Novel V-doped CuCoN0.6/Ni4N heterojunction for boosting water electrolysis by facilitating water dissociation and H* adsorption-desorption kinetics

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 80, P. 1432 - 1440

Published: July 26, 2024

Language: Английский

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Hollow and Ultrathin Mo-Doped CoP Bamboo-Leaf Nanoarrays for pH-Universal Hydrogen Evolution

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(15), P. 17868 - 17876

Published: July 26, 2024

The rational design of cost-effective electrocatalysts for the hydrogen evolution reaction (HER) still remains a major challenge in continuable energy storage and conversion systems. In this study, vertically hollow ultrathin Mo-doped CoP (Mo-CoP) nanoarrays are prepared on nickel foam by hydrothermal low-temperature phosphating strategies. Mo-CoP possess bamboo-leaf structure with diameter ranging from 20 to 150 nm between top bottom length several microns. At same time, substance presents crystalline–amorphous structure. synergistic effect doping special construction can supply plentiful active sites, enhance electrolyte penetration, facilitate gas diffusion process electrocatalytic reaction. overpotentials electrode at 10 mA cm–2 as low 88.4, 78.7, 112.6 mV, Tafel slopes 87.2, 55.7, 120.3 mV dec–1 alkaline, acidic, neutral electrolytes, respectively. Moreover, catalyst also displays favorable long-term stability all pH ranges.

Language: Английский

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WS₂ Moiré Superlattices Supporting Au Nanoclusters and Isolated Ru to Boost Hydrogen Production

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

Published: Sept. 19, 2024

Abstract Maximizing the catalytic activity of single‐atom and nanocluster catalysts through modulation interaction between these components corresponding supports is crucial but challenging. Herein, guided by theoretical calculations, a nanoporous bilayer WS 2 Moiré superlattices (MSLs) supported Au nanoclusters (NCs) adjacent to Ru single atoms (SAs) (Ru 1 /Au n ‐2LWS ) developed for alkaline hydrogen evolution reaction (HER) first time. Theoretical analysis suggests that induced robust electronic metal–support effect in prone promote charge redistribution among SAs, NCs, MSLs support, which beneficial reduce energy barrier water adsorption thus promoting subsequent H formation. As feedback, well‐designed electrocatalyst exhibits outstanding HER performance with high ( η 10 = 19 mV), low Tafel slope (35 mV dec −1 ), excellent long‐term stability. Further, situ, experimental studies reveal reconstruction SAs/NCs S vacancies structure acts as main catalytically active center, while high‐valence NCs are responsible activating stabilizing sites prevent dissolution deactivation sites. This work offers guidelines rational design high‐performance atomic‐scale electrocatalysts.

Language: Английский

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Economical iron-based catalyst electrode for highly stable catalytic industrial-scale overall seawater splitting

Carbon Neutrality, Journal Year: 2024, Volume and Issue: 3(1)

Published: Nov. 25, 2024

Abstract The development of economical and stable catalyst electrodes for industrial-scale seawater splitting is one the current challenges in hydrogen production. transition metals possess high electrical conductivity offer potential designing with intrinsic activity through appropriate modifications, thus holding promising applications industrial contexts. Herein, a durable self-supported bifunctional electrode (Fe@Ni) efficiency large area successfully constructed by step in-situ deposition iron on porous structure nickel foam (NF) via mild (298 K) electroplating method. Transition like can be properly modified to achieve activity. Due growth cost-effective NF surface, surface morphology electronic are reconstructed, which significantly improves electrochemical electron transfer capability electrode. hydrogen/oxygen evolution reaction (HER/OER) simulated (1 M KOH + 0.5 NaCl) require only 129 mV 323 overpotentials density 100 mA cm −2 . Overall (OWS) achieves 10 at low voltage 1.49 V faradaic nearly 100%. More importantly, remain industrial-level (1.0 A ) more than 50 days. attractively, this work realizes universal construction large-area multiple (e.g., Fe, Cu, Al, etc simple process, provides new strategy research energy materials.

Language: Английский

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Regulation of interfacial microenvironment by introducing Co atoms into MoSP compounds with enhanced catalytic activity for overall water splitting

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: unknown, P. 177916 - 177916

Published: Dec. 1, 2024

Language: Английский

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