Highly Dispersed Cu Atoms Induce Alternating Surface Microstrain in PtCu Concave Octahedral Nanoparticles Accelerating Oxygen Reduction Reaction DOI

Xiashuang Luo,

Cehuang Fu, Shuiyun Shen

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(17), P. 13088 - 13097

Published: Aug. 16, 2024

A comprehensive understanding of the intricate surface environments practical nanocatalysts at atomic level is essential for advancing our knowledge catalytic mechanisms. In this study, we investigate PtCu octahedral nanoparticles with varying microstrains engineered by Cu dispersion. detailed analysis atom configuration and corresponding microstrain conducted. The intimate mixing Pt results in increased randomness displacement within lattice a more pronounced distribution alternating on surfaces. Specifically, observe that concave demonstrate substantial oxygen reduction reaction (ORR) activity 3.95 mA cm–2 area-specific activity. significant impact shear further underscored, as evidenced an 86.9% decrease ORR upon removal microstrain. This study sheds light effects toward provides valuable insights into designing advanced Pt-based electrocatalysts.

Language: Английский

Stainless steel-derived nano-porous oxide: a cost-efficient, stable, and corrosion-resistant hydrogen evolution catalyst DOI
Ranjith Bose,

Surya Prakash Gajagouni,

Imad Barsoum

et al.

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(34), P. 22539 - 22549

Published: Jan. 1, 2024

The nanoporous metal oxide structure derived from stainless steel (SS) exhibits exceptional hydrogen evolution reaction activity and remarkable operational resilience, enduring 50 hours of continuous electrolysis.

Language: Английский

Citations

5
Synergistic interaction of monodisperse Pt nanoparticles with defect-rich graphene aerogel for efficient acidic hydrogen evolution DOI

Hu Yao,

Yu Xin, Yuxin Jia

et al.

Rare Metals, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

Language: Английский

Citations

0
Optimization of hollow Pt-Ni alloy bifunctional electrocatalysts via ethylene glycol/glycerol ratio in modified polyol process DOI

Dong-Geon Seo,

Deok‐Hye Park,

Seon-Ha Park

et al.

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 632, P. 236322 - 236322

Published: Jan. 30, 2025

Language: Английский

Citations

0
High‐Performance FeRu Alloy Electrocatalyst Integrated with a Mo Substrate for Hydrogen Evolution Reaction in Seawater DOI Open Access

Mengtian Huo,

Xinran Sun,

Jianhang Sun

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 19, 2025

Abstract The production of hydrogen from seawater offers a potential pathway to accomplish sustainable energy solutions. However, this process is impeded by the sluggish kinetics evolution reaction (HER) and corrosive nature seawater. In work, an FeRu alloy electrocatalyst integrated with Mo substrate (FeRu/MoO 2 @Mo) developed, specifically designed for HER in both alkaline environments. FeRu/MoO @Mo catalyst demonstrated remarkable performance, achieving overpotentials only 22, 42, 65 mV solution, simulated seawater, real at 10 mA cm −2 . Moreover, exhibited long‐term stability HER, maintaining its activity least 400 h under conditions 1 m KOH. situ Raman spectroscopy theoretical calculations revealed incorporation Fe reduces density states near Fermi level Ru, thereby optimizing adsorption–desorption behavior enhancing activity. This work scalable cost‐effective strategy development efficient non‐platinum catalysts.

Language: Английский

Citations

0
Dislocation-Activated Low Platinum-Loaded PtCu Nanoparticles Welded onto the Substrate for Practical Acidic Hydrogen Generation DOI
Miao Zhou, Yang Zhao, Xueru Zhao

et al.

ACS Applied Energy Materials, Journal Year: 2024, Volume and Issue: 7(9), P. 3848 - 3857

Published: May 2, 2024

Although transition metal (M) alloying with platinum (Pt) is a promising approach to reduce the Pt dosage required in hydrogen evolution reaction (HER), catalytic activity and durability of PtM alloy are often unsatisfactory for acidic HER, especially at high currents, due reduced number highly active sites atomic level challenges stabilizing them prevent detachment aggregation. Herein, we report robust functional structure integrated electrode (D-PtCu/CF) abundant edge dislocations very low content (0.1 mg cm–2) achieve stability HER within proton exchange membrane water electrolysis cell (PEMWE). D-PtCu/CF exhibits mass (10.28 A mgPt–1) excellent operational (negligible decay after 200 h). X-ray absorption spectroscopy situ electrochemical experiments reveal that lattice distortion caused by PtCu mainly affects atoms compressing strain, reducing their ability adsorb H. At same time, Cu subjected tensile enhancing bonding between Therefore, not only improve intrinsic but also increase (Cu) available adsorption, which synergistically accelerates kinetics reaction. The PEMWE employing can operate stably 100 h an industrial-level current density 500 mA cm–2 1.63 V.

Language: Английский

Citations

2
Highly Dispersed Cu Atoms Induce Alternating Surface Microstrain in PtCu Concave Octahedral Nanoparticles Accelerating Oxygen Reduction Reaction DOI

Xiashuang Luo,

Cehuang Fu, Shuiyun Shen

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(17), P. 13088 - 13097

Published: Aug. 16, 2024

A comprehensive understanding of the intricate surface environments practical nanocatalysts at atomic level is essential for advancing our knowledge catalytic mechanisms. In this study, we investigate PtCu octahedral nanoparticles with varying microstrains engineered by Cu dispersion. detailed analysis atom configuration and corresponding microstrain conducted. The intimate mixing Pt results in increased randomness displacement within lattice a more pronounced distribution alternating on surfaces. Specifically, observe that concave demonstrate substantial oxygen reduction reaction (ORR) activity 3.95 mA cm–2 area-specific activity. significant impact shear further underscored, as evidenced an 86.9% decrease ORR upon removal microstrain. This study sheds light effects toward provides valuable insights into designing advanced Pt-based electrocatalysts.

Language: Английский

Citations

1