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SUMMARY:SECM as a Versatile Toolbox for Elucidating  Manifold Challenges at
  the Electrochemical Interface
LOCATION:Chemistry A101
TZID:America/Denver
DTSTART:20199101T000000
UID:2026-05-06-22-49-00@natsci.colostate.edu
DTSTAMP:20260506T224900
Description:About the Seminar:\n\nElucidating and controlling interfacial r
 eactivity is key to a broad scope of electrochemical studies of catalysts\
 , sensors\, and energy storage media. I will present a modern approach to 
 understanding the electrochemical interface using scanning electrochemical
  microscopy (SECM)\, a scanned probe technique capable of delivering high 
 spatiotemporal and chemical redox resolution at active surfaces. SECM uses
  an electrochemical probe to detect and quantify species (e.g. discharged 
 products\, homogeneous and heterogeneous intermediates) and the kinetics o
 f processes (e.g. heterogeneous rate constants) through the use of highly 
 localized electrochemical techniques deployed by such probe. [1\,2] Our gr
 oup has expanded the toolbox of SECM techniques to include modes such as S
 urface Interrogation SECM\, where the surface coverage and dynamics of ads
 orbed intermediates are explored\, and the introduction of simultaneous an
 d co-localized SECM-Raman investigations of a variety of interfaces. [3\,4
 ] Such in situ approaches give us insight regarding the reactivity of indi
 vidual reacting sites within bulk electrodes\, including their evolution d
 uring operation\, and enable the construction of sensible structure–func
 tion correlations and electroanalytical models. Furthermore\, the use of m
 odel interfaces such as mono- and multilayer graphene allow us to use surf
 ace-enhanced spectroscopic modes and\, in general\, to use laser excitatio
 n to control reactivity at the mesoscale in exciting new ways. In my talk\
 , I will describe the main features of our instrumental setup\, applicatio
 ns to interface and bulk nanomaterials\, and emerging directions that ampl
 ify the role of hyphenated techniques coupled to the SECM into a highly ve
 rsatile toolbox for manifold electrochemical processes.\n\n[1] Counihan\, 
 M. et al. ChemElectroChem 2019\, 3507\; [2] Krumov\, M.R.\, et al. Anal. C
 hem. 2018\, 3050\; [3] Schorr\, N.B. et al. Anal. Chem. 2018\, 7848\; [4] 
 Schorr\, N.B. et al. Curr. Op. Electrochem. 2018\, 89.\n\nAbout the Speake
 r:\n\nJoaquín Rodríguez-López is an Associate Professor of Chemistry at
  the University of Illinois at Urbana-Champaign. He performed undergraduat
 e studies with Prof. Marcelo Videa at Tecnológico de Monterrey\, obtained
  a Ph.D. at the University of Texas at Austin with Allen J. Bard and did a
  post-doc with Héctor D. Abruña in Cornell University. Joaquin’s group
  combines interests in electroanalytical chemistry and energy materials by
  developing chemically-sensitive methods for studying ionic and electronic
  reactivity in nano-structures\, highly-localized surface features\, and u
 ltra-thin electrodes. Recognition to Joaquin’s work has come through awa
 rds such as Science News 10 Scientists to Watch (2018)\, the Society of El
 ectroanalytical Chemistry Royce W. Murray Young Investigator Award (2017)\
 , a Toyota-Electrochemical Society Young Investigator Fellowship (2017)\, 
 the Sloan Research Fellowship (2016)\, the East Central Illinois ACS Chapt
 er Distinguished Service Award (2016)\, the Society of Analytical Chemists
  of Pittsburgh Starter Grant (2015)\, and the ACS Division of Analytical C
 hemistry graduate fellowship award (2010)\, amongst other awards including
  various travel grants to attend conferences on electrochemistry and analy
 tical chemistry. 4:00 pm
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