General Lab Information

Iradwikanari (Ira) Waluyo

IOS Lead Beamline Scientist, Soft X-ray Scattering & Spectroscopy Program, National Synchrotron Light Source II

Iradwikanari (Ira) Waluyo

Brookhaven National Laboratory

National Synchrotron Light Source II
Bldg. 741, Room 1L110
P.O. Box 5000
Upton, NY 11973-5000

(631) 344-3421
iwaluyo@bnl.gov

Preferred Gender Pronouns (PGPs): she, her, hers

Ira is the lead scientist of the In situ and Operando Soft X-ray Spectroscopy (IOS, 23-ID-2) beamline at NSLS-II. Her expertise is in soft X-ray spectroscopy, in particular ambient pressure X-ray photoelectron spectroscopy (AP-XPS) and soft X-ray absorption spectroscopy/near edge X-ray absorption fine structure spectroscopy (XAS/NEXAFS), to study energy materials and processes. Her research interests are in the study of the surface chemical and electronic states of model heterogeneous catalysts such as metal alloys and metal oxides under in situ conditions.

Ira’s experience with X-ray spectroscopy started as a PhD student at Stanford University, where she performed her research at the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, to study water and ice in aqueous solutions and on solid surfaces using various synchrotron techniques (XPS, XAS/NEXAFS, X-ray Raman scattering, small angle X-ray scattering). After obtaining her PhD in 2011, she started a postdoctoral position at the University of Illinois at Chicago, performing research on the mechanism of surface reactions on single crystals using infrared reflection absorption spectroscopy (IRRAS).

In 2014, Ira started a second postdoctoral position in the Chemistry Division at BNL to study metal and metal oxide-based model heterogeneous catalysts in situ using AP-XPS. She also played a key role in commissioning the 23-ID-2 (then CSX-2, now IOS) beamline at NSLS-II before being hired as beamline scientist in 2015.

Expertise | Research | Education | Appointments | Publications

Expertise

Ambient pressure X-ray photoelectron spectroscopy, soft X-ray absorption spectroscopy, surface science, heterogeneous catalysis

Research Activities

My research interest is studying heterogeneous catalytic model systems (bimetallic alloys, metal oxides) in reaction conditions using in situ soft X-ray spectroscopy, particularly ambient pressure XPS and XAS. Two ongoing projects are: the interaction of single-atom alloy catalyst model systems (PtCu, RhCu) with reactant gases at ambient pressures, and PdZn catalyst for CO2 hydrogenation.

Education

Ph.D. in Chemistry, Stanford University, 2011

B.S. in Chemistry, San Diego State University, 2005

Professional Appointments

Jan. 2023 - present: Senior Scientist (RS-6), NSLS-II, BNL

Oct. 2020 - Dec. 2022: Chemist (S-3/RS-5), NSLS-II, BNL

Oct. 2017 - Sep. 2020: Associate Chemist (S-2), NSLS-II, BNL

Jul. 2015 - Sep. 2017: Assistant Chemist (S-1), NSLS-II, BNL

May 2014 - Jul. 2015: Research Associate, Chemistry Division, BNL

July 2011 - May 2014: Postdoctoral Research Associate, Department of Chemistry, University of Illinois at Chicago

Selected Publications

  • Schilling AC, Groden K, Simonovis JP, Hunt A, Hannagan RT, Çinar V, McEwen J-S, Sykes ECH, Waluyo I (2020) Accelerated Cu2O Reduction by Single Pt Atoms at the Metal-Oxide Interface. ACS Catalysis 10:4215–4226. doi: 10.1021/acscatal.9b05270
  • Zhu Z, Gao R, Waluyo I, Dong Y, Hunt A, Lee J, Li J (2020) Stabilized Co-Free Li-Rich Oxide Cathode Particles with An Artificial Surface Prereconstruction. Advanced Energy Materials 10:2001120. doi: 10.1002/aenm.202001120
  • Deng X, Sorescu DC, Waluyo I, Hunt A, Kauffman DR (2020) Bulk vs Intrinsic Activity of NiFeOx Electrocatalysts in the Oxygen Evolution Reaction: The Influence of Catalyst Loading, Morphology, and Support Material. ACS Catalysis 10:11768–11778. doi: 10.1021/acscatal.0c03109
  • Garcia-Martinez F, García-Fernández C, Simonovis JP, Hunt A, Walter A, Waluyo I, Bertram F, Merte LR, Shipilin M, Pfaff S, Blomberg S, Zetterberg J, Gustafson J, Lundgren E, Sánchez-Portal D, Schiller F, Ortega JE (2020) Catalytic Oxidation of CO on a Curved Pt(111) Surface: Simultaneous Ignition at All Facets through a Transient CO-O Complex**. Angewandte Chemie 132:20212–20218. doi: 10.1002/ange.202007195
  • Kersell H, Hooshmand Z, Yan G, Le D, Nguyen H, Eren B, Wu CH, Waluyo I, Hunt A, Nemšák S, Somorjai G, Rahman TS, Sautet P, Salmeron M (2020) CO Oxidation Mechanisms on CoOx-Pt Thin Films. Journal of the American Chemical Society 142:8312–8322. doi: 10.1021/jacs.0c01139
  • Simonovis JP, Hunt A, Senanayake SD, Waluyo I (2019) Subtle and reversible interactions of ambient pressure H2 with Pt/Cu(111) single-atom alloy surfaces. Surface Science 679:207–213. doi: 10.1016/j.susc.2018.09.003
  • Shen X, Zhang C, Zhang S, Dai S, Zhang G, Ge M, Pan Y, Sharkey SM, Graham GW, Hunt A, Waluyo I, Miller JT, Pan X, Peng Z (2018) Deconvolution of octahedral Pt3Ni nanoparticle growth pathway from in situ characterizations. Nature Communications. doi: 10.1038/s41467-018-06900-z
  • Zhu Z, Yu D, Yang Y, Su C, Huang Y, Dong Y, Waluyo I, Wang B, Hunt A, Yao X, Lee J, Xue W, Li J (2019) Gradient Li-rich oxide cathode particles immunized against oxygen release by a molten salt treatment. Nature Energy 4:1049–1058. doi: 10.1038/s41560-019-0508-x
  • Tan AJ, Huang M, Sheffels S, Büttner F, Kim S, Hunt AH, Waluyo I, Tuller HL, Beach GSD (2019) Hydration of gadolinium oxide (GdOx) and its effect on voltage-induced Co oxidation in a Pt/Co/GdOx/Au heterostructure. Physical Review Materials. doi: 10.1103/physrevmaterials.3.064408
  • Simonovis JP, Hunt A, Palomino RM, Senanayake SD, Waluyo I (2018) Enhanced Stability of Pt-Cu Single-Atom Alloy Catalysts: In Situ Characterization of the Pt/Cu(111) Surface in an Ambient Pressure of CO. The Journal of Physical Chemistry C 122:4488–4495. doi: 10.1021/acs.jpcc.8b00078
Iradwikanari (Ira) Waluyo

Brookhaven National Laboratory

National Synchrotron Light Source II
Bldg. 741, Room 1L110
P.O. Box 5000
Upton, NY 11973-5000

(631) 344-3421
iwaluyo@bnl.gov

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