Surface galvanic formation of Co-OH on Birnessite and its catalytic activity for the oxygen evolution reaction

Pu, Yayun; Celorrio, Verónica; Stockmann, Jöerg M.; Sobol, Oded; Sun, Zongzhao; Wu, Wei; Lawrence, Matthew; Radnik, Jörg; Russell, Andrea E.; Hodoroabă, Vasile-Dan; Huang, Limin; Rodríguez, Paramaconi

doi:10.1016/j.jcat.2021.02.025

Cited by 6 publications

(7 citation statements)

References 56 publications

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“…Deconvolution of the C 1s spectrum shows the presence of hydrocarbon, alcohol/ether, carbonyl, and ester depicted by four peaks from low to high binding energy (Figure f). , The consistency observed between core-level Ni 2p 3/2 , Co 2p 3/2 , O 1s, and C 1s spectra enhances the reliability of the peak assignments. The close values of normalM − OH normalM n + and OH − normalM normalO lattice ratios (namely, 0.22 and 0.22, and 0.26 and 0.28 for NiO and NiCo 2 O 4 , respectively, Table ) imply the coherence in terms of hydroxyl-associated adsorbates on the surface . The atomic ratio of Ni Co calculated for NiCo 2 O 4 materials is about 0.58 on the surface, suggesting the stoichiometric formation of nickel cobaltite with a ratio close to 0.50 that agrees with the X-ray diffractogram.…”

Section: Resultsmentioning

confidence: 99%

“…26,36 The consistency observed between core-level Ni 1) imply the coherence in terms of hydroxyl-associated adsorbates on the surface. 37 The atomic ratio of Ni Co calculated for NiCo 2 O 4 materials is about 0.58 on the surface, suggesting the stoichiometric formation of nickel cobaltite with a ratio close to 0.50 that agrees with the X-ray diffractogram.…”

Section: Materials Characterizationmentioning

confidence: 99%

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Selectivity Control of Oxygen Reduction Reaction over Mesoporous Transition Metal Oxide Catalysts for Electrified Purification Technologies

Vagin

Boyd

et al. 2023

ACS Appl. Mater. Interfaces

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Direct electrification of oxygen-associated reactions contributes to large-scale electrical storage and the launch of the green hydrogen economy. The design of the involved catalysts can mitigate the electrical energy losses and improve the control of the reaction products. We evaluate the effect of the interface composition of electrocatalysts on the efficiency and productivity of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), both mechanistically and at device levels. The ORR and OER were benchmarked on mesoporous nickel(II) oxide and nickel cobaltite (NiO and NiCo2O4, respectively) obtained by a facile template-free hydrothermal synthesis. Physicochemical characterization showed that both NiO and NiCo2O4 are mesoporous and have a cubic crystal structure with abundant surface hydroxyl species. NiCo2O4 showed higher electrocatalytic activity in OER and selectivity to water as the terminal product of ORR. On the contrary, ORR over NiO yielded hydroxyl radicals as products of a Fenton-like reaction of H2O2. The product selectivity in ORR was used to construct two electrolyzers for electrified purification of oxygen and generation of hydroxyl radicals.

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Section: Resultsmentioning

confidence: 99%

Section: Materials Characterizationmentioning

confidence: 99%

Selectivity Control of Oxygen Reduction Reaction over Mesoporous Transition Metal Oxide Catalysts for Electrified Purification Technologies

Vagin

Boyd

et al. 2023

ACS Appl. Mater. Interfaces

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“…bonds between different anions (chloride, nitrate and sulfate anions) and Co on the layer of CoO x H y deposited on the K 0.45 MnO 2 (Figure 6b). [62] As a contrast, strongly solvated species, like F − and ClO 4…”

Section: Chemisorption Interactionmentioning

confidence: 99%

“…reported chemical bonds between different anions (chloride, nitrate and sulfate anions) and Co on the layer of CoO x H y deposited on the K 0.45 MnO 2 (Figure 6b ). [ 62 ] As a contrast, strongly solvated species, like F − and ClO 4 − , can only be nonspecifically or weakly adsorbed on the host oxide surface. However, mixing anions with different electronegativity can adjust the properties and strength of chemical bonds, which allows the coexistence of chemical bonds (improve conductivity) and covalent bonds (offer structural stability).…”

Section: Origin Of Anions Adsorbed On the Reconstructed Catalystsmentioning

confidence: 99%

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Progress in Manipulating Dynamic Surface Reconstruction via Anion Modulation for Electrocatalytic Water Oxidation

Ajmal

Zhang

et al. 2023

Advanced Science

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The development of efficient and economical electrocatalysts for oxygen evolution reaction (OER) is of paramount importance for the sustainable production of renewable fuels and energy storage systems; however, the sluggish OER kinetics involving multistep four proton‐coupled electron transfer hampers progress in these systems. Fortunately, surface reconstruction offers promising potential to improve OER catalyst design. Anion modulation plays a crucial role in controlling the extent of surface reconstruction and positively persuading the reconstructed species' performances. This review starts by providing a general explanation of how various types of anions can trigger dynamic surface reconstruction and create different combinations with pre‐catalysts. Next, the influences of anion modulation on manipulating the surface dynamic reconstruction process are discussed based on the in situ advanced characterization techniques. Furthermore, various effects of survived anionic groups in reconstructed species on water oxidation activity are further discussed. Finally, the challenges and prospects for the future development directions of anion modulation for redirecting dynamic surface reconstruction to construct highly efficient and practical catalysts for water oxidation are proposed.

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Strategic design and fabrication of MXenes-Ti3CNCl2@CoS2 core-shell nanostructure for high-efficiency hydrogen evolution

et al. 2022

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Surface galvanic formation of Co-OH on Birnessite and its catalytic activity for the oxygen evolution reaction

Cited by 6 publications

References 56 publications

Selectivity Control of Oxygen Reduction Reaction over Mesoporous Transition Metal Oxide Catalysts for Electrified Purification Technologies

Selectivity Control of Oxygen Reduction Reaction over Mesoporous Transition Metal Oxide Catalysts for Electrified Purification Technologies

Progress in Manipulating Dynamic Surface Reconstruction via Anion Modulation for Electrocatalytic Water Oxidation

Strategic design and fabrication of MXenes-Ti3CNCl2@CoS2 core-shell nanostructure for high-efficiency hydrogen evolution

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