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Cited by 373

The DOI matches its Crossref record; 57 of the 57 references it cites were found in a registry or an index.

Tuning of Trifunctional NiCu Bimetallic Nanoparticles Confined in a Porous Carbon Network with Surface Composition and Local Structural Distortions for the Electrocatalytic Oxygen Reduction, Oxygen and Hydrogen Evolution Reactions

Ahsan, Md Ariful, Puente Santiago, Alain R., Hong, Yu, Zhang, Ning, Cano, Manuel, Rodriguez-Castellon, Enrique, Echegoyen, Luis, Sreenivasan, Sreeprasad T., Noveron, Juan C.·2020·Journal of the American Chemical Society

Abstract

The rational design of multifunctional catalysts that use non-noble metals to facilitate the interconversion between H 2, O 2, and H 2 O is an intense area of investigation. Bimetallic nanosystems with highly tunable electronic, structural, and catalytic properties that depend on their composition, structure, and size have attracted considerable attention. Herein, we report the synthesis of bimetallic nickel–copper (NiCu) alloy nanoparticles confined in a sp 2 carbon framework that exhibits trifunctional catalytic properties toward hydrogen evolution (HER), oxygen reduction (ORR), and oxygen evolution (OER) reactions. The electrocatalytic functions of the NiCu nanoalloys were experimentally and theoretically correlated with the composition-dependent local structural distortion of the bimetallic lattice at the nanoparticle surfaces. Our study demonstrated a downshift of the d-band of the catalysts that adjusts the binding energies of the intermediate catalytic species. XPS analysis revealed that the binding energy for Ni 2p 3/2 band of the Ni 0.25 Cu 0.75 /C nanoparticles was shifted ∼3 times compared to other bimetallic systems, and this was correlated to the high electrocatalytic activity observed. Interestingly, the bimetallic Ni 0.25 Cu 0.75 /C catalyst surpassed the OER performance of RuO 2 benchmark catalyst exhibiting a small onset potential of 1.44 V vs RHE and an overpotential of 400 mV at 10 mA·cm –2 as well as the electrochemical long-term stability of commercial RuO 2 and Pt catalysts and kept at least 90% of the initial current applied after 20 000 s for the OER/ORR/HER reactions. This study reveals significant insight about the structure–function relationship for non-noble bimetallic nanostructures with multifunctional electrocatalytic properties.

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Crossref · 10.1021/jacs.0c06960

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Research works printed but not linked: 2

  1. 10.1103/PhysRevB.47.8471 · doi:10.1103/physrevb.47.8471
  2. 10.1021/jp3126285 · doi:10.1021/jp3126285

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Metadata

Authors
Ahsan, M. A., Puente Santiago, A. R., Hong, Y., Zhang, N., Cano, M., Rodriguez-Castellon, E., Echegoyen, L., Sreenivasan, S. T., & Noveron, J. C.
Venue
Journal of the American Chemical Society
Published
2020-07-27
Volume
142
Issue
34
Pages
14688-14701
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W3046126518
Cited by
373
References
57
FWCI
10.46
Type
journal article
Language
en
Open access
closed
Funders
  • Division of Chemistry (CHE-18001317)
  • Welch Foundation (AH-0033)
  • Ministerio de Ciencia, Innovaci?n y Universidades (RTI2018-099668-BC22)
  • Junta de Andaluc?a (UCO-1263193)
  • National Institute of Food and Agriculture (2019-38422-30214)
  • European Regional Development Fund
  • Division of Engineering Education and Centers (1449500)
  • University of Texas at El Paso
  • Division of Materials Research (DMR-1827745)

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