Electronic-structure study of the NiGa and the NiIn intermetallic compounds using X-ray photoemission spectroscopy

Hsu, L. S.; Alavi, B.; Shuh, David K.; Williams, R. Stanley

doi:10.1016/0022-3697(94)90226-7

Cited by 59 publications

(4 citation statements)

References 53 publications

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“…The line centered at 856.05 ± 0.1 eV could either be due to Ni 2 O 3 or Ni(OH) 2 and a shake-up satellite peak at 861.26 ± 0.1 eV are within the reported literature values [44,45]. A small peak at BE 858.66 ± 0.1 eV can be denoted as the peak due to the alloying of Ni with secondary metal [46]. Five peaks are fitted for Co 2p 3/2 , where the main BE at 781.39 ± 0.1 eV and its ratio with corresponding satellite peak centered at 786.68 ± 0.1 eV indicate a Co 3+ oxidation state and/or hydroxide form of Co [47,48].…”

Section: Physical Characterization Of the Co3o4 Orr Catalystsupporting

confidence: 83%

Platinum and Platinum Group Metal-Free Catalysts for Anion Exchange Membrane Fuel Cells

et al. 2020

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The development of active hydrogen oxidation reaction (HOR) and oxygen reduction reaction (ORR) catalysts for use in anion exchange membrane fuel cells (AEMFCs), which are free from platinum group metals (PGMs), is expected to bring this technology one step closer to commercial applications. This paper reports our recent progress developing HOR Pt-free and PGM-free catalysts (Pd/CeO2 and NiCo/C, respectively), and ORR PGM-free Co3O4 for AEMFCs. The catalysts were prepared by different synthesis techniques and characterized by both physical-chemical and electrochemical methods. A hydrothermally synthesized Co3O4 + C composite ORR catalyst used in combination with Pt/C as HOR catalyst shows good H2/O2 AEMFC performance (peak power density of ~388 mW cm−2), while the same catalyst coupled with our flame spray pyrolysis synthesised Pd/CeO2 anode catalysts reaches peak power densities of ~309 mW cm−2. Changing the anode to nanostructured NiCo/C catalyst, the performance is significantly reduced. This study confirms previous conclusions, that is indeed possible to develop high performing AEMFCs free from Pt; however, the challenge to achieve completely PGM-free AEMFCs still remains.

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Section: Physical Characterization Of the Co3o4 Orr Catalystsupporting

confidence: 83%

Platinum and Platinum Group Metal-Free Catalysts for Anion Exchange Membrane Fuel Cells

et al. 2020

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“…The main satellite peaks at 857.2 and 876.7 eV are generally caused by multi-electron excitation [31]. According to these “shake-up” peaks, four separated peaks, located at 852.4, 857.2, 870.0 and 873.8 eV, represent metallic Ni (2p3/2), NiO (2p3/2), metallic Ni (2p1/2) and NiO (2p1/2), respectively [32,33]. The as-synthesized Ni/NiO-Nafion-rGO nanocomposite would greatly affect the electrochemical properties of modified SPEs in alkaline medium.…”

Section: Resultsmentioning

confidence: 99%

Nonenzymatic Glucose Sensor Based on In Situ Reduction of Ni/NiO-Graphene Nanocomposite

Zhang

Liao

et al. 2016

Sensors

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Ni/NiO nanoflower modified reduced graphene oxide (rGO) nanocomposite (Ni/NiO-rGO) was introduced to screen printed electrode (SPE) for the construction of a nonenzymatic electrochemical glucose biosensor. The Ni/NiO-rGO nanocomposite was synthesized by an in situ reduction process. Graphene oxide (GO) hybrid Nafion sheets first chemical adsorbed Ni ions and assembled on the SPE. Subsequently, GO and Ni ions were reduced by hydrazine hydrate. The electrochemical properties of such a Ni/NiO-rGO modified SPE were carefully investigated. It showed a high activity for electrocatalytic oxidation of glucose in alkaline medium. The proposed nonenzymatic sensor can be utilized for quantification of glucose with a wide linear range from 29.9 μM to 6.44 mM (R = 0.9937) with a low detection limit of 1.8 μM (S/N = 3) and a high sensitivity of 1997 μA/mM∙cm−2. It also exhibited good reproducibility as well as high selectivity.

