Flower-like nanoscale Ni(OH)2/MnCO3 electrocatalyst for efficient hydrogen evolution reaction in wide pH range

IF 6.7 1区工程技术 Q2 ENERGY & FUELS

Fuel Pub Date : 2025-03-23 DOI:10.1016/j.fuel.2025.135164

Zobia Siddique , Salman Noshear Arshad , Muhammad Ali Ehsan , Faryal Aftab , Akhtar Munir , Suryyia Manzoor , Sadia Fatima , Farah Sajjad , Javed Ahmad , Hatice Duran , Senem Çitoğlu

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Abstract

It is indispensable to develop efficient and cost-effective electrocatalysts, especially those that can work in a wide pH range for the HER (hydrogen evolution reaction) and OER (oxygen evolution reaction). In this study, we have devised a hydrothermal one-pot method for the production of Ni(OH)₂/MnCO₃ composite nanosheets on nickel foam having close resemblance with flowers. The electrocatalyst exhibited appreciable performance for HER with a minimum overpotential of −60 m V and −120 mV in acidic and alkaline media respectively, to deliver 10 mA cm⁻² current density. Tafel slope of 38 mV dec^-1 (in acidic) and 112 mV dec^-1 (in alkaline) medium under a limited potential range of 0 to −0.1 V was observed. The significant performance of such a hybrid system can be attributed to thin sheet morphology, the mutual support of Ni(OH)₂ and Mn(CO₃)₂, and possible generation of active sites at the interface and may contribute to the electrochemically active surface area i.e. 350 cm² (acidic) 190 cm² (alkaline). This study presents a novel approach to pave the way for advanced self-supported nanoscale materials to boost HER in both acidic and alkaline environments.

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来源期刊

Fuel 工程技术-工程：化工

CiteScore

12.80

自引率

20.30%

发文量

3506

审稿时长

64 days

期刊介绍： The exploration of energy sources remains a critical matter of study. For the past nine decades, fuel has consistently held the forefront in primary research efforts within the field of energy science. This area of investigation encompasses a wide range of subjects, with a particular emphasis on emerging concerns like environmental factors and pollution.