Research Highlight

Lanthanide Metal-Assisted Synthesis of Rhombic Dodecahedral MNi (M=Ir and Pt) Nanoframes toward Efficient Oxygen Evolution Catalysis

Extra Form
author H. Jin, Y. Hong, J. Yoon, A. Oh, N. K. Chaudhari, H. Baik, S. H. Joo, and K. Lee*
journal Nano Energy, 2017, 42, 17.
link http://www.sciencedirect.com/science/art...5517306377
Atachment
첨부파일 '1'
?

단축키

Prev이전 문서

Next다음 문서

+ - Up Down Comment Print
?

단축키

Prev이전 문서

Next다음 문서

+ - Up Down Comment Print
145.jpg



Synthesis of MNi (M = Ir or Pt) nanoframe via facet-passivation agents and its excellent electrocatalytic activity and durability to oxygen evolution reaction in acidic electrolyte.



Mixed metal alloy nanoframeworks have shown a great promise as electrocatalysts in water electrolyzers and fuel cells. Although a limited number of mixed metal alloy nanoframeworks have been synthesized through phase segregation of alloy phases and removal of a component, there remains a strong need for a straightforward and facile synthesis route to this important nanostructure. A wide avenue for nanoframework structures can be opened with a fail-proof method for edge-coating shape-controlled template nanoparticles. Herein, we demonstrate that lanthanide metal chlorides can selectively passivate facets of a Ni nanotemplate, leaving the edges for the growth of a secondary metal (M = Ir, Pt). The edge-deposited metal can be further in situ mixed with the underlying Ni phase to afford rhombic dodecahedral nanoframes of binary alloy phases, namely, IrNi (IrNi-RF) and PtNi (PtNi-RF). IrNi-RF showed excellent electrocatalytic activity for the oxygen evolution reaction (OER) in an acidic electrolyte, requiring and overpotential of only 313.6 mV at 10 mA cm−2. Furthermore, even after 5000 potential cycles in the OER, IrNi-RF underwent little performance loss with an overpotential of 329.3 mV at 10 mA cm−2, demonstrating excellent catalytic stability. The presence of highly active grain boundaries, agglomeration-free frame structures, as well as the presence of IrNi/IrOx interface might be responsible for the excellent electrocatalytic activity and stability.


  1. Lanthanide Metal-Assisted Synthesis of Rhombic Dodecahedral MNi (M=Ir and Pt) Nanoframes toward Efficient Oxygen Evolution Catalysis

    H. Jin, Y. Hong, J. Yoon, A. Oh, N. K. Chaudhari, H. Baik, S. H. Joo, and K. Lee*
    Nano Energy, 2017, 42, 17.
    Synthesis of MNi (M = Ir or Pt) nanoframe via facet-passivation agents and its excellent electrocatalytic activity and durability to oxygen evolution reaction in acidic electrolyte. Mixed metal alloy nanoframeworks have shown a...
    Read More
  2. Radially Phase Segregated PtCu@PtCuNi Dendrite@Frame Nanocatalyst for the Oxygen Reduction Reaction

    J. Park, M. K. Kabiraz, H. Kwon, S. Park, H. Baik, S.-I. Choi*, K. Lee*
    ACS Nano, 2017, 11, 10844.
    Pt-based alloy nanoframes have shown a great potential as electrocatalysts toward oxygen reduction reaction (ORR) in fuel cells. However, the intrinsically infirm nanoframes could be severely deformed during extended electro-cyclings...
    Read More
  3. Iridium-based multimetallic nanoframe@nanoframe structure: An efficient and robust electrocatalyst toward oxygen evolution reaction

    J. Park, Y. J. Sa, H. Baik, T. Kwon, S. H. Joo*, K. Lee*
    ACS Nano, 2017, 11, 5500.
    Nanoframe electrocatalysts have attracted a great interest due to their inherently high active surface area per a given mass. Although recent progress has enabled the preparation of single nanoframe structures with a variety of...
    Read More
  4. Cobalt assisted synthesis of IrCu hollow octahedral nanocages as highly active electrocatalysts toward oxygen evolution reaction

