Skeletal octahedral nanoframe with Cartesian coordinates via geometrically precise nanoscale phase segregation in a Pt@Ni core-shell nanocrystal

ACS Nano
Aram OhKwangyeol Lee

Abstract

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 nanoscale phase segregation can have directionality and be geometrically controlled to produce a Ni octahedron that is penetrated by Pt atoms along three orthogonal Cartesian axes and is coated by Pt atoms along its edges. This peculiar anisotropic diffusion of Pt core atoms along the ⟨100⟩ vertex, and then toward the ⟨110⟩ edges, is explained via the minimum strain energy for Ni-Ni pair interactions. The selective removal of the Ni-rich phase by etching then results in structurally fortified Pt-rich skeletal PtNi alloy framework nanostructures. Electrochemical evaluation of this hollow nanoframe suggests that the oxygen reduction reaction (ORR) activity is greatly improved compared to conventional Pt catalysts.

References

Dec 15, 1994·Physical Review. B, Condensed Matter·P E Blöchl
Oct 28, 1996·Physical Review Letters·J P PerdewM Ernzerhof
Apr 25, 2002·Annual Review of Physical Chemistry·Jeff GreeleyManos Mavrikakis
Dec 14, 2002·Science·Yugang Sun, Younan Xia
May 1, 2004·Science·Yadong YinA Paul Alivisatos
Oct 27, 2004·Nature Materials·Jeff Greeley, Manos Mavrikakis
Jan 11, 2005·The Journal of Chemical Physics·Guofeng WangM I Baskes
Jan 16, 2007·Science·Vojislav R StamenkovicNenad M Marković
Feb 21, 2007·Nature Materials·Vojislav R StamenkovicNenad M Markovic
Jul 10, 2007·Nature Materials·Susan E HabasPeidong Yang
Apr 8, 2009·Angewandte Chemie·Karl J J MayrhoferMatthias Arenz
Sep 21, 2010·Nature Materials·Janet E MacdonaldUri Banin
Jan 12, 2011·Proceedings of the National Academy of Sciences of the United States of America·Jens K NørskovThomas Bligaard
Apr 25, 2012·Journal of the American Chemical Society·Michael K CarpenterMisle M Tessema
Jun 29, 2012·Journal of the American Chemical Society·Jianbo WuHong Yang
Dec 1, 2012·Nano Letters·Kurian A KuttiyielRadoslav R Adzic
Jun 19, 2013·Angewandte Chemie·Shaojun GuoShouheng Sun
Mar 26, 2014·Journal of the American Chemical Society·Stephen R JacksonDavid W Wright
Aug 6, 2014·Journal of the American Chemical Society·Yuen WuYadong Li

❮ Previous
Next ❯

Citations

Mar 22, 2016·Nano Letters·Haihang YeXiaohu Xia
Oct 14, 2016·ACS Applied Materials & Interfaces·Jianbing ZhuWei Xing
Jun 29, 2017·Journal of the American Chemical Society·Lingzheng BuXiaoqing Huang
Jun 2, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Yang LingNjud S Alharbi
Jul 17, 2018·Chemical Society Reviews·Jongsik ParkKwangyeol Lee
Mar 3, 2018·Advanced Structural and Chemical Imaging·Katherine E MacArthurRafal E Dunin-Borkowski
Jul 8, 2020·Advanced Materials·Taehyun KwonKwangyeol Lee
Jun 14, 2019·ACS Applied Materials & Interfaces·Grzegorz GruzełMagdalena Parlinska-Wojtan
Aug 30, 2019·Journal of the American Chemical Society·Faisal SaleemHua Zhang
Oct 4, 2019·Chemical Reviews·Chenlu XiePeidong Yang

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.