Hydrogen production via alkaline seawater electrolysis using iron-doped nickel diselenide as an efficient bifunctional electrocatalyst

IF 6.7 2区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Materials Today Chemistry Pub Date : 2024-09-01 DOI:10.1016/j.mtchem.2024.102276

Vipin Yadav, Naduvile Purayil Dileep, Namitha Nair, Pritish Kumar Behura, Manikoth M. Shaijumon

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Abstract

Green hydrogen production via seawater electrolysis is a promising pathway towards sustainable energy future. However, seawater splitting is hindered by the low stability and selectivity of electrocatalysts towards hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and faces severe electrode corrosion. Herein, we report the synthesis of highly active and durable Fe-doped nickel diselenide (Fe–NiSe) nanoparticles supported on nickel foam as bifunctional electrocatalysts for efficient alkaline seawater electrolysis via an electrodeposition method followed by low-temperature annealing. The electrocatalytic properties of as-prepared Fe–NiSe toward HER and OER are investigated in different electrolytes. The optimized electrocatalyst (20-Fe-NiSe) shows very low overpotential of 92 and 96 mV in alkaline (1.0 M KOH) and simulated seawater (1.0 M KOH + 0.5 M NaCl) electrolytes, respectively, to reach the current density of 10 mA cm for HER. For the OER, 20-Fe-NiSe exhibits an overpotential of 333 and 311 mV in alkaline and simulated seawater electrolytes, respectively, to attain a current density of 100 mA cm. Further, full-cell studies are carried out with 20-Fe-NiSe as bifunctional electrocatalysts, which requires cell potential of 1.83 V and 1.81 V to deliver a current density of 100 mA cm in alkaline and simulated seawater electrolytes, respectively. Additionally, the electrode shows tremendous potential for use in alkaline seawater electrolysis with stability over 100 h, at a current density of 100 mA cm, which is achieved at a low cell voltage of 1.87 V. The present work offers a simple, efficient, and cost-effective method for the development of heterogeneous Fe-doped nickel diselenide electrocatalysts for seawater electrocatalysis.

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使用掺铁二硒化镍作为高效双功能电催化剂，通过碱性海水电解制氢

通过海水电解进行绿色制氢是实现未来可持续能源的一条大有可为的途径。然而，海水电解由于电催化剂对氢进化反应（HER）和氧进化反应（OER）的稳定性和选择性较低而受到阻碍，并面临严重的电极腐蚀。在此，我们报告了通过电沉积法和低温退火法合成了高活性和耐久性的铁掺杂二硒化镍（Fe-NiSe）纳米粒子，并将其支撑在泡沫镍上，作为高效碱性海水电解的双功能电催化剂。研究了所制备的 Fe-NiSe 在不同电解质中对 HER 和 OER 的电催化特性。优化后的电催化剂（20-Fe-NiSe）在碱性（1.0 M KOH）和模拟海水（1.0 M KOH + 0.5 M NaCl）电解质中的过电位分别为 92 mV 和 96 mV，对 HER 的电流密度为 10 mA cm。对于 OER，20-Fe-NiSe 在碱性和模拟海水电解质中的过电位分别为 333 和 311 mV，电流密度为 100 mA cm。此外，还利用 20-Fe-NiSe 作为双功能电催化剂进行了全电池研究，在碱性和模拟海水电解质中，电池电位分别为 1.83 V 和 1.81 V，才能产生 100 mA cm 的电流密度。此外，该电极在碱性海水电解中显示出巨大的应用潜力，在 1.87 V 的低电池电压下，电流密度达到 100 mA cm，稳定性超过 100 小时。

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来源期刊

Materials Today Chemistry Multiple-

CiteScore

8.90

自引率

6.80%

发文量

596

审稿时长

33 days

期刊介绍： Materials Today Chemistry is a multi-disciplinary journal dedicated to all facets of materials chemistry. This field represents one of the fastest-growing areas of science, involving the application of chemistry-based techniques to the study of materials. It encompasses materials synthesis and behavior, as well as the intricate relationships between material structure and properties at the atomic and molecular scale. Materials Today Chemistry serves as a high-impact platform for discussing research that propels the field forward through groundbreaking discoveries and innovative techniques.