Multiscale design of 3D metal–organic frameworks (M−BTC, M: Cu, Co, Ni) via PLAL enabling bifunctional electrocatalysts for robust overall water splitting

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 446, P. 137045 - 137045

Published: May 18, 2022

Language: Английский

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Enhanced BiVO₄ Photoanode Photoelectrochemical Performance via Borate Treatment and a NiFeOx Cocatalyst

ACS Sustainable Chemistry & Engineering, Journal Year: 2021, Volume and Issue: 9(24), P. 8306 - 8314

Published: June 10, 2021

To settle the slow water oxidation kinetics and charge recombination of BiVO4 photoanodes, boron-treated combined with a NiFeOx electrocatalyst (NiFeOx/B/BiVO4) electrode is prepared. The resultant NiFeOx/B/BiVO4 demonstrates 5.22 mA/cm2 current density at 1.23 V vs RHE under AM 1.5 G illumination without any sacrificial agent. Significantly, applied bias photon-to-current efficiency photoanode reaches 1.96% 0.7 RHE, which much higher than that pristine BiVO4. Such excellent performance can be attributed to existence self-adsorbed [B(OH)4]− ligands electrocatalysts, enhancing separation photoelectron–hole pairs. This work provides way construct effective photocatalysts for solar splitting.

Language: Английский

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Oxygen vacancy–based metal oxides photoanodes in photoelectrochemical water splitting

Materials Today Sustainability, Journal Year: 2022, Volume and Issue: 18, P. 100118 - 100118

Published: Feb. 5, 2022

Language: Английский

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In Situ Grown Co‐Based Interstitial Compounds: Non‐3d Metal and Non‐Metal Dual Modulation Boosts Alkaline and Acidic Hydrogen Electrocatalysis

Small, Journal Year: 2021, Volume and Issue: 18(9)

Published: Dec. 16, 2021

Interfacial engineering and elemental doping are the two parameters to enhance catalytic behavior of cobalt nitrides for alkaline hydrogen evolution reaction (HER). However, simultaneously combining these improve HER properties in media is rarely reported also remains challenging acidic media. Herein, it demonstrated that high-valence non-3d metal non-metal integration can achieve Co-based nitride/oxide interstitial compound phase boundaries on stainless steel mesh (denoted Mo-Co5.47 N/N-CoO) efficient Density functional theory (DFT) calculations show unique structure does not only realize multi-active sites, enhanced water dissociation kinetics, low adsorption free energy media, but enhances positive charge density ions (H+ ) effectively allow H+ receive electrons from catalysts surface toward promoting As a result, as-prepared N/N-CoO demands overpotential -28 mV@10 mA cm-2 an medium, superior commercial Pt/C at current > 44 medium. This work paves useful strategy design cobalt-based electrocatalysts beyond.

Language: Английский

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“d‐Electron Complementation” Induced V‐Co Phosphide for Efficient Overall Water Splitting

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(38)

Published: Sept. 1, 2021

Abstract To generate “green hydrogen,” electrochemical water splitting is regarded as the most promising method, which requires highly efficient bifunctional electrocatalysts to accelerate hydrogen and oxygen evolution reactions (HER OER). Herein, a “d‐electron complementation” principle develop such candidates proposed. By taking advantage of filling characteristics 3d orbitals, vanadium‐cobalt phosphide (V‐CoP) synthesized. According X‐ray absorption fine structure photoelectron spectroscopy investigation, V can disorder coordination environment Co, leading increased/decreased charge density in Co(P)/Co(O). As result, V‐CoP shows impressive activity, only needs overpotentials 46 267 mV deliver 10 mA cm −2 for HER OER, respectively. Density functional theory calculations reveal that accelerated H 2 O dissociation process on VO x /CoO /CoP surface conversion kinetics V‐neighboring CoCo bridge site result promoted activity. Furthermore, up‐shifted d‐band center V‐CoOOH endows Co with lowered energy barrier OER. This work serves proof‐of‐concept application principle, be generalized guideline design novel catalysts.

Language: Английский

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Unveiling the promotion of accelerated water dissociation kinetics on the hydrogen evolution catalysis of NiMoO4 nanorods

Journal of Energy Chemistry, Journal Year: 2021, Volume and Issue: 67, P. 805 - 813

Published: Nov. 26, 2021

Language: Английский

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Highly accessible and dense surface single metal FeN₄ active sites for promoting the oxygen reduction reaction

Energy & Environmental Science, Journal Year: 2022, Volume and Issue: 15(6), P. 2619 - 2628

Published: Jan. 1, 2022

We boost the ORR performance of Fe–N–C electrocatalysts in acids by engineering highly accessible and dense surface single metal FeN 4 active sites.

Language: Английский

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CeO2 as an “electron pump” to boost the performance of Co4N in electrocatalytic hydrogen evolution, oxygen evolution and biomass oxidation valorization

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 325, P. 122364 - 122364

Published: Jan. 3, 2023

Language: Английский

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Directional regulating dynamic equilibrium to continuously update electrocatalytic interface for oxygen evolution reaction

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 431, P. 134040 - 134040

Published: Dec. 9, 2021

Language: Английский

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Metal-organic frameworks derived transition metal phosphides for electrocatalytic water splitting

Journal of Energy Chemistry, Journal Year: 2021, Volume and Issue: 68, P. 494 - 520

Published: Dec. 10, 2021

Language: Английский

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