Ultrafine high-entropy alloy nanoparticles for extremely superior electrocatalytic methanol oxidation

•Propose a facile one-step synthesis for ultrafine and high-dispersed HEA particles.•Only rely on elemental interaction to obtain ultrafine size of HEA.•No employ additional surfactant or ligand for ultrafine size control of HEA.•The best acidic MOR activity for ultrafine HEA among reported Pt-based...

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Bibliographic Details
Published inMaterials letters Vol. 344; p. 134421
Main Authors Jin, Yu, Li, Ruojing, Zhang, Xiaodong, Cao, Kesheng, Liao, Binghua, Luo, Xiaoqiang, Li, Yanling, Ma, Wei
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.08.2023
Subjects
Metals and alloys
Methanol oxidation
Nanocomposites
Nanoparticles
Platinum
Ultrafine high-entropy alloy
Ultrafine high-entropy alloy
Nanoparticles
Metals and alloys
Nanocomposites
Platinum
Methanol oxidation
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Summary:•Propose a facile one-step synthesis for ultrafine and high-dispersed HEA particles.•Only rely on elemental interaction to obtain ultrafine size of HEA.•No employ additional surfactant or ligand for ultrafine size control of HEA.•The best acidic MOR activity for ultrafine HEA among reported Pt-based catalysts. To develop highly efficient catalysts with low Pt content for electrocatalytic methanol oxidation reaction (MOR) is meaningful yet still challenged. Here, PtPdCdZnCo ultrafine high-entropy alloy (uf-HEA) nanoparticles (∼2.6 nm) were achieved by a facile one-pot chemical synthesis. As MOR catalyst, the uf-HEA displays ultrahigh mass activity of 2.86 and 11.1 A mgPt−1 in acidic and alkaline environments, respectively. That is the best acidic MOR catalyst so far by comparing with other reported Pt-based catalysts. Study suggests the outstanding MOR activity is attributed to the weakened reaction intermediates adsorption on uf-HEA surface.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2023.134421