Switchable Acidic Oxygen Evolution Mechanisms on Atomic Skin of Ruthenium Metallene Oxides DOI
Tianyi Gao,

Dongxu Jiao,

Lina Wang

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 25, 2024

RuO2 has been considered as a promising, low-cost, and highly efficient catalyst in the acidic oxygen evolution reaction (OER). However, it suffers from poor stability due to inevitable involvement of lattice mechanism (LOM). Here, we construct unique metallene-based core-skin structure unveil that OER pathway atomic skin can be regulated LOM an adsorbate by altering core species metallene oxides metallenes. This switch is achieved without sacrificing number active sites, enabling Pd@RuO2 metallenes exhibit outstanding activity with low overpotential 189 mV at 10 mA cm–2, which 54 lower than counterpart PdO@RuO2 Additionally, they also robust negligible decay over 100 h 50 outperforming most reported RuO2-based catalysts. Multiple spectroscopic analyses theoretical calculations demonstrate Pd-metallene core, acting electron donor, increases migration energy subsurface atoms optimizes adsorption intermediates on Ru mechanism. Such offers novel way for tuning catalytic behaviors electrocatalysts.

Language: Английский

Advanced In Situ Spectroscopic Techniques for Probing the Acidic Oxygen Evolution Reaction DOI

Shi-Yu Hong,

Ze‐Cheng Yao, Xing Cheng

et al.

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(41), P. 17219 - 17239

Published: Oct. 7, 2024

Proton exchange membrane water electrolysis (PEMWE) is a promising technology for sustainable hydrogen production. However, the anodic oxygen evolution reaction (OER) critical bottleneck restricting power-to-gas efficiency and widespread application of PEMWE devices because harsh acidic oxidative environment causes drastic catalyst structural thus severe dissolution/corrosion as well performance degradation. Currently, lack deep insight identifying real catalytic sites during distinctions mechanisms have hindered development highly active durable OER catalysts PEMWE. Therefore, elucidating OER-induced structure understanding underlying are recognized foundations technology. Against this backdrop, in situ spectroscopic characterization techniques serve powerful tools achieving goal by enabling real-time monitoring capture key intermediates. This Account summarizes recent advances cutting-edge spectroscopy probing process. The fundamentals device configurations these briefly introduced, advantages each technique intermediates to unveil also been discussed. Finally, challenges, trends, prospects field presented.

Language: Английский

Citations

2
Switchable Acidic Oxygen Evolution Mechanisms on Atomic Skin of Ruthenium Metallene Oxides DOI
Tianyi Gao,

Dongxu Jiao,

Lina Wang

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 25, 2024

RuO2 has been considered as a promising, low-cost, and highly efficient catalyst in the acidic oxygen evolution reaction (OER). However, it suffers from poor stability due to inevitable involvement of lattice mechanism (LOM). Here, we construct unique metallene-based core-skin structure unveil that OER pathway atomic skin can be regulated LOM an adsorbate by altering core species metallene oxides metallenes. This switch is achieved without sacrificing number active sites, enabling Pd@RuO2 metallenes exhibit outstanding activity with low overpotential 189 mV at 10 mA cm–2, which 54 lower than counterpart PdO@RuO2 Additionally, they also robust negligible decay over 100 h 50 outperforming most reported RuO2-based catalysts. Multiple spectroscopic analyses theoretical calculations demonstrate Pd-metallene core, acting electron donor, increases migration energy subsurface atoms optimizes adsorption intermediates on Ru mechanism. Such offers novel way for tuning catalytic behaviors electrocatalysts.

Language: Английский

Citations

1