Fine-tuning surface oxidation states of ruthenium nanoparticles to enhance hydrogen electrode reactions

Zhao, Hong; Li, Jiejie; Zou, Jian; Chen, Chi; Yang, Bo; Cheng, Qian; Yang, Hui

doi:10.1039/d3ta02313c

Cited by 2 publications

(1 citation statement)

References 37 publications

(30 reference statements)

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“…In contrast, Ru-CCP-700 displayed a higher overpotential of 201 mV, and the metal-free carbon material CNC-500 exhibited a poor HER performance. Furthermore, the HER activity of Ru-CCP-500 stands remarkable and makes it competitive with or even superior to many catalysts reported in previous studies. ,,− A comparison of the HER overpotential in the alkaline medium for both previously reported catalysts and this study is provided in Table S4.…”

Section: Resultsmentioning

confidence: 60%

The Role of Nitrogen Doping in Modulating Ruthenium Nanocatalysts for Enhanced Electrochemical Hydrogen Evolution Reaction in Alkaline Medium

Korampattu,

Barik,

Pandikassala

et al. 2024

Chem. Mater.

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Nitrogen doping has become a fundamental approach to enhance the catalytic performance of carbon materials across various applications. The introduction of nitrogen creates defects and active sites, promoting the formation of small metal particles and strengthening the metal–support interaction within carbon materials. However, the challenge lies in developing sustainable and cost-effective methods for synthesizing nitrogen-doped carbon materials. In this study, we present a sustainable approach for the synthesis of ruthenium on nitrogen-doped carbon catalysts (Ru-CCP) using chitosan as a nitrogen and carbon source. Unlike traditional methods, our process avoids the use of additional nitrogen precursors and templates, streamlining the synthesis while using a renewable resource. The synthesized material exhibits an exceptional performance in the electrochemical hydrogen evolution reaction (HER) in alkaline conditions by achieving a current density of 25 mA cm–2 at an impressively low overpotential of 46 mV, outperforming Pt/C under similar conditions. The detailed studies on structural and electronic properties of the materials using X-ray absorption spectroscopy (XAS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and transmission electron microscopy (TEM) revealed that the remarkable catalytic activity is upheld by the unique interplay between Ruδ+ and surface nitrogen moieties, notably pyridinic and pyrrolic nitrogen. Here, we demonstrate the control of particle size and electronic environment around the metal atom via the interaction of nitrogen and unravel the role of nitrogen doping in tuning the catalytic performance. In addition, this work offers insights into efficient HER catalyst design and emphasizes the potential of biomass-derived materials like chitosan in advancing clean hydrogen production for renewable energy applications.

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Section: Resultsmentioning

confidence: 60%

The Role of Nitrogen Doping in Modulating Ruthenium Nanocatalysts for Enhanced Electrochemical Hydrogen Evolution Reaction in Alkaline Medium

Korampattu,

Barik,

Pandikassala

et al. 2024

Chem. Mater.

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Latest progresses of Ru-based catalysts for alkaline hydrogen oxidation reaction: From mechanism to application

Cong,

Wang,

Liu

et al. 2024

Applied Catalysis A: General

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Fine-tuning surface oxidation states of ruthenium nanoparticles to enhance hydrogen electrode reactions

Abstract: The surface oxidation state of nano-sized electrocatalysts is a critical yet often overlooked factor for their electrocatalysis. Neglecting this aspect can lead to misinterpretation of the underlying catalytic mechanism and...

Cited by 2 publications

References 37 publications

The Role of Nitrogen Doping in Modulating Ruthenium Nanocatalysts for Enhanced Electrochemical Hydrogen Evolution Reaction in Alkaline Medium

The Role of Nitrogen Doping in Modulating Ruthenium Nanocatalysts for Enhanced Electrochemical Hydrogen Evolution Reaction in Alkaline Medium

Latest progresses of Ru-based catalysts for alkaline hydrogen oxidation reaction: From mechanism to application

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