Oxygen evolution electrocatalysis using mixed metal oxides under acidic conditions: Challenges and opportunities

Gu, Xiang-Kui; Camayang, John Carl A.; Samira, Samji; Nikolla, Eranda

doi:10.1016/j.jcat.2020.05.008

Cited by 71 publications

(45 citation statements)

References 83 publications

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“…Two well-accepted possible catalytic mechanisms for OER have been proposed, adsorbate evolution mechanism (AEM) and lattice oxygen participation mechanism (LOM). [33][34][35][36] Typically for AEM, the formation of absorbed *OH intermediate, its transformation to *O, active *OOH formation and the final oxygen molecule release are the key successive steps. Furthermore, no matter what mechanism follows, the catalyst structures especially for local oxygen species structure are very crucial for a complete four-electron involved catalytic cycle.…”

Section: Application Of Ceo 2 -Based Electrocatalysts In Oermentioning

confidence: 99%

“…To circumvent these obstacles, opening up new opportunities to develop advanced electrocatalysts is very promising. Two well‐accepted possible catalytic mechanisms for OER have been proposed, adsorbate evolution mechanism (AEM) and lattice oxygen participation mechanism (LOM) [33–36] . Typically for AEM, the formation of absorbed *OH intermediate, its transformation to *O, active *OOH formation and the final oxygen molecule release are the key successive steps.…”

Section: Application Of Ceo2‐based Electrocatalysts In Oermentioning

confidence: 99%

See 1 more Smart Citation

Recent Advances of CeO₂‐Based Electrocatalysts for Oxygen and Hydrogen Evolution as well as Nitrogen Reduction

2021

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wards the oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and nitrogen reduction reaction (NRR) are summarized. This Review also highlights the key role of CeO 2 and the structural design strategies in the hybrid electrocatalysts, including ion doping, interface and defect engineering, electronic structure optimization, and morphology control for catalytic output enhancement. Lastly, some scientific challenges and perspectives have been proposed, aiming to promote the development of other CeO 2-based hybrids for energy related electrocatalysis.

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Section: Application Of Ceo 2 -Based Electrocatalysts In Oermentioning

confidence: 99%

Section: Application Of Ceo2‐based Electrocatalysts In Oermentioning

confidence: 99%

Recent Advances of CeO₂‐Based Electrocatalysts for Oxygen and Hydrogen Evolution as well as Nitrogen Reduction

2021

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“…For example, industrial electrolytic water generally maintains the external voltage at 1.8~2.0 V [16]. Typically, the descriptor of overpotential is used to show the difference between the thermodynamic potential and the practical potential required to drive the electrochemical reaction [24]. The overpotential mainly comes from the electrochemical polarization on the anode side (η a ) and cathode side (η c ) and the ohmic polarization caused by other resistors (η other ) [25].…”

Section: H O L → O + 4h + 4ementioning

confidence: 99%

“…In the case of the OER in acid media, two possible mechanisms built on consecutive proton and electron transfers during the catalytic cycle, known as the adsorbate evolution mechanism (AEM) and the lattice oxygen participation mechanism (LOM), have been widely accepted [24,26,54,55] (Figure 2). For the reaction path based on the AEM, a water molecule first adsorbs on a surface metal cation and decomposes into a proton (H + ) to form HO*, which further dissociates the second proton to form O* in the second step.…”

Section: Mechanisms For the Oer In Acidic Mediamentioning

confidence: 99%

Electrocatalysis for the Oxygen Evolution Reaction in Acidic Media: Progress and Challenges

Wang

et al. 2021

Applied Sciences

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The oxygen evolution reaction (OER) is the efficiency-determining half-reaction process of high-demand, electricity-driven water splitting due to its sluggish four-electron transfer reaction. Tremendous effects on developing OER catalysts with high activity and strong acid-tolerance at high oxidation potentials have been made for proton-conducting polymer electrolyte membrane water electrolysis (PEMWE), which is one of the most promising future hydrogen-fuel-generating technologies. This review presents recent progress in understanding OER mechanisms in PEMWE, including the adsorbate evolution mechanism (AEM) and the lattice-oxygen-mediated mechanism (LOM). We further summarize the latest strategies to improve catalytic performance, such as surface/interface modification, catalytic site coordination construction, and electronic structure regulation of catalytic centers. Finally, challenges and prospective solutions for improving OER performance are proposed.

