Peptide templated AuPt alloyed nanoparticles as highly efficient bi-functional electrocatalysts for both oxygen reduction reaction and hydrogen evolution reaction

Wu, Wen Chung; Tang, Zhenghua; Wang, Kai; Liu, Zhen; Li, Ligui; Chen, Shaowei

doi:10.1016/j.electacta.2017.11.057

Cited by 44 publications

(31 citation statements)

References 57 publications

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“…Furthermore, all of the slope values are quite close with Pd/C, implying that a similar reaction mechanism was adopted for all of the samples. Such close Tafel slope values with Pd/C suggest that the rate-dominant step is probably the first-electron transfer to oxygen molecule, while the following reduction and the breaking of the O-O bond are relatively fast [48][49][50]. The above findings further confirm that Pd 50 Ru 50 /CNs exhibited slightly superior ORR activity than that of commercial Pd/C.…”

Section: Orr Performancesupporting

confidence: 64%

“…The positive binding energy shift of the Pd3d electrons in Pd 50 Ru 50 /CNs indicates that there is electron transfer occurring from the Pd atoms to the Ru atoms. Previous investigations have shown that such an electron transfer could facilitate the electrocatalytic reaction kinetics, and can therefore significantly enhance the catalytic activity [47][48][49]. The high-resolution XPS spectra of the Pd3d and Ru3d electrons of the other samples in the series are presented in Figure S6a,b, respectively.…”

Section: X-ray Diffraction (Xrd) and Xps Analysismentioning

confidence: 95%

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Oxygen Reduction Reaction and Hydrogen Evolution Reaction Catalyzed by Pd–Ru Nanoparticles Encapsulated in Porous Carbon Nanosheets

Tian

Tang

et al. 2018

Catalysts

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Developing bi-functional electrocatalysts for both oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) is crucial for enhancing the energy transfer efficiency of metal-air batteries and fuel cells, as well as producing hydrogen with a high purity. Herein, a series of Pd-Ru alloyed nanoparticles encapsulated in porous carbon nanosheets (CNs) were synthesized and employed as a bifunctional electrocatalyst for both ORR and HER. The TEM measurements showed that Pd-Ru nanoparticles, with a size of approximately 1-5 nm, were uniformly dispersed on the carbon nanosheets. The crystal and electronic structures of the Pd x Ru 100−x /CNs series were revealed by powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The as-prepared samples exhibited effective ORR activity in alkaline media and excellent HER activity in both alkaline and acid solutions. The Pd 50 Ru 50 /CNs sample displayed the best activity and stability among the series, which is comparable and superior to that of commercial 10% Pd/C. For ORR, the Pd 50 Ru 50 /CNs catalyst exhibited an onset potential of 0.903 V vs. RHE (Reversible Hydrogen Electrode) and 11.4% decrease of the current density after 30,000 s of continuous operation in stability test. For HER, the Pd 50 Ru 50 /CNs catalyst displayed an overpotential of 37.3 mV and 45.1 mV at 10 mA cm −2 in 0.1 M KOH and 0.5 M H 2 SO 4 , respectively. The strategy for encapsulating bimetallic alloys within porous carbon materials is promising for fabricating sustainable energy toward electrocatalysts with multiple electrocatalytic activities for energy related applications.

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Section: Orr Performancesupporting

confidence: 64%

Section: X-ray Diffraction (Xrd) and Xps Analysismentioning

confidence: 95%

Oxygen Reduction Reaction and Hydrogen Evolution Reaction Catalyzed by Pd–Ru Nanoparticles Encapsulated in Porous Carbon Nanosheets

Tian

Tang

et al. 2018

Catalysts

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“…Conversion of aromatic nitro‐compunds (Ar‐NO 2 ) to amino compounds (Ar‐NH 2 ) by direct reduction of –NO 2 group is considered to be an efficient process due to the high applicability of the amino compounds in pharmaceuticals products, dyes, agrochemicals and polymer . With the pioneering work of Pal et al .…”