    T. Kwon, H. Hwang, Y. J. Sa, J. Park, H. Baik, S. H. Joo*, K. Lee*
    Adv. Funct. Mater., 2017, 27, 1604688.
    . Development of oxygen evolution reaction (OER) catalysts with reduced precious metal content while enhancing catalytic performance has been of pivotal importance in cost-effective design of acid polymer electrolyte membrane water elect...
    Read More
  5. Facet-controlled hollow Rh2S3 hexagonal nanoprisms as highly active and structurally robust catalysts toward hydrogen evolution reaction

    D. Yoon, B. Seo, J. Lee, K. S. Nam, B. Kim, S. Park, H. Baik, S. H. Joo*, and K. Lee*
    Energy Environ. Sci., 2016,9, 850-856
    Developing highly active and structurally robust electrocatalysts for hydrogen evolution reaction (HER) is of paramount importance for sustainable and clean production of hydrogen. Metal sulphides exposing catalyti...
    Read More
  6. RhCu 3D Nanoframe as a Highly Active Electrocatalyst for oxygen evolution reaction under alkaline condition

    J. Park, J. Kim, Y. Yang, D. Yoon, H. Baik, S. Haam, H. Yang*, K. Lee*
    Adv. Sci. 2016, 1500252
    One pot synthesis of RhCu alloy truncated octahedral nanoframes, Cu@Rh core–shell nanoparticles, and a bundle of five RhCu nanowires is demonstrated. The RhCu alloy 3D nanoframe, in particular, exhibits excellent catalytic activit...
    Read More
  7. Rational Synthesis of Heterostructured M/Pt (M = Ru or Rh) Octahedral Nanoboxes and Octapods and Their Structure-Dependent Electrochemical Activity Toward the Oxygen Evolution Reaction

    H. Jin, K. W. Lee, N. T. Khi, H. An, J. Park, H. Baik, J. Kim, H. Yang*, K. Lee*
    Small, 2015, 11, 4462 (Cover Paper)
    Shape-controlled Pt-based seeds lead to completely different M/Pt (M = Ru or Rh) structures of nanobox or octapod. Unusually high catalytic activities of Pt@Ru octapod toward the oxygen evolution reaction are observe...
    Read More
  8. Skeletal platinum-based octahedral nanoframe with Cartesian coordinates via geometrically precise nanoscale phase segregation in a Pt@Ni core-shell nanocrystal

    A. Oh, H. Baik, D. S. Choi, J. Y. Cheon, B. Kim, H. Kim, S. Kwon, S. H. Joo*, Y. Jung*, K. Lee*
    ACS Nano, 2015, 9, 2856
    Catalytic properties of nanoparticles can be significantly enhanced by controlling nanoscale alloying and its structure. In this work, by using a facet-controlled Pt@Ni core–shell octahedron nanoparticle, we show that the...
    Read More
  9. Nanomaterials for Theranostics: Recent Advances and Future Challenges

    E. –K. Lim, T. Kim, S. Paik, S. Haam, Y.-M. Huh*, K. Lee*
    Chem. Rev., 2015, 115, 327
    This review mainly describes the theranostic research with nanomaterials since 2006, when nanomaterials started to be used extensively in the development of theranostic systems. First, a brief history of molecular imaging and per...
    Read More
Board Pagination ‹ Prev 1 Next ›
/ 1

Designed by sketchbooks.co.kr / sketchbook5 board skin

나눔글꼴 설치 안내


이 PC에는 나눔글꼴이 설치되어 있지 않습니다.

이 사이트를 나눔글꼴로 보기 위해서는
나눔글꼴을 설치해야 합니다.

설치 취소

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5