Unveiling the Reaction Mechanism of Nitrate Reduction to Ammonia Over Cobalt-Based Electrocatalysts

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(19), P. 12976 - 12983

Published: April 3, 2024

Electrocatalytic reduction of nitrate to ammonia (NRA) has emerged as an alternative strategy for sewage treatment and generation. Despite excellent performances having been achieved over cobalt-based electrocatalysts, the reaction mechanism well veritable active species across a wide potential range are still full controversy. Here, we adopt CoP, Co, Co3O4 model materials solve these issues. CoP evolves into core@shell structured CoP@Co before NRA. For Co catalysts, three-step relay is carried out superficial dynamical Coδ+ under low overpotential, while continuous hydrogenation from unveiled high overpotential. In comparison, stable steadily catalyze range. As result, exhibit much higher NRA activity than especially Moreover, performance although they experience same mechanism. A series characterizations clarify reason enhancement highlighting that core donates abundant electrons species, leading generation more hydrogen nitrogen-containing intermediates.

Language: Английский

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Interfacial engineering of heterostructured CoP/FeP nanoflakes as bifunctional electrocatalyts toward alkaline water splitting

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 679, P. 20 - 29

Published: Oct. 18, 2024

Language: Английский

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Highly active and durable NiCoP electrocatalyst through Ga ion intercalation strategy for long-lasting water electrolysis

Applied Surface Science, Journal Year: 2024, Volume and Issue: 660, P. 159972 - 159972

Published: March 24, 2024

Language: Английский

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Construction of Ni2P/CoP interface for highly efficient electrolysis of urea-assisted hydrogen production at industrial current densities

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2025, Volume and Issue: 69, P. 163 - 175

Published: Feb. 1, 2025

Language: Английский

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Constructing Chainmail-Structured CoP/C Nanospheres as Highly Active Anodic Electrocatalysts for Oxygen Evolution Reaction

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(13), P. 16309 - 16316

Published: March 20, 2024

Constructing highly active and noble metal-free electrocatalysts is significant for the anodic oxygen evolution reaction (OER). Herein, uniform carbon-coated CoP nanospheres (CoP/C) are developed by a direct impregnation coupling phosphorization approach. Importantly, CoP/C only takes small overpotential of 230 mV at current density 10 mA cm–2 displays Tafel slope 56.87 dec–1. Furthermore, intrinsic activity 21.44 times better than that commercial RuO2 under an 260 mV. In situ Raman spectroscopy studies revealed large number generated Co–O Co–OH species could facilitate *OH adsorption, effectively accelerating kinetics. Meanwhile, carbon shell with mesoporous pores acts as chainmail CoP, which improve surface area catalyst prevent Co sites from oxidative dissolution. This work provides facile effective reference development stable OER catalysts.

Language: Английский

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Interface reconstruction of NiCoP@NiMoP self-supported electrodes for highly efficient alkaline water/seawater electrolysis

Journal of Electroanalytical Chemistry, Journal Year: 2024, Volume and Issue: 968, P. 118532 - 118532

Published: July 26, 2024

Language: Английский

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Plasma‐Induced Oxygen Defect Engineering in Perovskite Oxide for Boosting Oxygen Evolution Reaction

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 2, 2024

Abstract Perovskite oxides are considered highly promising candidates for oxygen evolution reaction (OER) catalysts due to their low cost and adaptable electronic structure. However, modulating the structure of without altering nanomorphology is crucial understanding structure‐property relationship. In this study, a simple plasma bombardment strategy developed optimize catalytic activity perovskite oxides. Experimental characterization plasma‐treated LaCo 0.9 Fe 0.1 O 3 (P‐LCFO) reveals abundant vacancies, which expose numerous active sites. Additionally, X‐ray photoelectron spectroscopy absorption fine analyses indicate Co valence state in P‐LCFO, likely presence these contributes an optimized that enhances OER performance. Consequently, P‐LCFO exhibits significantly improved activity, with overpotential 294 mV at current density 10 mA cm −2 , outperforming commercial RuO 2 . This work underscores benefits engineering studying relationships developing oxide water splitting.

Language: Английский

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Trimetallic FeNiMo Nanofibers as High-Efficiency Electrocatalyst for Robust Oxygen Evolution

ACS Materials Letters, Journal Year: 2024, Volume and Issue: unknown, P. 3548 - 3556

Published: July 11, 2024

Language: Английский

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Atomic orbitals modulated dual functional bimetallic phosphides derived from MOF on MOF structure for boosting high efficient overall water splitting

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2024, Volume and Issue: 65, P. 113 - 125

Published: Oct. 1, 2024

Language: Английский

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Co/CoP@NC heterostructures as bifunctional catalysts to enhance the alkaline water splitting

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 81, P. 624 - 631

Published: July 26, 2024

Language: Английский

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