Rare-earth europium heterojunction electrocatalyst for hydrogen evolution linking to glycerol oxidation

Yang, Zhou; Niu, Hongwei; Xia, L.; Li, Le; Xiang, Meng; Yu, Chengbin; Zhang, Zhiqian; Dong, Shuang

doi:10.1016/j.ijhydene.2023.05.058

Cited by 10 publications

(5 citation statements)

References 40 publications

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“…[ 39 ] However, the 0.04 RuO 2 @NiS 2 , 0.06 RuO 2 @NiS 2 , and 0.08 RuO 2 @NiS 2 show smaller R ct than NiS 2 , leading to the smaller impedance, which demonstrates the formation of heterojunction reduces the transfer resistance in the solution. [ 40 ] Besides, the bulk RuO 2 has larger R s than others, leading to its larger impedance. In 1 m KOH + 0.1 m gly, all of the samples have smaller impedances than those in 1 m KOH.…”

Section: Resultsmentioning

confidence: 99%

Ultralow RuO₂ Doped NiS₂ Heterojunction as a Multifunctional Electrocatalyst for Hydrogen Evolution linking to Biomass Organics Oxidation

Yang,

Chen,

Bei

et al. 2024

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Hydrogen energy and biomass energy are green and sustainable forms that can solve the energy crisis all over the world. Electrocatalytic water splitting is a marvelous way to produce hydrogen and biomass platform molecules can be added into the electrolyte to reduce the overpotential and meanwhile are converted into some useful organics, but the key point is the design of electrocatalyst. Herein, ultralow noble metal Ru is doped into NiS2 to form RuO2@NiS2 heterojunction. Amongst them, the 0.06 RuO2@NiS2 has low overpotentials of 363 mV for OER and 71 mV for HER in 1 m KOH, which are superior to the RuO2 and Pt/C. Besides, the 0.06 RuO2@NiS2 shows a low overpotential of 173 mV in 1 m KOH+0.1 m glycerol, and the glycerol is oxidized to glyceraldehyde and formic acid via the high Faraday efficiency GlyOR process, and the splitting voltage is only 1.17 V. In addition, the 0.06 RuO2@NiS2 has a low overpotential of 206 mV in 1 m KOH+0.1 m glucose, and the glucose is converted to glucaric acid, lactic acid, and formic acid. This work has a “one stone three birds” effect for the production of hydrogen, low splitting voltage, and high‐value‐added biomass chemicals.

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Section: Resultsmentioning

confidence: 99%

Ultralow RuO₂ Doped NiS₂ Heterojunction as a Multifunctional Electrocatalyst for Hydrogen Evolution linking to Biomass Organics Oxidation

Yang,

Chen,

Bei

et al. 2024

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“…Like the cyclic voltammetry result, the vertically prepared sample offered a higher current than the horizontally prepared sample. This indicates the existence of an anisotropic structure in the sample [ 66 , 67 ]. In addition, the CNC/chitosan sample possessed higher current values than the only chitosan sample due to the relatively dense internal structure of the CNC-embedded sample.…”

Section: Resultsmentioning

confidence: 99%

Cellulose Nanocrystal Embedded Composite Foam and Its Carbonization for Energy Application

Ahn,

Yu,

Song

2023

Polymers

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In this study, we fabricated a cellulose nanocrystal (CNC)-embedded aerogel-like chitosan foam and carbonized the 3D foam for electrical energy harvesting. The nanocrystal-supported cellulose foam can demonstrate a high surface area and porosity, homogeneous size ranging from various microscales, and a high quality of absorbing external additives. In order to prepare CNC, microcrystalline cellulose (MCC) was chemically treated with sulfuric acid. The CNC incorporates into chitosan, enhancing mechanical properties, crystallization, and generation of the aerogel-like porous structure. The weight percentage of the CNC was 2 wt% in the chitosan composite. The CNC/chitosan foam is produced using the freeze-drying method, and the CNC-embedded CNC/chitosan foam has been carbonized. We found that the degree of crystallization of carbon structure increased, including the CNCs. Both CNC and chitosan are degradable materials when CNC includes chitosan, which can form a high surface area with some typical surface-related morphology. The electrical cyclic voltammetric result shows that the vertical composite specimen had superior electrochemical properties compared to the horizontal composite specimen. In addition, the BET measurement indicated that the CNC/chitosan foam possessed a high porosity, especially mesopores with layer structures. At the same time, the carbonized CNC led to a significant increase in the portion of micropore.