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“…The reduction of H + ions occurs at the cathode (2H + (aq) + 2e - H2 (g)) and the oxidation of water takes place at the anode (2H2O(l)  O2(g) + 4H + (aq) + 4e -) 5,20 . The thermodynamic voltage of water splitting is 1.23 V at 25 °C and 1 atm which corresponds to an energy input of G = 237.1 kJ mol - 1 12,21 , but much higher potentials-referred as overpotential-are required to initiate practical water splitting 22,23 .…”

Section: Introductionmentioning

confidence: 99%

Metal Doped Layered MgB2 Nanoparticles as Novel Electrocatalysts for Water Splitting

Sadeghi

Peighambardoust

Khatamian

et al. 2020

Preprint

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Growing environmental problems along with the galloping rate of population growth have raised an unprecedented challenge to look for an ever-lasting alternative source of energy for fossil fuels. The eternal quest for sustainable energy production strategies has culminated in the electrocatalytic water splitting process integrated with renewable energy resources. The successful accomplishment of this process is thoroughly subject to highly efficient, earth-abundant, and cost-effective electrocatalysts to drive the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), preferably, in the same electrolyte. The present contribution has been dedicated to studying the synthesis, characterization, and electrochemical properties of newfangled electrocatalysts with the formal composition of Mg1-xTmxB2 (x = 0.025, 0.05, and 0.1; Tm (transition metal) = Fe and Co) primarily in HER as well as OER under 1 M KOH medium. The electrochemical tests revealed that among all the metal-doped MgB2 catalysts, Mg0.95Co0.05B2 has the best HER performance showing an overpotential of 470 mV at -10 mA cm-2 and a Tafel slope of 80 mV dec-1 on account of its high purity and fast electron transport. Further investigation shed some light on the fact that Fe concentration and overpotential for HER have adverse relation meaning that the highest amount of Fe doping (x = 0.1) displayed the lowest overpotential. This contribution introduces not only highly competent electrocatalysts composed of low-cost precursors for the water-splitting process but also a facile scalable method for the assembly of highly porous electrodes paving the way for further stunning developments in the field.

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Oxygen evolution electrocatalysis using mixed metal oxides under acidic conditions: Challenges and opportunities

Cited by 71 publications

References 83 publications

Recent Advances of CeO₂‐Based Electrocatalysts for Oxygen and Hydrogen Evolution as well as Nitrogen Reduction

Recent Advances of CeO₂‐Based Electrocatalysts for Oxygen and Hydrogen Evolution as well as Nitrogen Reduction

Electrocatalysis for the Oxygen Evolution Reaction in Acidic Media: Progress and Challenges

Metal Doped Layered MgB2 Nanoparticles as Novel Electrocatalysts for Water Splitting

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Oxygen evolution electrocatalysis using mixed metal oxides under acidic conditions: Challenges and opportunities

Cited by 71 publications

References 83 publications

Recent Advances of CeO2‐Based Electrocatalysts for Oxygen and Hydrogen Evolution as well as Nitrogen Reduction

Recent Advances of CeO2‐Based Electrocatalysts for Oxygen and Hydrogen Evolution as well as Nitrogen Reduction

Electrocatalysis for the Oxygen Evolution Reaction in Acidic Media: Progress and Challenges

Metal Doped Layered MgB2 Nanoparticles as Novel Electrocatalysts for Water Splitting

Contact Info

Product

Resources

About

Recent Advances of CeO₂‐Based Electrocatalysts for Oxygen and Hydrogen Evolution as well as Nitrogen Reduction

Recent Advances of CeO₂‐Based Electrocatalysts for Oxygen and Hydrogen Evolution as well as Nitrogen Reduction