Title: Breaking with the Principles of Coreduction to Form Stoichiometric Intermetallic PdCu Nanoparticles

Journal Article · · Small Methods
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [4]; ORCiD logo [4]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Department of Chemistry and Nano‐Science Center University of Copenhagen Universitetsparken 5 Copenhagen 2100 Denmark
  2. Interdisciplinary Nanoscience Center &, Aarhus University Centre for Integrated Materials Research Aarhus University Gustav Wieds Vej 14 Aarhus C 8000 Denmark
  3. Department of Materials University of Oxford Parks Road Oxford OX1 3PH UK
  4. Diamond Light Source Harwell Campus Oxford OX11 0DE UK

Abstract Intermetallic nanoparticles (NPs) have shown enhanced catalytic properties as compared to their disordered alloy counterparts. To advance their use in green energy, it is crucial to understand what controls the formation of intermetallic NPs over alloy structures. By carefully selecting the additives used in NP synthesis, it is here shown that monodisperse, intermetallic PdCu NPs can be synthesized in a controllable manner. Introducing the additives iron(III) chloride and ascorbic acid, both morphological and structural control can be achieved. Combined, these additives provide a synergetic effect resulting in precursor reduction and defect‐free growth; ultimately leading to monodisperse, single‐crystalline, intermetallic PdCu NPs. Using in situ X‐ray total scattering, a hitherto unknown transformation pathway is reported that diverges from the commonly reported coreduction disorder–order transformation. A Cu‐rich structure initially forms, which upon the incorporation of Pd(0) and atomic ordering forms intermetallic PdCu NPs. These findings underpin that formation of stoichiometric intermetallic NPs is not limited by standard reduction potential matching and coreduction mechanisms, but is instead driven by changes in the local chemistry. Ultimately, using the local chemistry as a handle to tune the NP structure might open new opportunities to expand the library of intermetallic NPs by exploiting synthesis by design.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1872483
Journal Information:
Small Methods, Journal Name: Small Methods Journal Issue: 6 Vol. 6; ISSN 2366-9608
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United States
Language:
English

References (71)

