Activating lattice oxygen by a defect-engineered Fe2O3–CeO2 nano-heterojunction for efficient electrochemical water oxidation DOI Creative Commons

Qiuping Huang,

Guang‐Jie Xia, Bo Huang

et al.

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(14), P. 5260 - 5272

Published: Jan. 1, 2024

Self-supporting Fe 2 O 3 –CeO nano-heterojunction electrodes with rich oxygen vacancies present high catalytic performance for evolution reaction, where defect-engineering promotes the interfacial interaction and activates lattice oxygens.

Language: Английский

Phosphorus Defect Mediated Electron Redistribution to Boost Anion Exchange Membrane‐Based Alkaline Seawater Electrolysis DOI

Lili Guo,

Jing‐Qi Chi,

Tong Cui

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(31)

Published: May 20, 2024

Abstract It is of essential importance to design bifunctional electrocatalysts with excellent performance for both hydrogen evolution reaction (HER) and oxygen (OER) in seawater splitting. Herein, an approach manipulating electron redistribution NiCoP treated by P defect (P v ) engineering (NiCoP @NF) presented, exhibiting catalytic activities stability toward HER/OER alkaline solution. The reduces the surface electrooxidation reconfiguration energy barrier, making it easier drive local conversion crystals active oxy(hydroxide) OER. In addition, Ni site Co NiCoOOH are sites HER OER processes, respectively. situ generated PO 4 3− adsorbed on catalyst causes spatial repulsion, preventing Cl − corrosion electrolysis. AEM electrolyzer using @NF couple achieves high activity (2.43 V at 500 mA cm −2 long‐term durability (500 over 110 h). working efficiency 1.0 M KOH as 77.0% 100 price per GGE H 2 low $ 0.87.

Language: Английский

Citations

49
Iron‐Locked Hydr(oxy)oxide Catalysts via Ion‐Compensatory Reconstruction Boost Large‐Current‐Density Water Oxidation DOI Creative Commons

Jiao Liu,

Wei Du, Siying Guo

et al.

Advanced Science, Journal Year: 2023, Volume and Issue: 10(16)

Published: April 7, 2023

Nickel-iron based hydr(oxy)oxides have been well recognized as one of the best oxygen-evolving catalysts in alkaline water electrolysis. A crucial problem, however, is that iron leakage during prolonged operation would lead to oxygen evolution reaction (OER) deactivation over time, especially under large current densities. Here, NiFe-based Prussian blue analogue (PBA) designed a structure-flexible precursor for navigating an electrochemical self-reconstruction (ECSR) with Fe cation compensation fabricate highly active hydr(oxy)oxide (NiFeO

Language: Английский

Citations

47
Ultrafine NiFe‐Based (Oxy)Hydroxide Nanosheet Arrays with Rich Edge Planes and Superhydrophilic‐Superaerophobic Characteristics for Oxygen Evolution Reaction DOI
Han Jiao, Chun Wang, Ziyang Zhang

et al.

Small, Journal Year: 2023, Volume and Issue: 19(36)

Published: April 28, 2023

NiFe-based (oxy)hydroxides are the benchmark catalysts for oxygen evolution reaction (OER) in alkaline medium, however, it is still challenging to control their structures and compositions. Herein, molybdates (NiFe(MoO4 )x ) applied as unique precursors synthesize ultrafine Mo modified NiFeOx Hy (oxy)hydroxide nanosheet arrays. The electrochemical activation process enables molybdate ions (MoO42- gradually dissolve, at same time, hydroxide (OH- electrolyte diffuse into precursor react with Ni2+ Fe3+ confined space produce nanosheets (<10 nm), which densely arranged microporous arrays maintain rod-like morphology of precursor. Such dense rich edge planes on surface expose more active sites. More importantly, capillary phenomenon hydrophilic hydroxyl groups induce superhydrophilicity rough produces superaerophobic characteristic bubbles. With these advantages, optimized catalyst exhibits excellent performance OER, a small overpotential 182 mV 10 mA cm-2 long-term stability (200 h) 200 . Theoretical calculations show that modification enhances electron delocalization optimizes adsorption intermediates.

Language: Английский

Citations

45
Electrocatalysts for the oxygen evolution reaction: mechanism, innovative strategies, and beyond DOI
Wen Ning, Xiuling Jiao, Yuguo Xia

et al.

Materials Chemistry Frontiers, Journal Year: 2023, Volume and Issue: 7(20), P. 4833 - 4864

Published: Jan. 1, 2023

This review provides a comprehensive of recent advances in the design OER catalysts. Specifically, it focuses on kinetics and stability catalysts, catalytic mechanism innovative strategies.

Language: Английский

Citations

43
Activating lattice oxygen by a defect-engineered Fe2O3–CeO2 nano-heterojunction for efficient electrochemical water oxidation DOI Creative Commons

Qiuping Huang,

Guang‐Jie Xia, Bo Huang

et al.

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(14), P. 5260 - 5272

Published: Jan. 1, 2024

Self-supporting Fe 2 O 3 –CeO nano-heterojunction electrodes with rich oxygen vacancies present high catalytic performance for evolution reaction, where defect-engineering promotes the interfacial interaction and activates lattice oxygens.

Language: Английский

Citations

39