Ligand Effect-Induced Electronic Structure Manipulation of Media-Entropy Alloy for Remarkable Stability over 50,000 Cycles in Oxygen Reduction DOI
Sijie Chen,

Dingli Bao,

Luping Zhang

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 19, 2024

Modulating the "trade-off" between activity and durability of Pd-based alloys while eliminating dissolution nonprecious metal element issue is highly significant for advancement commercializing anion-exchange membrane fuel cells (AEMFCs). Herein, by harmonizing composition ligand effects targeting stability concerns alloys, we propose PdRhNi ternary medium-entropy-alloy (MEA) networks (PdRhNi ANs) as exceptionally efficient oxygen reduction reaction (ORR) electrocatalysts via effect. The results theoretical calculations provide compelling evidence that effect Ni in ANs, which can endow an inductive to reshape electronic configuration induce a reduced energy barrier rate-determining steps, optimizes adsorption O-related intermediates lowers d-band center species, collectively boosting anti-CO capacity ORR efficiency. Consequently, as-made ANs not only demonstrate significantly enhanced electrocatalytic properties with half-wave potential 0.85 V excellent resistance CO toxicity, contrast those commercial Pt/C binary counterparts, but also exhibit negligible decline after 50,000 cycle examination. More excitingly, homemade AEMFC AN air cathode delivers higher power density 109 mW cm–2, surpassing PdRh AN-based battery, highlighting promising prospects implementing MEA materials engineering environments.

Language: Английский

Hollow structured photocatalysts DOI

Fangxuan Liu,

Ziyan Liu,

Guowei Zhou

et al.

Acta Physico-Chimica Sinica, Journal Year: 2025, Volume and Issue: unknown, P. 100071 - 100071

Published: Feb. 1, 2025

Language: Английский

Citations

0
Weakening O-Intermediates Adsorption Strength Over the Pd Metallene via Lewis-Acidic Site Modulation for Enhanced Oxygen Reduction DOI
Tongfei Li,

Tianheng Du,

Shuya Xu

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 27, 2024

The reasonable design and modulation of the electronic properties Pd metallene are acknowledged as a promising avenue for enhancing oxygen reduction reaction (ORR) in anion exchange membrane fuel cells (AEMFCs), yet they remain formidable challenge. Herein, thin-sheet structure Zr-doped (PdZr metallene) with abundant defects is proposed using facile wet-chemical approach efficient highly durable ORR electrocatalysis. Multiple microstructural analyses uncover that orchestrated oxophilic regulation PdZr via Lewis-acidic Zr site could concurrently optimize configuration Pd, downshift d-band center and, thus, promote intrinsic activity. Benefiting from unique two-dimensional morphology optimization facilitated by coupling effect, resultant demonstrates significantly enhanced electrocatalytic performance basic solutions, high half-wave potential (

Language: Английский

Citations

2
Ligand Effect-Induced Electronic Structure Manipulation of Media-Entropy Alloy for Remarkable Stability over 50,000 Cycles in Oxygen Reduction DOI
Sijie Chen,

Dingli Bao,

Luping Zhang

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 19, 2024

Modulating the "trade-off" between activity and durability of Pd-based alloys while eliminating dissolution nonprecious metal element issue is highly significant for advancement commercializing anion-exchange membrane fuel cells (AEMFCs). Herein, by harmonizing composition ligand effects targeting stability concerns alloys, we propose PdRhNi ternary medium-entropy-alloy (MEA) networks (PdRhNi ANs) as exceptionally efficient oxygen reduction reaction (ORR) electrocatalysts via effect. The results theoretical calculations provide compelling evidence that effect Ni in ANs, which can endow an inductive to reshape electronic configuration induce a reduced energy barrier rate-determining steps, optimizes adsorption O-related intermediates lowers d-band center species, collectively boosting anti-CO capacity ORR efficiency. Consequently, as-made ANs not only demonstrate significantly enhanced electrocatalytic properties with half-wave potential 0.85 V excellent resistance CO toxicity, contrast those commercial Pt/C binary counterparts, but also exhibit negligible decline after 50,000 cycle examination. More excitingly, homemade AEMFC AN air cathode delivers higher power density 109 mW cm–2, surpassing PdRh AN-based battery, highlighting promising prospects implementing MEA materials engineering environments.

Language: Английский

Citations

0