Overcoming Interfacial Hydrogen Site-Blocking during Alkaline Formate Oxidation: Insights from Lattice-Compressed PdZr/C Catalysts DOI

Lanlan Shi,

Feike Zhang,

Xiaojun Wang

et al.

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

Published: Feb. 27, 2025

Improving the electrocatalytic conversion of formate in alkaline solutions is crucial for commercial application fuel cells. However, palladium-based catalysts used oxidation reactions (FOR) face challenges due to strong adsorption hydrogen intermediates, resulting lower catalytic efficiency environments. Herein, we prepared a PdZr/C catalyst aimed at employing doping-induced strain strategy reduce binding energy palladium and release more active sites formate. Through density functional theory calculations experimental investigations, find that lattice compression induced by Zr doping regulates electronic structure Pd. Specifically, incorporation dopant shifts d-band center Pd downward, weakening sites. This adjustment promotes desorption thus accelerating FOR kinetics alleviating site-blocking effect. As result, exhibited 2.4-fold increase activity compared conventional Pd/C catalyst. It also achieved peak potential delivered significantly higher current 1917 mA mg–1. These findings highlight critical role tuning properties offer valuable insights into design high-performance electrocatalysts technologies.

Language: Английский

Overcoming Interfacial Hydrogen Site-Blocking during Alkaline Formate Oxidation: Insights from Lattice-Compressed PdZr/C Catalysts DOI

Lanlan Shi,

Feike Zhang,

Xiaojun Wang

et al.

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

Published: Feb. 27, 2025

Improving the electrocatalytic conversion of formate in alkaline solutions is crucial for commercial application fuel cells. However, palladium-based catalysts used oxidation reactions (FOR) face challenges due to strong adsorption hydrogen intermediates, resulting lower catalytic efficiency environments. Herein, we prepared a PdZr/C catalyst aimed at employing doping-induced strain strategy reduce binding energy palladium and release more active sites formate. Through density functional theory calculations experimental investigations, find that lattice compression induced by Zr doping regulates electronic structure Pd. Specifically, incorporation dopant shifts d-band center Pd downward, weakening sites. This adjustment promotes desorption thus accelerating FOR kinetics alleviating site-blocking effect. As result, exhibited 2.4-fold increase activity compared conventional Pd/C catalyst. It also achieved peak potential delivered significantly higher current 1917 mA mg–1. These findings highlight critical role tuning properties offer valuable insights into design high-performance electrocatalysts technologies.

Language: Английский

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