Sulfur-doped cobalt molybdenum oxide with a hydrangea-like structure for bi-functionally efficient overall water splitting

Dong, Jie; Chen, Saiyi; Lv, Cuncai; Humphrey, Mark G.; Zhang, Chi; Huang, Zhipeng

doi:10.1039/d3ta07380g

Cited by 3 publications

(1 citation statement)

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“…Oxygen vacancies and mesoporosity are crucial for its excellent HER performance. Dong et al 9 reported that a hydrothermal process synthesized sulfur-doped cobalt molybdenum oxide. Such an electrocatalyst showed improved electrocatalytic performance owing to the modified composition and morphology.…”

Section: ■ Introductionmentioning

confidence: 99%

Surface Ammonium Ions Assisted Decoration of Monodisperse Cobalt Nanoparticles on Molybdenum Oxide Films as Efficient Electrocatalysts for Hydrogen Evolution Reaction

Xu,

Xiao,

et al. 2024

Langmuir

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The high expense associated with electrocatalysts poses a challenge to the advancement of a hydrogen-based energy economy. The utilization of nonprecious metal-based electrocatalysts that are easily prepared and cost-effective is imperative for the future sustainability of a hydrogen society. The semiconductive MoO3–x has been identified as a promising nonprecious electrocatalyst for the hydrogen evolution reaction (HER). Nevertheless, enhancing its relatively low electrocatalytic activity toward HER remains a top priority. This study illustrates the manipulation of surface ammonium ions (NH4 +) to produce uniform and distinct cobalt nanoparticles (Co NPs) on active MoO3–x supports, resulting in a more effective heterostructured composite electrocatalyst for HER. The presence of NH4 + ions in the MoO3–x film was extensively examined using infrared spectroscopy, X-ray photoelectron spectroscopy, and UV–visible colorimetric techniques. Additionally, the firmly attached NH4 + ions were employed as binding sites to precipitate Co-containing complex ions. Due to the monolayer-like adsorption of NH4 + ions, only a small quantity of Co precipitate was formed, which was subsequently electrochemically transformed into Co atoms that diffused and created well-separated uniform metallic Co nanoparticles (with an average size of less than 10 nm) on the MoO3–x film. The resulting heterostructure displays a 4.5-fold increase in current density for HER compared to the MoO3–x electrocatalyst through electrochemical assessments. The enhanced catalytic activity was ascribed to the optimized adsorption/desorption of the species involved in water reduction at the heterointerfaces and improved charge transfer rates. These nanoheterostructures hold great promise for a variety of applications in heterogeneous electrocatalysis, while the novel approach could potentially direct the creation of more heterostructures.

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Section: ■ Introductionmentioning

confidence: 99%

Surface Ammonium Ions Assisted Decoration of Monodisperse Cobalt Nanoparticles on Molybdenum Oxide Films as Efficient Electrocatalysts for Hydrogen Evolution Reaction

Xu,

Xiao,

et al. 2024

Langmuir

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High entropy catalysts in electrolytic water splitting: A review from properties to applications

Zhang,

Yu,

Dong

et al. 2024

Chemical Engineering Journal

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Synergistic effects of interface and phase engineering on telluride toward alkaline/neutral hydrogen evolution reaction in freshwater/seawater

Li,

Chen,

et al. 2024

Journal of Colloid and Interface Science

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Sulfur-doped cobalt molybdenum oxide with a hydrangea-like structure for bi-functionally efficient overall water splitting

Abstract: Developing an efficient bi-functional water-splitting catalyst is crucial for advancing sustainable hydrogen energy applications. A novel sulfur-doped cobalt molybdenum oxide (S-CoMoO) catalyst with a hydrangea-like structure was synthesized in situ...

Cited by 3 publications

References 69 publications

Surface Ammonium Ions Assisted Decoration of Monodisperse Cobalt Nanoparticles on Molybdenum Oxide Films as Efficient Electrocatalysts for Hydrogen Evolution Reaction

Surface Ammonium Ions Assisted Decoration of Monodisperse Cobalt Nanoparticles on Molybdenum Oxide Films as Efficient Electrocatalysts for Hydrogen Evolution Reaction

High entropy catalysts in electrolytic water splitting: A review from properties to applications

Synergistic effects of interface and phase engineering on telluride toward alkaline/neutral hydrogen evolution reaction in freshwater/seawater

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