Heterogeneous CoS2/MS2 microspheres for an efficient oxygen evolution reaction,Inorganic Chemistry Frontiers

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Heterogeneous CoS2/MS2 microspheres for an efficient oxygen evolution reaction
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2023-11-09 , DOI: 10.1039/d3qi01878d
Xiaoqu Wang _{1,

2} , Limin Wang ₁ , Karuppasamy Kohila Rani ₃ , Xinglan Peng ₁ , Yu Ning ₁ , Xiaotian Liu ₁ , Youjun Fan ₁ , Du-Hong Chen ₁ , Wei Chen ₁

Affiliation

Delicately fabricating efficient electro-catalysts to boost the catalytic kinetics of the oxygen evolution reaction (OER) is essential for realizing the efficient performance of water splitting into hydrogen to alleviate environmental issues and the energy crisis. Here, heterogeneous and hollow microspheres (denoted as CoS₂/MS₂-HPMS, M = Fe, FeCo) were obtained by the sulfurization of Fe³⁺-decorated ZIF-67 hollow microspheres (ZIF-67-HMS). At a current density of 10 mA cm⁻², the prepared CoS₂/MS₂-HPMS showed an overpotential of 217 mV for the OER, which is lower than that of commercial RuO₂ (336 mV). Density functional theory calculations demonstrated low reaction free energies of the intermediates of the OER and significant charge accumulation at the heterojunction interface between CoS₂ and FeCoS₂. This work establishes a method for the assembly of nanoparticles and the construction of heterojunctions.

中文翻译：

用于高效析氧反应的异质 CoS2/MS2 微球

精心制造高效电催化剂来提高析氧反应（OER）的催化动力学对于实现水分解成氢气的高效性能以缓解环境问题和能源危机至关重要。^{在此，通过Fe 3+}修饰的ZIF-67空心微球（ZIF-67-HMS）的硫化获得了异质空心微球（表示为CoS ₂ /MS _{2 -HPMS，M=Fe，FeCo）。}在10mA cm ^-2的电流密度下，制备的CoS ₂ /MS ₂ -HPMS显示出217mV的OER过电势，低于商业RuO ₂的过电势（336mV）。密度泛函理论计算表明OER中间体的反应自由能较低，并且CoS ₂和FeCoS ₂之间的异质结界面处有显着的电荷积累。这项工作建立了纳米颗粒组装和异质结构建的方法。

更新日期：2023-11-09

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