Assembly and Valence Modulation of Ordered Bimetallic MOFs for Highly Efficient Electrocatalytic Water Oxidation DOI Creative Commons

Yaling Wu,

Zhaopeng Sun, Yingying Chen

et al.

Molecules, Journal Year: 2024, Volume and Issue: 29(24), P. 5845 - 5845

Published: Dec. 11, 2024

Metal synergy can enhance the catalytic performance, and a prefabricated solid precursor guide ordered embedding, of secondary metal source ions for rapid synthesis bimetallic organic frameworks (MM'-MOFs) with stoichiometric ratio 1:1. In this paper, Co-MOF-1D containing well-defined binding sites was synthesized by mechanical ball milling, which used as template induced introduction Fe to successfully assemble Co1Fe1-MOF-74@2 (where @2 denotes template-directed MOF-74). Its electrocatalytic performance is superior that conventional one-step-synthesized Co1Fe1-MOF-74@1 @1 one-step MOF-74), two sources, Co Fe, close Meanwhile, iron valence states (FeII FeIII) in were further regulated obtain materials Co1Fe1(II)-MOF-74@2 Co1Fe1(III)-MOF-74@2. The electrochemical test results confirm state has better than Co1Fe1(III)-MOF-74@2 oxygen evolution reaction (OER) process. This phenomenon related gradual increase Co1Fe1(II)-MOF-74@2, promotes continuous improvement MOF before reaching optimal steady makes OER reach optimum when FeII/FeIII mixed-valence reaches certain proportion. provides new idea directed optimization highly efficient catalysts.

Language: Английский

Breaking Kinetic Barriers in the Electrooxidation of 5-Hydroxymethylfurfural over Ni-Based Catalysts via Rational Electronic Structure Modulation DOI
J. Wang, Wenru Zhao, Ziyi Zhao

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125229 - 125229

Published: March 1, 2025

Language: Английский

Citations

1
A versatile catalyst in situ self-cleaning method for excellent cycling and operational stability in small-molecule electrooxidation DOI Creative Commons
Zhixiang Yuan, Yingjie Gao, Shanqing Li

et al.

eScience, Journal Year: 2025, Volume and Issue: unknown, P. 100375 - 100375

Published: Jan. 1, 2025

Language: Английский

Citations

0
Heterogeneous Nickel Molybdenum Oxide Nanorods Conjugated Graphitic Carbon Nitride: A Bifunctional Electrocatalyst for Overall Water Splitting DOI

Shubham Mishra,

Vartika Sharma, Vaibhav Kulshrestha

et al.

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 3, 2025

The pursuit of sustainable energy solutions has driven extensive research into efficient and cost-effective water-splitting techniques. This study introduces a straightforward method employing nickel molybdenum oxide NiMoO4 (NMO) nanorods integrated with graphitic carbon nitride (g-CN) sheets as promising catalysts for water splitting. coupling between NMO g-CN leverages the distinctive properties both materials to boost robustness well effectiveness in catalysis oxygen evolution reaction (OER) hydrogen (HER). We systematically optimized nanostructure by adjusting reduction annealing temperature during calcination improve HER OER activities. NMO@g-CN-600 nanostructured catalyst demonstrates exceptional electrochemical activity acidic media, an overpotential 148 mV at 10 mA cm–2 current density, which is approximately 2.72 times lower than that bare 2.97 pristine catalysts. Under alkaline conditions, exhibited superior 252 reach density cm–2, outperforming Additionally, demonstrated excellent long-term stability chronoamperometric testing over 50 h basic environments, showing low Tafel slopes 97 98 dec–1, respectively. Various analytical methods confirmed successful synthesis structural prepared outstanding electrocatalytic position it feasible choice platinum-group-based overall electrolysis.

Language: Английский

Citations

0
Photoelectrocatalytic highly selective oxidation of glycerol to C3 products on Mo:BiVO4/NiOOH photoanodes DOI

Huili Gong,

Rufeng Tian,

Lu Niu

et al.

Journal of Electroanalytical Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 119019 - 119019

Published: Feb. 1, 2025

Language: Английский

Citations

0
Enhancing Oxygen Evolution Catalysis by Tuning the Electronic Structure of NiFe-Layered Double Hydroxides Through Selenization DOI Creative Commons
Ze Wang,

Yifang Liang,

Te‐Hua Fang

et al.

