Open AccessLaser Ultrafast Confined Alloying of Sub‐5 nm RuM (M = Cu, Rh, and Pd) Particles on Carbon Nanotubes for Hydrogen Evolution Reaction
Author(s) -
Hu Taiping,
Zhang Dongshi,
He Ningning,
Wei Shuxian,
Kang Xingyu,
Zhang Wei,
Cai Yunyu,
Ye Yixing,
Li Pengfei,
Liang Changhao
Publication year - 2025
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202415065
Subject(s) - materials science , carbon nanotube , hydrogen , laser , copper , chemical engineering , carbon fibers , rhodium , ultrashort pulse , nanotechnology , catalysis , analytical chemistry (journal) , metallurgy , chemistry , composite material , optics , organic chemistry , composite number , engineering , physics
Abstract Thermodynamic immiscibility is a challenge for intermetallic alloying of sub‐5 nm Ru‐based alloys, which are excellent electrochemical catalysts for water splitting. In this study, nanosecond laser ultrafast confined alloying (LUCA) is proposed to break the immiscible‐to‐miscible transition limit in the synthesis of carbon nanotubes (CNTs) supported sub‐5 nm bimetallic RuM (M = Cu, Rh, and Pd) alloy nanoparticles (NPs). The alloying of non‐noble metal Cu with varying atomic ratios of RuCu alloys is appealing owing to the low price of Cu and cost‐effective synthesis for large‐scale practical applications. Benefiting from the synergistic alloying effect and resultant H/OH binding energy alteration, the Ru 95 Cu 5 /CNTs catalysts display excellent electrocatalytic alkaline hydrogen evolution reaction (HER) activity with an overpotential of 17 mV and Tafel slope of 28.4 mV dec −1 at 10 mA cm −2 , and high robustness over long‐term 5000 cyclic voltammetry cycles. The performance is much better than LUCA‐synthesized CNTs‐supported Ru 86 Rh 14 , Ru 89 Pd 11 , Ru, and Cu NPs catalysts, commercial benchmark 20% Pt/C, and other mainstream Ru‐based catalysts including wet chemistry‐synthesized RuRh particles (overpotential of 25 mV, Tafel slope of 47.5 mVdec −1 ) and RuCu/CNTs (overpotential of 39 mV) synthesized using the flash Joule heating method, indicating the great potential of LUCA for screening new classes of HER catalysts.