Revealing the atomic ordering of binary intermetallics using in situ heating techniques at multilength scales | Zendy

Yin Xiong | Zendy; Yao Yang | Zendy; Howie Joress | Zendy; Elliot Padgett | Zendy; Unmukt Gupta | Zendy; Venkata Yarlagadda | Zendy; David N. Agyeman-Budu | Zendy; Xin Huang | Zendy; Thomas E. Moylan | Zendy; Rui Zeng | Zendy; Anusorn Kongkanand | Zendy; Fernando A. Escobedo | Zendy; J. D. Brock | Zendy; Francis J. DiSalvo | Zendy; David A. Muller | Zendy; Héctor D. Abruña | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Revealing the atomic ordering of binary intermetallics using in situ heating techniques at multilength scales

Author(s) -

Yin Xiong,

Yao Yang,

Howie Joress,

Elliot Padgett,

Unmukt Gupta,

Venkata Yarlagadda,

David N. Agyeman-Budu,

Xin Huang,

Thomas E. Moylan,

Rui Zeng,

Anusorn Kongkanand,

Fernando A. Escobedo,

J. D. Brock,

Francis J. DiSalvo,

David A. Muller,

Héctor D. Abruña

Publication year - 2019

Publication title -

proceedings of the national academy of sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.011

H-Index - 771

eISSN - 1091-6490

pISSN - 0027-8424

DOI - 10.1073/pnas.1815643116

Subject(s) - intermetallic , annealing (glass) , materials science , superlattice , diffraction , powder diffraction , proton exchange membrane fuel cell , synchrotron , catalysis , chemical engineering , x ray crystallography , nanoparticle , crystallography , nanotechnology , metallurgy , chemistry , alloy , organic chemistry , physics , nuclear physics , engineering , optoelectronics , optics

Significance We present a comprehensive quantitative study of the dynamic order–disorder phase transition of Pt3 Co nanoparticles, binary intermetallic oxygen-reduction reaction fuel cell electrocatalysts, during postsynthesis annealing. We employed in situ synchrotron-based X-ray diffraction (XRD) and in situ scanning transmission EM (STEM) to study the phase transition and morphological and structural changes during real-time annealing. In situ XRD revealed the impact of annealing/cooling conditions on the degree of ordering, particle size and lattice strain. In situ heating STEM enabled visualization of nanoparticle migration and growth. We find that a higher degree of ordering leads to more active and durable electrocatalysts. Our findings represent a groundbreaking advance in electrocatalyst development/design with a broad impact on energy materials, in general, and fuel cells, in particular.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research