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(4), P. 294 - 294

Published: Feb. 14, 2025

Electrocatalytic water splitting is a critical approach for achieving carbon neutrality, playing an essential role in clean energy conversion. However, the slow kinetics of oxygen evolution reaction (OER) remains major bottleneck hindering conversion efficiency. Although noble metal catalysts (e.g., IrO2 and RuO2) show excellent catalytic activity, their high cost scarcity limit applicability large-scale industrial processes. In this study, we introduce novel electrocatalyst based on selenized NiFe-layered double hydroxides (NiFe-LDHs), synthesized via simple hydrothermal method. Its key innovation lies selenization process, during which Ni atoms lose electrons to form selenides, while selenium (Se) gains electrons. This leads significant increase concentration high-valent ions, enhances electronic mobility, improves structural stability catalyst through formation Ni-Se bonds. Experimental results that NiFe-LDHs exhibit electrocatalytic performance 1 M KOH alkaline solution. (OER), achieved ultra-low overpotential 286 mV at current density 10 mA cm⁻2, with Tafel slope 63.6 dec⁻1. After 60 h continuous testing, showed almost no degradation, far outperforming conventional catalysts. These highlight potential NiFe-LDH@selenized electrolysis applications, providing effective solution efficient sustainable production.

Language: Английский

Citations

0
Phosphorus‐Modulated Cobalt Nanosheets with Confined Metal Defects for Enhanced Kinetics in Nitrite‐Glycerol Co‐Electrolysis DOI Open Access
Zhangjing Yu, Kai Chen, Yun Tong

et al.

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

Published: March 27, 2025

Abstract Exploring advanced electrocatalysts for the paired electrolysis of nitrite reduction reaction (NO 2 RR) and glycerol oxidation (GOR) is significance co‐production value‐added chemicals, but remains a great challenge. Herein, novel phosphorus‐modulated cobalt nanosheet with low‐coordination metallic sites (P 3 ‐Co) developed as an electrocatalyst efficient nitrite‐glycerol co‐electrolysis. The membrane electrode assembled NO RR‖GOR electrolyzer realizes promising operation performance high Faradaic efficiencies yields NH (98.2%, 29.3 mg h −1 cm −2 ) formate (93.4%, 85.7 at 1.5 V, well superior catalytic stability over long‐term 300 100 mA . in situ characterizations theoretical calculations are employed to reveal origin intrinsic activity P ‐Co, suggesting that metal Co defects P‐modulation beneficial optimizing electronic structure adsorption/activation barriers N‐containing intermediates accelerated conversion kinetics both GOR RR. This work offers guidance exploiting highly‐active generation high‐value‐added products.

Language: Английский

Citations

0
Triggering Asymmetric Hybridization via Ni-Se-Co Electron Bridges on Rich Amorphous Heterostructured Nickel Selenide for Durable Alkaline Water Splitting DOI
Fan Jiang, Yicheng Wang,

Haoyu Peng

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125326 - 125326

Published: March 1, 2025

Language: Английский

Citations

0
Enhancing d-p orbital hybridization through oxygen vacancies boosting capacity and kinetics of layered double hydroxides for durable aqueous magnesium-ion batteries DOI

Weizhi Kou,

Zhitang Fang,

Yangyang Sui

et al.

Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

Citations

0
Construction of ultra-thin nanosheets with Ni-O-Co electron channels to accelerate electron transfer in electrooxidation of glucose to formic acid DOI
Zhihui Ma, Hongrui Guo, Pengfei Wang

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 163249 - 163249

Published: April 1, 2025

Language: Английский

Citations

0
Selective Electrochemical Amine‐to‐Nitrile Conversion on Nickel−Cobalt Hydrogen Phosphate Nanowires Coupled with Hydrogen Generation DOI
Yuan Dong,

Enhui Wei,

Yang Xu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 15, 2024

Abstract Developing highly active electrocatalysts for the benzylamine oxidation reaction (BOR) is very imperative organic compounds upgrading. Meanwhile, clarifying underlying BOR mechanism of remarkable significance but still confronts challenges. Herein, bimetallic nickel‐cobalt hydrogen phosphate nanowires (NiCo‐HPNWs) are put forward as a high‐performance anodic catalyst selective BOR. Furthermore, NiCo‐HPNWs used proof‐of‐concept model to understand synergistic effects between Ni and Co atoms during process. It found that shows excellent electrocatalytic performance, with small onset potential 0.265 V versus. Ag/AgCl high faradic efficiency (FE) 93.0% benzonitrile (BN) production at 0.40 Ag/AgCl. Also, FEs BN can reach ≈80% voltages from 1.50 1.65 by coupling evolution in two‐electrode electrolyzer. Potential‐dependent situ Raman spectroscopy sheds light on direct electro‐oxidation (BA) over catalyst. In combination X‐ray photoelectron density functional theory calculations, charge transfer behavior revealed, which endows favorable distribution promote BA adsorption desorption surface, thereby leading expedited kinetics enhanced electrochemical activity.

Language: Английский

Citations

1