2D MOF-assisted Pyrolysis-displacement-alloying Synthesis of High-entropy Alloy Nanoparticles Library for Efficient Electrocatalytic Hydrogen Oxidation.

Autor: Qiu Z; School of Chemistry and Chemical Engineering, Yangzhou University, 225009, Yangzhou, Jiangsu, P. R. China., Li Y; School of Chemistry and Chemical Engineering, Yangzhou University, 225009, Yangzhou, Jiangsu, P. R. China., Gao Y; School of Chemistry and Chemical Engineering, Yangzhou University, 225009, Yangzhou, Jiangsu, P. R. China., Meng Z; School of Chemistry and Chemical Engineering, Yangzhou University, 225009, Yangzhou, Jiangsu, P. R. China., Sun Y; School of Chemistry and Chemical Engineering, Yangzhou University, 225009, Yangzhou, Jiangsu, P. R. China., Bai Y; School of Pharmacy, Changzhou University, 213164, Changzhou, Jiangsu, P. R. China.; State Key Laboratory of Coordination Chemistry, Nanjing University, 210023, Nanjing, Jiangsu, P. R. China., Suen NT; School of Chemistry and Chemical Engineering, Yangzhou University, 225009, Yangzhou, Jiangsu, P. R. China., Chen HC; Center for Reliability Science and Technologies, Chang Gung University, Kidney Research Center, Department of Nephrology, Chang Gung Memorial Hospital, Linkou, 333, Taoyuan, Taiwan., Pi Y; School of Chemistry and Chemical Engineering, Yangzhou University, 225009, Yangzhou, Jiangsu, P. R. China., Pang H; School of Chemistry and Chemical Engineering, Yangzhou University, 225009, Yangzhou, Jiangsu, P. R. China.
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2023 Aug 14; Vol. 62 (33), pp. e202306881. Date of Electronic Publication: 2023 Jul 11.
DOI: 10.1002/anie.202306881
Abstrakt: Multimetallic alloy nanoparticles (NPs) have received considerable attention in various applications due to their compositional variability and exceptional properties. However, the complexity of both the general synthesis and structure-activity relationships remain the long-standing challenges in this field. Herein, we report a versatile 2D MOF-assisted pyrolysis-displacement-alloying route to successfully synthesize a series of binary, ternary and even high-entropy NPs that are uniformly dispersed on porous nitrogen-doped carbon nanosheets (PNC NSs). As a proof of utility, the obtained Co 0.2 Ru 0.7 Pt 0.1 /PNC NSs exhibits apparent hydrogen oxidation activity and durability with a record-high mass specific kinetic current of 1.84 A mg -1 at the overpotential of 50 mV, which is approximately 11.5 times higher than that of the Pt benchmark. Both experimental and theoretical studies reveal that the addition of Pt engenders a phase transition in CoRu alloys from hexagonal close-packed (hcp) to face-centered cubic (fcc) structure. The elevated reactivity of the resulted ternary alloy can be attributed to the optimized adsorption of hydrogen intermediate and the decreased reaction barrier for water formation. This study opens a new avenue for the development of highly efficient alloy NPs with various compositions and functions.
(© 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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