Strain-Induced Dynamic Surface Exchange in Ternary Alloy Nanosponges for Stable PEM Water Electrolysis.

Fenghua Zheng, Ye Wang, Yuan Ren, Guiru Zhang, Enping Wang, Liuxuan Luo, Shuiyun Shen, Junliang Zhang

Abstract read

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Article in Advanced materials (Deerfield Beach, Fla.), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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8 authors.

Fenghua ZhengInstitute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China.

Ye WangInstitute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China.

Yuan RenInstitute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China.

Guiru ZhangInstitute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China.

Enping WangInstitute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China.

Liuxuan LuoInstitute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China.ORCID https://orcid.org/0000-0002-4899-7642

Shuiyun ShenInstitute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China.ORCID https://orcid.org/0000-0003-2455-7914

Junliang ZhangInstitute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China.

Funding

National Natural Science Foundation of China 22372101Science and Technology Commission of Shanghai Municipality 25DZ3001202

6 · The paper itself

Abstract

The anodic oxygen evolution reaction (OER) in proton exchange membrane water electrolysis (PEMWE) struggles against a persistent trilemma: achieving low iridium loading without sacrificing activity or stability. To overcome this, we design ultrafine IrRuCu ternary alloy nanosponges featuring an "artery-capillary" hierarchical mass-transfer network, synthesized via surfactant-assisted ethylene glycol reduction and selective etching. This catalyst exhibits a distinct gradient core-shell architecture, where lattice mismatch from the Cu/Ru-rich core triggers significant tensile strain in the outer active Ir shell. Integrating a series of comprehensive in situ characterization and DFT calculations, we uncover a novel, non-destructive strain-induced dynamic surface exchange mechanism. Tensile strain upshifts the Ir d-band center from -2.3 to -1.7 eV, amplifying the covalency and electrophilicity of surface Ir-O bonds to assemble a dense hydroxyl network at open-circuit potential. This geometric-electronic modulation slashes the rate-determining

Indexed as

dynamic surface exchangelow‐iridium electrocatalystoxygen evolution reactiontensile strainternary alloy nanosponges

Identifiers

PMID42351329

DOI10.1002/adma.73820

PMCPMC13431829

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.