Early transition metal oxides with oxygen vacancies as new thermodynamically stable materials for electrocatalysis

Wu, Zhe; Shi, Yue; Wei, Yingying; Chen, Zilong; Zhan, Tianrong; Lai, Jianping; Wang, Lei

doi:10.1016/j.apcatb.2024.124368

Applied Catalysis B: Environment and Energy

2024

DOI: 10.1016/j.apcatb.2024.124368

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Early transition metal oxides with oxygen vacancies as new thermodynamically stable materials for electrocatalysis

Zhe Wu,

Yue Shi,

Yingying Wei

et al.

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2024

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Cited by 2 publications

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Nanocatalysis in cathode pre-lithiation for lithium-ion batteries: progress and challenges

Niu,

Qiu,

Chen

et al. 2024

Nanoscale

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Nanocatalysis in cathode pre-lithiation for lithium-ion batteries: progress and challenges

Niu,

Qiu,

Chen

et al. 2024

Nanoscale

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Charge Transfer in n-FeO and p-α-Fe2O3 Nanoparticles for Efficient Hydrogen and Oxygen Evolution Reaction

Humayun,

Manivelan,

Prabakar

2024

Nanomaterials

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This study aims to explore the n-FeO and p-α-Fe2O3 semiconductor nanoparticles in hydrogen (HER) and oxygen (OER) evolution reactions and a combined full cell electrocatalyst system to electrolyze the water. We have observed a distinct electrocatalytic performance for both HER and OER by tuning the interplay between iron oxidation states Fe2+ and Fe3+ and utilizing phase-transformed iron oxide nanoparticles (NPs). The Fe2+ rich n-FeO NPs exhibited superior HER performance compared to p-α-Fe2O3 and Fe(OH)x NPs, which is attributed to the enhancement in n-type semiconducting nature under HER potential, facilitating the electron transfer for the reduction in H+ ions. In contrast, p-α-Fe2O3 NPs demonstrated excellent OER activity. An H-cell constructed using n-FeO||p-α-Fe2O3 NPs as cathode and anode achieved a cell voltage of 1.87 V at a current density of 50 mA/cm2. The cell exhibited remarkable stability after 30 h of activation and maintained the high current density of 100 mA/cm2 for 80 h with a negligible increase in cell voltage. This work highlights the semiconducting properties of n-FeO and p-α-Fe2O3 for the electrochemical water splitting system using the band bending phenomenon under the applied potential.

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Early transition metal oxides with oxygen vacancies as new thermodynamically stable materials for electrocatalysis

Cited by 2 publications

References 47 publications

Nanocatalysis in cathode pre-lithiation for lithium-ion batteries: progress and challenges

Nanocatalysis in cathode pre-lithiation for lithium-ion batteries: progress and challenges

Charge Transfer in n-FeO and p-α-Fe2O3 Nanoparticles for Efficient Hydrogen and Oxygen Evolution Reaction

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