ZIF-67 derivatives in electrocatalysis

Coordination Chemistry Reviews, Год журнала: 2024, Номер 523, С. 216296 - 216296

Опубликована: Ноя. 2, 2024

Язык: Английский

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Interface Engineering Induced by Low Ru Doping in Ni/Co@NC Derived from Ni-ZIF-67 for Enhanced Electrocatalytic Overall Water Splitting

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(44), С. 60310 - 60320

Опубликована: Окт. 23, 2024

Electrochemical water splitting is a promising approach for hydrogen evolution reactions (HER); however, the oxygen reaction (OER) remains major bottleneck due to its high energy requirements. High-performance electrocatalysts capable of facilitating HER, OER, and overall (OWS) are highly needed improve OER kinetics. In this work, we synthesized trimetallic heterostructure Ru, Ni, Co incorporated into N-doped carbon (denoted as Ru/Ni/Co@NC) by first synthesizing Ni/Co@NC from Ni-ZIF-67 polyhedrons via high-temperature carbonization, followed Ru doping using galvanic replacement method. Benefiting increased active surface sites, modulated electronic structure, enhanced interfacial synergistic effects, Ru/Ni/Co@NC exhibited exceptional electrocatalytic performance both HER processes. The optimized catalyst, with minimal mass ratio ∼2.07%, demonstrated significantly low overpotential values 34 mV 174 at current density 10 mA/cm2 corresponding Tafel slope 33.42 34.39 mV/dec, respectively. Further, catalyst was loaded onto paper used anode cathode materials alkaline splitting. Interestingly, cell voltage just 1.44 V obtained. electrolytic further elaborated functional theory (DFT) calculations, which confirmed that in Ni/Co introduced additional sites H*, enhancing adsorption/desorption abilities (ΔGH* = -0.30 eV), lowering dissociation barrier (ΔGb 0.49 eV) reducing rate-determining step (O* → OOH*) 1.62 eV an environment. These findings reflect significant potential ZIF-67-based catalysts conversion storage applications.

Язык: Английский

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In situ exsolution-induced formation of amorphous/crystalline heterointerfaces in Ba0.6Sr0.4Co0.8Fe0.2O3-δ for enhanced oxygen electrocatalysis in zinc-air batteries

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 127, С. 530 - 540

Опубликована: Апрель 15, 2025

Язык: Английский

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Cobalt/nitrogen co-doped carbon nanosheets from coal-based graphene quantum dots boosted oxygen reduction

Fuel, Год журнала: 2024, Номер 380, С. 133153 - 133153

Опубликована: Сен. 17, 2024

Язык: Английский

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