Breaking OER and CER scaling relations via strain and its relaxation in RuO2 (101)

Adiga, Prajwal; Nunn, William; Wong, Cindy; Manjeshwar, Anusha Kamath; Nair, S.K.; Jalan, Bharat; Stoerzinger, Kelsey A.

doi:10.1016/j.mtener.2022.101087

Cited by 15 publications

(9 citation statements)

References 54 publications

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“…On the other hand, under tensile strain AEM activity decreases and LOM activity improves. This theoretical finding appears to be consistent with the experimental observation of pH dependence for unstrained RuO 2 suggesting some contribution of LOM and the lack of thereof in strained RuO 2 suggesting that the major contribution comes from the AEM mechanism [38] …”

Section: Resultssupporting

confidence: 89%

“…This theoretical finding appears to be consistent with the experimental observation of pH dependence for unstrained RuO 2 suggesting some contribution of LOM and the lack of thereof in strained RuO 2 suggesting that the major contribution comes from the AEM mechanism. [38] We further find that there is a clear correlation between the shifts of the O-2p band center as a function of applied strain for the O cus and O lat sites and OER activity (see Figure 3). Specifically, we observe that with increasing strain, the O cus -2p band centers become lower in energy indicating that the O cus atoms should be less OER active.…”

Section: Resultsmentioning

confidence: 53%

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Strain‐Dependent Activity‐Stability Relations in RuO₂ and IrO₂ Oxygen Evolution Catalysts

Chaudhary,

Zagalskaya,

Over

et al. 2023

ChemElectroChem

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Strain engineering is an effective strategy in modulating activity of electrocatalysts, but the effect of strain on electrochemical stability of catalysts remains poorly understood. In this work, we combine ab initio thermodynamics and molecular dynamics simulations to examine the role of compressive and tensile strain in the interplay between activity and stability of metal oxides considering RuO and IrO as exemplary catalysts. We reveal that although compressive strain leads to improved activity via the adsorbate‐evolving mechanism of the oxygen evolution reaction, even small strains should substantially destabilize these catalysts promoting dissolution of transition metals. In contrast, our results show that the metal oxides requiring tensile strain to promote their catalytic activity may also benefit from enhanced stability. Importantly, we also find that the detrimental effect of strain on electrochemical stability of atomically flat surfaces could be even greater than that of surface defects.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 53%

Strain‐Dependent Activity‐Stability Relations in RuO₂ and IrO₂ Oxygen Evolution Catalysts

Chaudhary,

Zagalskaya,

Over

et al. 2023

ChemElectroChem

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“…In particular, the peaks at binding energies (BEs) of 462.7 and 484.7 eV are assigned to Ru(IV), while the two peaks at 465.2 and 487.1 eV are ascribed to Ru(III). 37 Interestingly, the binding energy of the Li-doped RuO 2 sample exhibited a slight XPS peak shift toward the lower energy direction in comparison with that of pristine RuO 2 , reflecting the change in electronic configuration and the existence of electronic interactions between each element after Li doping (Fig. 2b).…”

Section: Resultsmentioning

confidence: 94%

Alkali metal doped ruthenium dioxide nanosheets with lattice distortion as highly active oxygen evolution electrocatalysts in acidic media

et al. 2023

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“…products at the RuOx surface as a function of J was investigated (35). The selectivity towards iron plating, ηFe, was >94 % for J ≤ 200 mA cm -2 (Figure 4A) and ηFe decreased to 87% at 300 mA cm -2 .…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Chlor-Iron Process for Iron Production from Iron Oxide and Seawater

Noble¹,

Moutarlier²,

Kempler³

2023

Preprint

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The iron and steel industry accounts for ~ 8% of global greenhouse gas emissions. Electrochemical reduction of iron ore to metal for electric arc furnaces can enable sustainable steel production, but existing electrochemical processes require expensive capital or electrolytes. We report a low-temperature, electrochemical cell that consumes low-cost and abundant iron oxide and seawater, while co-producing NaOH and Cl2 with industrially relevant current densities reaching 300 mA cm-2 and current efficiencies >90 %. Freestanding films of phase-pure iron were formed after 4 h of continuous, stable electrolysis. The process can lead to levelized costs of iron that are competitive with iron produced in fossil-fuel-powered blast furnaces (< $500 per metric tonne) and the co-produced NaOH can be used for CO2 mineralization from the air or ocean, creating a net negative-emission process.

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Breaking OER and CER scaling relations via strain and its relaxation in RuO2 (101)

Cited by 15 publications

References 54 publications

Strain‐Dependent Activity‐Stability Relations in RuO₂ and IrO₂ Oxygen Evolution Catalysts

Strain‐Dependent Activity‐Stability Relations in RuO₂ and IrO₂ Oxygen Evolution Catalysts

Alkali metal doped ruthenium dioxide nanosheets with lattice distortion as highly active oxygen evolution electrocatalysts in acidic media

Electrochemical Chlor-Iron Process for Iron Production from Iron Oxide and Seawater

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Breaking OER and CER scaling relations via strain and its relaxation in RuO2 (101)

Cited by 15 publications

References 54 publications

Strain‐Dependent Activity‐Stability Relations in RuO2 and IrO2 Oxygen Evolution Catalysts

Strain‐Dependent Activity‐Stability Relations in RuO2 and IrO2 Oxygen Evolution Catalysts

Alkali metal doped ruthenium dioxide nanosheets with lattice distortion as highly active oxygen evolution electrocatalysts in acidic media

Electrochemical Chlor-Iron Process for Iron Production from Iron Oxide and Seawater

Contact Info

Product

Resources

About

Strain‐Dependent Activity‐Stability Relations in RuO₂ and IrO₂ Oxygen Evolution Catalysts

Strain‐Dependent Activity‐Stability Relations in RuO₂ and IrO₂ Oxygen Evolution Catalysts