Section: Resultsmentioning

confidence: 99%

Self‐Assembled Monolayer Stabilized Gold‐Vanadate Nanoflute for Water Splitting Reactions

et al. 2019

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Vanadium oxide (VOx) decorated with gold‐nanoparticles via self‐assembled monolayer approach is herein reported to be an efficient electrocatalyst for both oxygen and hydrogen evolution reactions (OER and HER) in alkali medium. The voids created in the nanoflute of gold‐vanadate were believed to be responsible for high mass transfer allowing the material to be highly applicable as a catalyst for water splitting and nitro‐arene reduction. The nanoflute exhibited high current density with low onset potential value in both OER and HER. The overpotential value at 10 mAcm−2 was observed to be 310 mV with onset potential of 1.43 V in case of OER while the overpotential value for HER was measured to be 282 mV. The nanocatalyst was found to be stable upto 10 h with minimal increment in the overpotential value. The Tafel plot value of 127 mVdec−1 in OER and 131 mVdec−1 in HER also signified for the high efficacy of the catalyst towards splitting of water molecules under high basic condition. The same material was also used as catalyst for reduction of various nitro‐arenes in isopropanol with 0.25 M KOH. The liberation of hydrogen via the oxidation of isopropanol was supposed to be responsible for reduction of nitro‐arenes. The ability of the catalyst to oxidize isopropanol was substantiated from electrochemical studies.

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“…In addition, the presence of hydrophobic and hydrophilic motifs as well as secondary structures can lead to stronger interactions between peptide and nucleated metal nanocomposite, which play important roles in determining the final structure of the formed MNMs [71] . Herein, we present an overview of the recent literature in using peptides for preparing MNMs [41,72,73] …”

Section: Bio‐templates For the Synthesis Of Mnmsmentioning

confidence: 99%

Recent Advances in Bio‐Templated Metallic Nanomaterial Synthesis and Electrocatalytic Applications

et al. 2020

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Developing metallic nanocatalysts with high reaction activity, selectivity and practical durability is a promising and active subfield in electrocatalysis. In the classical “bottom‐up” approach to synthesize stable nanomaterials by chemical reduction, stabilizing additives such as polymers or organic surfactants must be present to cap the nanoparticle to prevent material bulk aggregation. In recent years, biological systems have emerged as green alternatives to support the uncoated inorganic components. One key advantage of biological templates is their inherent ability to produce nanostructures with controllable composition, facet, size and morphology under ecologically friendly synthetic conditions, which are difficult to achieve with traditional inorganic synthesis. In addition, through genetic engineering or bioconjugation, bio‐templates can provide numerous possibilities for surface functionalization to incorporate specific binding sites for the target metals. Therefore, in bio‐templated systems, the electrocatalytic performance of the formed nanocatalyst can be tuned by precisely controlling the material surface chemistry. With controlled improvements in size, morphology, facet exposure, surface area and electron conductivity, bio‐inspired nanomaterials often exhibit enhanced catalytic activity towards electrode reactions. In this Review, recent research developments are presented in bio‐approaches for metallic nanomaterial synthesis and their applications in electrocatalysis for sustainable energy storage and conversion systems.

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Peptide templated AuPt alloyed nanoparticles as highly efficient bi-functional electrocatalysts for both oxygen reduction reaction and hydrogen evolution reaction

Cited by 44 publications

References 57 publications

Oxygen Reduction Reaction and Hydrogen Evolution Reaction Catalyzed by Pd–Ru Nanoparticles Encapsulated in Porous Carbon Nanosheets

Oxygen Reduction Reaction and Hydrogen Evolution Reaction Catalyzed by Pd–Ru Nanoparticles Encapsulated in Porous Carbon Nanosheets

Self‐Assembled Monolayer Stabilized Gold‐Vanadate Nanoflute for Water Splitting Reactions

Recent Advances in Bio‐Templated Metallic Nanomaterial Synthesis and Electrocatalytic Applications

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