Random Alloyed versus Intermetallic Nanoparticles: A Comparison of Electrocatalytic Performance journal July 2018
Large-Scale Synthesis of Silver Nanocubes: The Role of HCl in Promoting Cube Perfection and Monodispersity journal March 2005
Ordered PdCu-Based Nanoparticles as Bifunctional Oxygen-Reduction and Ethanol-Oxidation Electrocatalysts journal June 2016
Quantitative Analysis of the Multiple Roles Played by Halide Ions in Controlling the Growth Patterns of Palladium Nanocrystals journal February 2020
Bromide Ions Triggered Synthesis of Noble Metal–Based Intermetallic Nanocrystals journal September 2020
Ascorbic Acid Oxidation by Hydrogen Peroxide journal January 1998
Microstructural changes during annealing of FePd-based thin films journal September 2003
The nature of A1–L10 ordering transitions in alloy nanoparticles: A Monte Carlo study journal September 2006
Bimetallic Pd–Cu catalysts for selective CO2 hydrogenation to methanol journal July 2015
Alloy vs. intermetallic compounds: Effect of the ordering on the electrocatalytic activity for oxygen reduction and the stability of low temperature fuel cell catalysts journal November 2017
Cu-Pd alloy nanoparticles as highly selective catalysts for efficient electrochemical reduction of CO2 to CO journal June 2019
First-principles calculations of the palladium(II) acetylacetonate crystal structure journal November 2008
One-step stabilizer-free synthesis of porous bimetallic PdCu nanofinger supported on graphene for highly efficient methanol electro-oxidation journal January 2018
In situ monitoring of disorder–order A1–L10 FePt phase transformation in nanocomposite FePt-based alloys journal December 2014
Electron Microscopy (Big and Small) Data Analysis With the Open Source Software Package HyperSpy journal July 2017
Intermetallic Nanoparticles: Synthetic Control and Their Enhanced Electrocatalysis journal March 2019
Organic Phase Syntheses of Magnetic Nanoparticles and Their Applications journal June 2016
Bimetallic Nanocrystals: Syntheses, Properties, and Applications journal July 2016
In Situ X-ray Scattering Guides the Synthesis of Uniform PtSn Nanocrystals journal May 2018
Halide Ion-Mediated Synthesis of L1 0 -FePt Nanoparticles with Tunable Magnetic Properties journal November 2018
Disorder-to-Order Transition Mediated by Size Refocusing: A Route toward Monodisperse Intermetallic Nanoparticles journal August 2019
Synthetically Tuned Atomic Ordering in PdCu Nanoparticles with Enhanced Catalytic Activity toward Solvent-Free Benzylamine Oxidation journal January 2017
Size-Dependent Disorder–Order Transformation in the Synthesis of Monodisperse Intermetallic PdCu Nanocatalysts journal May 2016
Solution Synthesis of Nanocrystalline M−Zn (M = Pd, Au, Cu) Intermetallic Compounds via Chemical Conversion of Metal Nanoparticle Precursors journal August 2007
Oxidative Etching and Its Role in Manipulating the Nucleation and Growth of Noble-Metal Nanocrystals journal August 2013
Crystallite Size Controls the Crystal Structure of Cu 60 Pd 40 Nanoparticles journal November 2009
Nanoalloys:  From Theory to Applications of Alloy Clusters and Nanoparticles journal March 2008
The Far-Infrared Spectra of Metal-Halide Complexes of Pyridine and Related Ligands journal March 1965
Synthesis of Atomically Ordered AuCu and AuCu 3 Nanocrystals from Bimetallic Nanoparticle Precursors journal June 2004
Kinetically Controlled Synthesis of Triangular and Hexagonal Nanoplates of Palladium and Their SPR/SERS Properties journal December 2005
Shape-Controlled Conversion of β-Sn Nanocrystals into Intermetallic M -Sn ( M = Fe, Co, Ni, Pd) Nanocrystals journal June 2007
Electroreduction of Carbon Dioxide to Hydrocarbons Using Bimetallic Cu–Pd Catalysts with Different Mixing Patterns journal December 2016
Highly Active and Selective Hydrogenation of CO 2 to Ethanol by Ordered Pd–Cu Nanoparticles journal May 2017
Preserving the Exposed Facets of Pt 3 Sn Intermetallic Nanocubes During an Order to Disorder Transition Allows the Elucidation of the Effect of the Degree of Alloy Ordering on Electrocatalysis journal January 2020
Au−Cu Alloy Nanoparticles with Tunable Compositions and Plasmonic Properties: Experimental Determination of Composition and Correlation with Theory journal October 2010
Atomic Ordering Enhanced Electrocatalytic Activity of Nanoalloys for Oxygen Reduction Reaction journal September 2013
Polyol Synthesis of Silver Nanostructures:  Control of Product Morphology with Fe(II) or Fe(III) Species journal August 2005
Polyol Synthesis of Silver Nanoparticles:  Use of Chloride and Oxygen to Promote the Formation of Single-Crystal, Truncated Cubes and Tetrahedrons journal September 2004
Control Over the Branched Structures of Platinum Nanocrystals for Electrocatalytic Applications journal October 2012
Gamma to Alpha Transformation in Iron Alloyed with Palladium journal August 1938
Size and shape effects on the order–disorder phase transition in CoPt nanoparticles journal November 2009
When atoms move around journal December 2009
Fiji: an open-source platform for biological-image analysis journal June 2012
Array programming with NumPy journal September 2020
SciPy 1.0: fundamental algorithms for scientific computing in Python journal February 2020
Rapid synthesis of silver nanowires through a CuCl- or CuCl 2 -mediated polyol process journal January 2008
The chemistry of nucleation journal January 2016
Kinetics, energetics, and size dependence of the transformation from Pt to ordered PtSn intermetallic nanoparticles journal January 2019
Order engineering on the lattice of intermetallic PdCu co-catalysts for boosting the photocatalytic conversion of CO 2 into CH 4 journal January 2018
Exploring the origins of crystallisation kinetics in hierarchical materials using in situ X-ray diffraction and pair distribution function analysis journal January 2020
Linear negative thermal expansion in Pd(acac) 2 journal January 2021
Synthesis of small silver nanocubes in a hydrophobic solvent by introducing oxidative etching with Fe(iii) species journal January 2010
Size dependence of ordering in FePt nanoparticles journal March 2004
Effects of ensembles, ligand, and strain on adsorbate binding to alloy surfaces journal November 2018
Two-dimensional detector software: From real detector to idealised image or two-theta scan journal January 1996
Ultrasonic synthesis and optical properties of Au/Pd bimetallic nanoparticles in ethylene glycol journal June 2003
PDFfit2 and PDFgui: computer programs for studying nanostructure in crystals journal July 2007
Electronic structure calculations with GPAW: a real-space implementation of the projector augmented-wave method journal June 2010
The atomic simulation environment—a Python library for working with atoms journal June 2017
Real-space grid implementation of the projector augmented wave method journal January 2005
Density functionals for surface science: Exchange-correlation model development with Bayesian error estimation journal June 2012
Full Tunability of Strain along the fcc-bcc Bain Path in Epitaxial Films and Consequences for Magnetic Properties journal November 2009
Generalized Gradient Approximation Made Simple journal October 1996
Rapid-acquisition pair distribution function (RA-PDF) analysis journal November 2003
How metallation affects solid-state conformation and assembly of hexameric cyclic peptoids journal August 2013
FIT2D : a multi-purpose data reduction, analysis and visualization program journal March 2016
Data Analysis WorkbeNch ( DAWN ) journal April 2015
Biaxially strained PtPb/Pt core/shell nanoplate boosts oxygen reduction catalysis journal December 2016
Über die vermeintliche Isomerie des roten und gelben Quecksilberoxyds und die Oberflächenspannung fester Körper journal July 1900
Martensitic Transformation in the Fe–Pd Alloy System journal January 1984
scikit-image: image processing in Python journal January 2014