2019
DOI: 10.1021/acsaem.9b01644
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Electrochemically Aged Ni Electrodes Supporting NiFe2O4Nanoparticles for the Oxygen Evolution Reaction

Abstract: The preparation and screening of nanoparticle (NP) electrocatalysts for improved electrocatalytic oxygen evolution reactions (OER) will require a better understanding and optimization of the interactions between NPs and their support. First-row transition metals are used extensively as electrocatalysts in electrochemical energy storage and conversion systems. These electrocatalysts undergo transformations in their phase and surface morphology, which are induced by oxidizing potentials in the alkaline medium. A… Show more

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Cited by 13 publications
(24 citation statements)
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“…The three-electrode setup consisted of a Hg/HgO reference electrode, and a graphite rod (same as previously mentioned) as the counter electrode. A reversible hydrogen electrode (RHE) was used to calibrate the Hg/HgO reference electrode, which indicated a potential offset of 0.923 V. 30 The working electrode was held in a vertical orientation. A PTFE holder protected the sides of the working electrode such that only the microstructured surfaces were exposed to the electrolyte.…”
Section: Introductionmentioning
confidence: 99%
“…The three-electrode setup consisted of a Hg/HgO reference electrode, and a graphite rod (same as previously mentioned) as the counter electrode. A reversible hydrogen electrode (RHE) was used to calibrate the Hg/HgO reference electrode, which indicated a potential offset of 0.923 V. 30 The working electrode was held in a vertical orientation. A PTFE holder protected the sides of the working electrode such that only the microstructured surfaces were exposed to the electrolyte.…”
Section: Introductionmentioning
confidence: 99%
“…The increased number of active sites and shortened charge carrier pathways make them attractive for surface-depending processes like the electrocatalytic water splitting. [26,27] NiFe 2 O 4 nanoparticles with different morphological characteristics can be prepared by manifold preparation techniques: for example, Zhou et al prepared NiFe 2 O 4 nanoparticles with tuneable sizes of 10-120 nm via a low temperature hydrothermal method, [28] whereas Wang et al chose a solvothermal approach in ethylene glycol producing NiFe 2 O 4 nanoparticles with adjustable sizes of 7-200 nm. [29] NiFe 2 O 4 nanoparticles with sizes of 8-28 nm are further available using co-precipitation methods, which is shown by Maaz et al [30] Among the various preparation techniques, the applied microwave-assisted method offers an efficient and controlled heating, shortened reaction times, reproducibility, and improved yields.…”
Section: Introductionmentioning
confidence: 99%
“…Further, preparation of nanoparticular materials enables high surface‐to‐volume ratios. The increased number of active sites and shortened charge carrier pathways make them attractive for surface‐depending processes like the electrocatalytic water splitting [26,27] …”
Section: Introductionmentioning
confidence: 99%
“…Fossil fuel depletion and its detrimental global impact on the environment are the greatest concerns these days. To solve these issues, numerous research groups have carried out comprehensive research on renewable energy sources. As renewable energy, hydrogen is the most appropriable and clean energy source to deliver high energy density and zero environmental emissions. The best option to generate hydrogen is by electrochemical water splitting where a lot of research has been pursued in recent years. Nevertheless, due to the slow kinetics, the oxygen evolution reaction (OER) at the electrode surface is not very effective and as a result acquires high overpotential. , Works have been devoted to carry out OER at low overpotential by tuning its electronic and morphological properties .…”
Section: Introductionmentioning
confidence: 99%
“…The first doublet peak located at 710.7 and 724.2 eV and the second doublet peak located at 713.8 and 726.9 eV (Figure5d) are attributed to the binding energies of Fe 2p 3/2 and Fe 2p 1/2 of Fe 2+ and Fe 3+ , respectively. The coexistence of Fe 2+ and Fe 3+ and the presumed Fe 3+ satellite peak located at 718.7 eV indicate the binding energy of Fe with Ni and Co 5. Further, the O 1s spectrum (Figure5e) shows peaks at 529.4, 530.4 531.3, and 533.0 eV corresponding to the lattice oxygen in the spinel system of Ni/Co−Fe−O 14.…”
mentioning
confidence: 96%