Integration of Phosphorus in PdCr Metallene for Enhanced CO-Tolerant Alcohol Electrooxidation DOI

Haiting Liu,

Tong Li,

Zizhan Wu

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 64(1), P. 123 - 132

Published: Dec. 24, 2024

Pd-based alloys are among the most attractive catalysts for direct alcohol fuel cells. However, their widespread use is limited by high cost of Pd and susceptibility to deactivation surface-adsorbed reaction intermediates, particularly CO. In this study, we engineered an ultrathin 2D PdCr metallene minimize usage doped it with phosphorus enhance its CO tolerance. The resulting P-PdCr demonstrated significantly higher activity, stability, tolerance electrooxidation various alcohols compared commercial Pd/C catalysts. Particularly, methanol oxidation (MOR), catalyst achieved a mass activity 2.64 A mg–1Pd specific 5.81 mA cm–2, maintaining remarkable stability over duration 27 h. Density functional theory calculations revealed that enhanced performance attributed incorporation Cr P atoms into structure. This reduces energy barriers potential-determining step in MOR process, mitigates adsorption on surface, accelerates conversion intermediates. strategic doping structure introduces novel approach developing electrooxidation.

Language: Английский

Atomic Cobalt-Doped Palladium Metallene toward Efficient Oxygen Reduction Electrocatalysis DOI
Zhe Gong, Zhiping Deng, Yongqian Wang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 14, 2025

Designing a high-efficiency catalyst for the cathode oxygen reduction reaction (ORR) in fuel cells still faces enormous challenges due to stringent requirements high power density and long-term durability. Palladium (Pd) metallene, on account of its unique properties Pd utilization efficiency, is recognized as prospective candidate enhancing ORR catalytic performance. Herein, we present atomic cobalt (Co)-doped metallene (Co-Pdene), featuring an ultrathin highly curved morphology, developed via straightforward wet-chemical approach efficient electrocatalysis alkaline media. Resulting from structure transition metal Co doping, Co-Pdene demonstrates exceptional electrocatalytic performance, achieving electrochemical mass activity (MA) 3.14 A per milligram palladium at 0.85 V while maintaining structural integrity over 30000 potential cycles. Theory simulations (DFT) manifest that single-atom sites optimize electronic Co-Pdene, thereby lowering theoretical overpotential 0.29 V. This work proposes innovative design strategy metal-doped electrocatalyst.

Language: Английский

Citations

0
Integration of Phosphorus in PdCr Metallene for Enhanced CO-Tolerant Alcohol Electrooxidation DOI

Haiting Liu,

Tong Li,

Zizhan Wu

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 64(1), P. 123 - 132

Published: Dec. 24, 2024

Pd-based alloys are among the most attractive catalysts for direct alcohol fuel cells. However, their widespread use is limited by high cost of Pd and susceptibility to deactivation surface-adsorbed reaction intermediates, particularly CO. In this study, we engineered an ultrathin 2D PdCr metallene minimize usage doped it with phosphorus enhance its CO tolerance. The resulting P-PdCr demonstrated significantly higher activity, stability, tolerance electrooxidation various alcohols compared commercial Pd/C catalysts. Particularly, methanol oxidation (MOR), catalyst achieved a mass activity 2.64 A mg–1Pd specific 5.81 mA cm–2, maintaining remarkable stability over duration 27 h. Density functional theory calculations revealed that enhanced performance attributed incorporation Cr P atoms into structure. This reduces energy barriers potential-determining step in MOR process, mitigates adsorption on surface, accelerates conversion intermediates. strategic doping structure introduces novel approach developing electrooxidation.

Language: Английский

Citations

2