Defective iron doped nickel sulfide as electrocatalyst for hydrogen evolution reaction

IF 4.3 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of Physics and Chemistry of Solids Pub Date : 2025-06-19 DOI:10.1016/j.jpcs.2025.112924

Shraddhanjali Senapati , Lingaraj Pradhan , Bishnupad Mohanty , Rajaram Bal , Manoj Mohapatra , Bijayalaxmi Jena

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引用次数: 0

Abstract

Exploring efficient and economic electrocatalyst to replace the expensive noble metal based materials toward the hydrogen evolution reaction has indispensable role for water splitting reaction. NiFe based materials have good hydrogen and oxygen evolution reaction efficiency but still were further explored to enhance their catalytic activity. In this work, we report, Fe doped NiS electrocatalyst for water electrolysis process. Additionally, the improvement of activity was done by creating sulphur vacancy following in situ NaBH₄ treatment in Fe doped NiS electrocatalyst, and named as Vs-Fe doped NiS. The catalyst exhibits magnificent HER performance with ultralow overpotential of 88 mV and 117 mV at a current density of 10 mA/cm² (J₁₀) and 20 mA/cm² (J₂₀), having a low Tafel slope value of 61 mV/dec in 1 M KOH solution. This material is highly stable for 12 h. Fe doping and vacancy creation in NiS results in an increase in charge movement, higher surface area and hence improved efficiency.

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缺陷铁掺杂硫化镍作为析氢反应的电催化剂

探索高效经济的电催化剂替代昂贵的贵金属基材料用于析氢反应，对解水反应具有不可缺少的作用。NiFe基材料具有良好的析氢、析氧反应效率，但其催化活性还有待进一步研究。在这项工作中，我们报道了Fe掺杂NiS电催化剂用于水电解过程。此外，在Fe掺杂NiS电催化剂中，通过原位NaBH4处理产生硫空位来提高活性，并命名为Vs-Fe掺杂NiS。该催化剂在电流密度为10 mA/cm2 （J10）和20 mA/cm2 （J20）时的过电位分别为88 mV和117 mV，在1 M KOH溶液中Tafel斜率为61 mV/dec，表现出优异的HER性能。这种材料在12小时内高度稳定。在NiS中掺杂铁和产生空位导致电荷运动增加，表面积增加，从而提高了效率。

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来源期刊

Journal of Physics and Chemistry of Solids 工程技术-化学综合

CiteScore

7.80

自引率

2.50%

发文量

605

审稿时长

40 days

期刊介绍： The Journal of Physics and Chemistry of Solids is a well-established international medium for publication of archival research in condensed matter and materials sciences. Areas of interest broadly include experimental and theoretical research on electronic, magnetic, spectroscopic and structural properties as well as the statistical mechanics and thermodynamics of materials. The focus is on gaining physical and chemical insight into the properties and potential applications of condensed matter systems. Within the broad scope of the journal, beyond regular contributions, the editors have identified submissions in the following areas of physics and chemistry of solids to be of special current interest to the journal: Low-dimensional systems Exotic states of quantum electron matter including topological phases Energy conversion and storage Interfaces, nanoparticles and catalysts.