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“…The Ni 2p XPS peaks of NiMoO 4 at 855.5 and 861.4 eV match well with the Ni 2+ 2p 3/2 and its corresponding satellite peaks, [ 17 ] while that of Ni 4 Mo/MoO 2 ‐550 present four peaks at 852.8, 855.6 and 857.4, 861.8 eV, corresponding to Ni 0 2p 3/2 , Ni 2+ 2p 3/2 and satellite peaks. [ 15a,18 ] The presence of metallic Ni 0 implies the partial reduction of the Ni 2+ to Ni 0 owing to the H 2 treatment. As for the high‐resolution Mo 3d XPS pattern of NiMoO 4 (Figure 1i), the peaks located at 232.2 and 235.3 eV, belonged to Mo 6+ 3d 5/2 and Mo 6+ 3d 3/2 .…”

Section: Resultsmentioning

confidence: 99%

Efficient Self‐Powered Overall Water Splitting by Ni₄Mo/MoO₂ Heterogeneous Nanorods Trifunctional Electrocatalysts

et al. 2023

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The exploration of cost-effective multifunctional electrodes with high activity toward energy storage and conversion systems, such as self-powered alkaline water electrolysis, is very meaningful, although studies remain quite limited. Herein, a heterogeneous nickel-molybdenum (NiMo)-based electrode is fabricated for the first time as a trifunctional electrode for asymmetric supercapacitor (ASC), hydrogen evolution reaction, and oxygen evolution reaction. The trifunctional electrode consists of Ni 4 Mo and MoO 2 (denoted Ni 4 Mo/MoO 2 ) with hierarchical nanorod heterostructure and abundant heterogeneous nanointerfaces creating sufficient active sites and efficient charge transfer for achieving high performance self-power electrochemical devices. The ASC consists of the as-prepared Ni 4 Mo/MoO 2 positive electrode, showing a broad potential window of 1.6 V, and a maximum energy density of 115.6 Wh kg −1 , while the alkaline overall water splitting (OWS) assembled using the as-prepared Ni 4 Mo/MoO 2 as bifunctional catalysts only requires a low cell voltage of 1.48 V to achieve a current density of 10 mA cm −2 in aqueous alkaline electrolyte. Finally, by integrating the Ni 4 Mo/MoO 2 -based ASC and OWS devices, an aqueous self-powered OWS is assembled, which self-power the OWS to generate hydrogen gas and oxygen gas, verifying great potential of the as-prepared Ni 4 Mo/MoO 2 for sustainable and renewable energy storage and conversion system.

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Electronic-structure study of the NiGa and the NiIn intermetallic compounds using X-ray photoemission spectroscopy

Cited by 59 publications

References 53 publications

Platinum and Platinum Group Metal-Free Catalysts for Anion Exchange Membrane Fuel Cells

Platinum and Platinum Group Metal-Free Catalysts for Anion Exchange Membrane Fuel Cells

Nonenzymatic Glucose Sensor Based on In Situ Reduction of Ni/NiO-Graphene Nanocomposite

Efficient Self‐Powered Overall Water Splitting by Ni₄Mo/MoO₂ Heterogeneous Nanorods Trifunctional Electrocatalysts

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Electronic-structure study of the NiGa and the NiIn intermetallic compounds using X-ray photoemission spectroscopy

Cited by 59 publications

References 53 publications

Platinum and Platinum Group Metal-Free Catalysts for Anion Exchange Membrane Fuel Cells

Platinum and Platinum Group Metal-Free Catalysts for Anion Exchange Membrane Fuel Cells

Nonenzymatic Glucose Sensor Based on In Situ Reduction of Ni/NiO-Graphene Nanocomposite

Efficient Self‐Powered Overall Water Splitting by Ni4Mo/MoO2 Heterogeneous Nanorods Trifunctional Electrocatalysts

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Product

Resources

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Efficient Self‐Powered Overall Water Splitting by Ni₄Mo/MoO₂ Heterogeneous Nanorods Trifunctional Electrocatalysts