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“…[6,9,10] Therefore, efficient electrocatalysts with low anodic overpotentials must be developed to enhance the overall catalytic efficiency in comparison with the benchmark OER electrocatalysts such as IrO 2 /RuO 2 . [11,12] Several oxidation methodologies using urea, [13] methanol, [14] glycerol, [15,16] and hydrazine hydrate [17] have been established for the substitute of OER in electrochemical reactions for energy conservation. Particularly, ureaassisted water splitting is a safe, non-toxic oxidation reaction that requires a minimal potential of (0.37 V), which is lower than OER (1.23 V).…”

Section: Introductionmentioning

confidence: 99%

Novel Heterostructure‐Based CoFe and Cobalt Oxysulfide Nanocubes for Effective Bifunctional Electrocatalytic Water and Urea Oxidation

Mariappan,

Mannu,

Ranjith

et al. 2024

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The development of effective oxygen evolution reaction (OER) and urea oxidation reaction (UOR) on heterostructure electrocatalysts with specific interfaces and characteristics provides a distinctive character. In this study, heterostructure nanocubes (NCs) comprising inner cobalt oxysulfide (CoOS) NCs and outer CoFe (CF) layered double hydroxide (LDH) are developed using a hydrothermal methodology. During the sulfidation process, the divalent sulfur ions (S2−) are released from the breakdown of the sulfur source and react with the Co‐precursors on the surface leading to the transformation of CoOH nanorods into CoOS nanocubes. Further, X‐ray photoelectron spectroscopy (XPS) and X‐ray absorption spectroscopy (XAS) analyses reveal that the interactions at the interface of the CF@CoOS NCs significantly altered the electronic structure, thus enhancing the electrocatalytic performance. The optimal catalysts exhibited effective OER and UOR activities, the attained potentials are 1.51 and 1.36 V. This remarkable performance is attributable to the induction of electron transfer from the CoFe LDH to CoOS, which reduces the energy barrier of the intermediates for the OER and UOR. Furthermore, an alkaline water and urea two‐cell electrolyzer assembled using CF@CoOS‐2 NCs and Pt/C as the anode and cathode requires a cell voltage of 1.63 and 1.56 V along with a durability performance.

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Rare-earth europium heterojunction electrocatalyst for hydrogen evolution linking to glycerol oxidation

Cited by 10 publications

References 40 publications

Ultralow RuO₂ Doped NiS₂ Heterojunction as a Multifunctional Electrocatalyst for Hydrogen Evolution linking to Biomass Organics Oxidation

Ultralow RuO₂ Doped NiS₂ Heterojunction as a Multifunctional Electrocatalyst for Hydrogen Evolution linking to Biomass Organics Oxidation

Cellulose Nanocrystal Embedded Composite Foam and Its Carbonization for Energy Application

Novel Heterostructure‐Based CoFe and Cobalt Oxysulfide Nanocubes for Effective Bifunctional Electrocatalytic Water and Urea Oxidation

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Rare-earth europium heterojunction electrocatalyst for hydrogen evolution linking to glycerol oxidation

Cited by 10 publications

References 40 publications

Ultralow RuO2 Doped NiS2 Heterojunction as a Multifunctional Electrocatalyst for Hydrogen Evolution linking to Biomass Organics Oxidation

Ultralow RuO2 Doped NiS2 Heterojunction as a Multifunctional Electrocatalyst for Hydrogen Evolution linking to Biomass Organics Oxidation

Cellulose Nanocrystal Embedded Composite Foam and Its Carbonization for Energy Application

Novel Heterostructure‐Based CoFe and Cobalt Oxysulfide Nanocubes for Effective Bifunctional Electrocatalytic Water and Urea Oxidation

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Ultralow RuO₂ Doped NiS₂ Heterojunction as a Multifunctional Electrocatalyst for Hydrogen Evolution linking to Biomass Organics Oxidation

Ultralow RuO₂ Doped NiS₂ Heterojunction as a Multifunctional Electrocatalyst for Hydrogen Evolution linking to Biomass Organics Oxidation