March 16, 2025

Abstract Constructing synergistic dual sites has been well‐recognized as an updated avenue in constructing binary‐component Pt/support compounds such materials undergo undesirable interfacial barriers and complicated synthesis. Here integration of ultrafine Pt nanocrystals on oxygen‐deficient CoMoO 4 nanosheets is reported that achieved superior alkaline hydrogen evolution reaction (HER) activity (110 mV @ 1000 mA cm −2 ) with a reversed deliver effect between bifunctional active sites. With perceptions from comprehensive experimental theoretical results, the HER process occurs three steps: pronounced water dissociation capability , facile transfer to nanoparticles, optimized desorption catalytic site. Thanks site effect, Pt/CoMoO catalyst boosts large‐density seawater electrolysis anion exchange membrane electrolyzer (AEM). This work not only provides valid intensification strategy aimed at support‐type electrocatalysts but also takes insights into dual‐site mechanisms for high‐performance HER.

Language: Английский

Differentiated Modulating the Electronic Structure of NiFe@Ni/Fe‐MnOx via Phase Transformation Engineering to Synergy Promote Bifunctional Water Splitting Reactions DOI Open Access
Min Feng, Yu Tang, Zhimin Li

et al.

Small, Journal Year: 2025, Volume and Issue: 21(7)

Published: Jan. 7, 2025

Abstract Modulating electronic structure to balance the requirement of both hydrogen evolution reaction (HER) and oxygen (OER) is crucial for developing bifunctional catalysts. Herein, phase transformation engineering utilized separately regulate catalyst structure, designed NiFe@Ni/Fe‐MnOOH schottky heterojunction exhibits remarkable electrocatalytic activity with low overpotentials 19 230 mV at 10 mA cm −2 HER OER in 1M KOH, respectively. Meanwhile, an anion‐exchange membrane water electrolyzer employing as electrodes shows voltages 1.487/1.953 V 10/1000 , operating over 200 h 1000 . Combining theoretical calculations experiments reveal that can differentially active phases HER/OER. In HER, Ni/Fe‐MnOOH metallic NiFe act *OH *H acceptors respectively accelerates dissociation subsequent Heyrovsky/Tafel step. While OER, significant Jahn‐Teller effect Mn 3+ induces surface reconstruction from Ni/Fe‐MnO 2 The formative high value 4+ modify M‐O hybridization activate lattice mechanism, which pivotal breaking restriction volcanic relationship reducing overpotential. These findings provide valuable design guidelines high‐performance multi‐functional electrocatalysts via engineering.

Language: Английский

Citations

1
Defect-Rich Co(OH)2 Induced by Carbon Dots for Oxygen Evolution Reaction DOI Open Access
Xuan Han,

Chao Guo,

Hui Wang

et al.

Catalysts, Journal Year: 2025, Volume and Issue: 15(3), P. 219 - 219

Published: Feb. 26, 2025

Hydrogen production from water electrolysis offers a highly promising and sustainable route to solve the energy crisis. However, it is severely limited by sluggish kinetics of oxygen evolution reaction (OER) occurring on anode. Herein, employing carbon dots functionalized with benzene sulfonate groups (BS-CDs) as distinctive inductor, Co(OH)2 catalyst featuring abundant defects was synthesized for an enhanced OER. The hydrophilic nature BS-CDs exerts significant interfacial induction effect growth dynamics Co(OH)2, fostering formation elevated crystal substantial quantity vacancies. resulting BS-CDs/Co(OH)2 requires overpotential only 340 mV achieve current density 10 mA cm−2 in alkaline media, demonstrating markedly improved OER activity compared pristine N-CDs/Co(OH)2 induced amine-modified CDs. Furthermore, structural integrity maintained, retention rate 92% observed following 20 h stability assessment. This work provides novel approach developing cost-effective transition metal catalysts that exhibit exceptional catalytic efficiency excellent

Language: Английский

Citations

0
Design principles of non-noble metal catalysts for high-performance rechargeable Zn-air batteries DOI
Pengxiang Liu, Yaqian Wang, Ruitao Lv

et al.

Energy storage materials, Journal Year: 2025, Volume and Issue: unknown, P. 104155 - 104155

Published: March 1, 2025

Language: Английский

Citations

0
Iron and vanadium in perovskite hydroxide enabling the relay catalysis for oxygen evolution DOI
Qiming Sun,

W. Z. Zhong,

Yuxiao Liu

et al.

Rare Metals, Journal Year: 2025, Volume and Issue: unknown

Published: March 15, 2025

Language: Английский

Citations

0
Stimulating and Stabilizing Ultrafine Pt Clusters on Metalloid Support as Dual‐Site Electrocatalyst in High‐Density Seawater Electrolysis and Anion Exchange Membrane Electrolyzer DOI Open Access

Wen‐Li Yu,

Zengfeng Qiu,

Jinsong Wang

et al.

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

Published: March 16, 2025

Abstract Constructing synergistic dual sites has been well‐recognized as an updated avenue in constructing binary‐component Pt/support compounds such materials undergo undesirable interfacial barriers and complicated synthesis. Here integration of ultrafine Pt nanocrystals on oxygen‐deficient CoMoO 4 nanosheets is reported that achieved superior alkaline hydrogen evolution reaction (HER) activity (110 mV @ 1000 mA cm −2 ) with a reversed deliver effect between bifunctional active sites. With perceptions from comprehensive experimental theoretical results, the HER process occurs three steps: pronounced water dissociation capability , facile transfer to nanoparticles, optimized desorption catalytic site. Thanks site effect, Pt/CoMoO catalyst boosts large‐density seawater electrolysis anion exchange membrane electrolyzer (AEM). This work not only provides valid intensification strategy aimed at support‐type electrocatalysts but also takes insights into dual‐site mechanisms for high‐performance HER.

Language: Английский

Citations

0