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<p class="MsoNormal" align="center" style="text-align:center"><b><span lang="EN-US" style="font-size:18.0pt;font-family:"Candara","sans-serif"">Vabilo na predavanje / Invitation to the Lecture<o:p></o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US" style="font-size:9.0pt;font-family:"Candara","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt;font-family:"Candara","sans-serif"">dr. Aleksandar R. Zeradjanin<sup>a,b</sup>
<o:p></o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center;text-autospace:none">
<sup><span style="font-family:"Candara","sans-serif"">a</span></sup><span style="font-family:"Candara","sans-serif"">Universität Bremen and
<sup>b</sup>Max Planck Institut für Eisenforschung </span><b><span style="font-size:8.0pt;font-family:"Candara","sans-serif""> </span></b><b><span lang="EN-US" style="font-size:8.0pt;font-family:"Candara","sans-serif""><o:p></o:p></span></b></p>
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<b><span lang="EN-US" style="font-size:8.0pt;font-family:"Candara","sans-serif"">email:
<a href="mailto:aleksandar.zeradjanin@uni-bremen.de">aleksandar.zeradjanin@uni-bremen.de</a><o:p></o:p></span></b></p>
<p class="MsoNormal" align="center" style="margin-bottom:6.0pt;text-align:center;line-height:150%">
<b><span lang="EN-US" style="font-size:8.0pt;line-height:150%;font-family:"Candara","sans-serif""><o:p> </o:p></span></b></p>
<p class="MsoNormal" align="center" style="margin-bottom:6.0pt;text-align:center;line-height:150%">
<b><span lang="EN-US" style="font-size:16.0pt;line-height:150%;font-family:"Candara","sans-serif"">Èetrtek, 25. 4. 2019, ob 11:00</span></b><span style="font-size:16.0pt;line-height:150%;font-family:"Candara","sans-serif""><o:p></o:p></span></p>
<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US" style="font-size:14.0pt;font-family:"Candara","sans-serif"">Velika predavalnica / Kemijski in¹titut, Hajdrihova 19, Ljubljana<o:p></o:p></span></p>
<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US" style="font-size:14.0pt;font-family:"Candara","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal" align="center" style="margin-bottom:6.0pt;text-align:center">
<b><span style="font-size:16.0pt;font-family:"Candara","sans-serif"">Importance of Advanced Diagnostics in Designing of Interfaces for Electrocatalytic Water Splitting
<o:p></o:p></span></b></p>
<p class="MsoNormal" style="text-align:justify"><span lang="EN-US" style="font-family:"Candara","sans-serif"">Amongst the central challenges for large-scale application of electrochemical energy conversion, employing reactors for water electrolysis and CO2
reduction, is low efficiency of the anodic oxygen evolution reaction (OER). Despite metal-oxides are representative class of compounds used as electrode materials, after more than 40 years of intensive research on OER, it is still not clear what governs catalytic
activity and what assures long-term catalytic performance. At technically relevant current densities, the critical point for obtaining a conclusive picture about the electrode performance is to understand the dynamic behavior of the triple-phase boundary.
Fluctuations in the magnitude of the active surface area, due to gas-blockage of active sites, induces great uncertainty in kinetic analysis which is usually based on stationary electrochemical methods. Consequently, the task of the highest merit is to employ
advanced analytical tools and create methodologies which allow realistic insight into dynamic behavior of the electrode/electrolyte interface during the gas release. In this work, recently developed approaches for comprehensive activity/stability studies based
on scanning electrochemical microscopy (SECM) and scanning flow cell coupled to the inductively coupled mass spectrometer (SFC-ICPMS) will be discussed. Based on the information gathered using SECM and SFC-ICPMS, a perspective for the design of highly active
and highly stable catalysts for the OER will be thoroughly analyzed.
<o:p></o:p></span></p>
<p class="MsoNormal" style="text-align:justify"><span lang="EN-US" style="font-family:"Candara","sans-serif"">In the second part of the lecture, it will be discussed can Sabatier principle, as key paradigm of gas-phase heterogeneous catalysis, be transferred
to electrocatalysis in straightforward manner, as usually portrayed. While predictive models, based on the optimal adsorption energies of key intermediate(s), so called “volcano” plots, are widely accepted and Sabatier principle as a concept seems to be intuitive,
argumentation shown in this work indicates that electrocatalytic reactions encompass level of complexity which still represents challenge for comprehension even in a case of “simple” reaction like hydrogen evolution reaction (HER). Namely, interaction between
electrode material and electrolyte could alter electrode surface in a sense that no bulk or surface property of material could be directly linked to the rate of electrocatalytic reaction. This suggests, not only that solvent plays very important role in the
kinetics of electrocatalytic reactions, but rather suggests importance of interfacial phenomena, which are strictly result of interaction between electrode material and solvent. Crucial questions are: 1) what is/are the adequate catalytic descriptor/s b) can
we confirm it experimentally and 3) what triggers HER. Answers on the posed questions was suggested by careful analysis of key contributions about HER up to date, together with new experimental insights obtained in our lab.</span><span style="font-family:"Candara","sans-serif""><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Candara","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Candara","sans-serif"">info:
</span><a href="mailto:nejc.hodnik@ki.si"><span lang="EN-US" style="font-family:"Candara","sans-serif"">nejc.hodnik@ki.si</span></a><span style="font-family:"Candara","sans-serif"">
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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