Crystal facet-dependent activity of α-Mn2O3 for oxygen reduction and oxygen evolution reactions

Wang, Ying; Hu, Tianjun; Chen, Yan; Yuan, Hongjie; Qiao, Yanting

doi:10.1016/j.ijhydene.2020.06.085

Cited by 33 publications

(3 citation statements)

References 37 publications

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“…196 For manganese oxides with various crystal structures of MnO, β-MnO 2 , and α-Mn 2 O 3 , the correlation between crystal facets and activity has been revealed. [197][198][199] For example, Kakizaki et al identified that the stable Mn 3+ intermediate affects OER activity in rutile β-MnO 2 . 199 In the {101} facet, Mn 2+ and Mn 4+ generate charge-balanced Mn 3+ states stabilizing the formation of Mn 3+ intermediate, which serves as a ratelimiting step of OER (Fig.…”

Section: Pec Water Splittingmentioning

confidence: 99%

Crystal facet and phase engineering for advanced water splitting

et al. 2022

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Section: Pec Water Splittingmentioning

confidence: 99%

Crystal facet and phase engineering for advanced water splitting

et al. 2022

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“…The small shoulder peak for 15%Ni/Ce0.8Sm0.1Zr0.1O2 represents the reduction of highly-dispersed Ni on the support. The 15%Ni/Ce0.8Sm0.1Zr0.1O2 exhibit two isolated peaks near 400 and 650℃, which represent the reduction reactions of Fe2O3 → Fe3O4 and Fe3O4 → Fe, respectively [13] . The peaks are much wider than Ni-loaded material, indicating the high dispersion of Fe oxidizes.…”

Section: Resultsmentioning

confidence: 99%

Effect of cell sintering temperature on the performance of non-noble metal loaded cerium oxide SOEC anodes

Li,

Huang,

Wang

et al. 2024

J. Phys.: Conf. Ser.

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Introducing methane oxidation reaction into the anode of the high-temperature solid oxide electrolysis cell (SOEC) can reduce the power consumption for water electrolysis. Compared to the traditional conditions of methane oxidation, the methane oxidation catalyst sintered at the SOEC anode, which is closely related to the cell sintering process. This study uses non-noble metals as active sites for methane oxidation, zirconia, and samarium oxides doped ceria as catalyst support and oxygen ion conductors. The effects of anode sintering temperature on the electrochemical performance of SOEC assisted by methane oxidation were investigated. The results indicate that the high-temperature sintering process promotes the performance of the SOEC anode with Ni as the active site, while high temperature harms the performance of the Co-loaded anode. The sintering temperature exhibits a poor effect on the Fe-loaded anode. The Ni exhibits good enhancement of methane oxidation on reducing the electrolysis voltage of SOEC, while Co only exhibits methane oxidation assistance at low-temperature sintering. Differently, Fe has almost no obvious methane oxidation assistance for SOEC, which mainly represents good oxygen evolution performance.

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“…For the design of efficient transition metal-based (e.g., Mn, Co, Ni, and Fe) bifunctional catalysts, the precise control of the exposed preferential crystal planes and appropriate surface energies is one of the most promising routes to improve their catalytic selectivity and activity (Figure 12). [140][141][142][143][144] Their unique facet-controlled geometry with different low-index facets (e.g., {111}, {110}, and/or {100}) in different proportions significantly determines their catalytic activity. The importance of the exposed lattice facets for the oxygen electrocatalytic activity has been widely investigated in the Mn-based nanocrystals.…”

Section: Crystallographic Structure Controlmentioning

confidence: 99%

Defect Electrocatalysts and Alkaline Electrolyte Membranes in Solid‐State Zinc–Air Batteries: Recent Advances, Challenges, and Future Perspectives

Zhang

et al. 2020

Small Methods

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Rechargeable zinc–air batteries (ZABs) have attracted much attention due to their promising capability for offering high energy density while maintaining a long operational lifetime. One of the biggest challenges in developing all‐solid‐state ZABs is to design suitable bifunctional air‐electrodes, which can efficiently catalyze the key oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) electrochemical processes. The other one is to develop robust electrolyte membranes with high ionic conductivity and superb water retention capability. In this review, an in‐depth discussion of the challenges, mechanisms, and design strategies for the defect electrocatalyst and the electrolyte membrane in all‐solid‐state ZABs will be offered. In particular, the crucial defect engineering strategies to tune the ORR/OER catalysts are summarized, including direct controllable strategies: 1) atomically dispersed metal sites control, 2) vacancy defects control, and 3) lattice‐strain control, and the indirect strategies: 4) crystallographic structure control and 5) metal–carbon support interaction control. Moreover, the most recent progress in designing electrolyte membranes, including polyvinyl alcohol‐based membranes and gel polymer electrolyte membranes, is presented. Finally, the perspectives are proposed for rational design and fabrication of the desired air electrode and electrolyte membrane to improve the performance and prolong the lifetime of all‐solid‐state ZABs.

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Crystal facet-dependent activity of α-Mn2O3 for oxygen reduction and oxygen evolution reactions

Cited by 33 publications

References 37 publications

Crystal facet and phase engineering for advanced water splitting

Crystal facet and phase engineering for advanced water splitting

Effect of cell sintering temperature on the performance of non-noble metal loaded cerium oxide SOEC anodes

Defect Electrocatalysts and Alkaline Electrolyte Membranes in Solid‐State Zinc–Air Batteries: Recent Advances, Challenges, and Future Perspectives

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