In-situ probing polarization-induced stability of single-atom alloy electrocatalysts in metal-air battery via synchrotron-based X-ray diffraction

Balamurugan, Chandran; Kim, Young Yong; Jo, Yong-Ryun; Cho, Kyusang; Park, Byoungwook; Kim, Woochul; Lim, Namsoo; Pak, Yusin; Kim, Hyeonghun; Lee, Hyeonryul; Chae, Keun Hwa; Shim, Ji Hoon; Lee, Changhoon; Kwon, Sooncheol

doi:10.1016/j.apcatb.2024.124072

Cited by 4 publications

References 101 publications

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Effective Corrosion‐Resistant Single‐Atom Alloy Catalyst on HfO₂‐Passivated BiVO₄ Photoanode for Durable (≈800 h) Solar Water Oxidation

Arunachalam,

Lee,

Zhu

et al. 2024

Advanced Energy Materials

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Green hydrogen (H2) production from solar water splitting necessitates photoelectrodes with superior photoelectrochemical (PEC) activity and durability. However, surface defects and photocorrosion instability—especially at high potentials—limit PEC performance and stability. Herein, the prototypical bismuth vanadate (BiVO4) photoanode is used to demonstrate a holistic approach to improve photocurrent density and long‐term stability. In this approach, high surface‐area nanostructuring of BiVO4 is combined with barium (Ba) doping with semi‐crystalline hafnium oxide (HfO2) surface passivation and single‐atom nickel platinum (NiPt) catalysts. The introduction of Ba2+ ions into BiVO4 increases the concentration of conductive V4+ ions or the ratio of V4+ ions to oxygen vacancies, avoiding V5+ dissolution during water oxidation. The semi‐crystalline HfO2, which serves as a passivation layer, prevents BiVO4 photocorrosion by suppressing harmful chemical reactions when holes are transferred to the electrolyte. The synergistic use of isolated single‐atom and Ni‐Pt coordination improves charge transfer at the photoanode/electrolyte interface, leading to enhanced PEC kinetics and stability. As a result, a photoelectrode is demonstrated with ≈6.5 mA cm−2 at 1.23 V versus a reversible hydrogen electrode (RHE) and continuous operation for 800 h with a negligible degradation rate. This work provides a promising approach to improve photoanodes for PEC H2 production.

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Effective Corrosion‐Resistant Single‐Atom Alloy Catalyst on HfO₂‐Passivated BiVO₄ Photoanode for Durable (≈800 h) Solar Water Oxidation

Arunachalam,

Lee,

Zhu

et al. 2024

Advanced Energy Materials

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Cooperative effects between NiMo alloy enable highly efficient for all-pH-value and alkaline seawater hydrogen evolution

Meng,

Shang,

Liu

et al. 2024

Applied Catalysis B: Environment and Energy

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Exploring innovative trends and advancements in rechargeable zinc-air batteries

Ahmed,

Ali,

Asif

et al. 2024

Inorganic Chemistry Communications

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In-situ probing polarization-induced stability of single-atom alloy electrocatalysts in metal-air battery via synchrotron-based X-ray diffraction

Cited by 4 publications

References 101 publications

Effective Corrosion‐Resistant Single‐Atom Alloy Catalyst on HfO₂‐Passivated BiVO₄ Photoanode for Durable (≈800 h) Solar Water Oxidation

Effective Corrosion‐Resistant Single‐Atom Alloy Catalyst on HfO₂‐Passivated BiVO₄ Photoanode for Durable (≈800 h) Solar Water Oxidation

Cooperative effects between NiMo alloy enable highly efficient for all-pH-value and alkaline seawater hydrogen evolution

Exploring innovative trends and advancements in rechargeable zinc-air batteries

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In-situ probing polarization-induced stability of single-atom alloy electrocatalysts in metal-air battery via synchrotron-based X-ray diffraction

Cited by 4 publications

References 101 publications

Effective Corrosion‐Resistant Single‐Atom Alloy Catalyst on HfO2‐Passivated BiVO4 Photoanode for Durable (≈800 h) Solar Water Oxidation

Effective Corrosion‐Resistant Single‐Atom Alloy Catalyst on HfO2‐Passivated BiVO4 Photoanode for Durable (≈800 h) Solar Water Oxidation

Cooperative effects between NiMo alloy enable highly efficient for all-pH-value and alkaline seawater hydrogen evolution

Exploring innovative trends and advancements in rechargeable zinc-air batteries

Contact Info

Product

Resources

About

Effective Corrosion‐Resistant Single‐Atom Alloy Catalyst on HfO₂‐Passivated BiVO₄ Photoanode for Durable (≈800 h) Solar Water Oxidation

Effective Corrosion‐Resistant Single‐Atom Alloy Catalyst on HfO₂‐Passivated BiVO₄ Photoanode for Durable (≈800 h) Solar Water Oxidation