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  <doc>
    <id>61980</id>
    <completedYear/>
    <publishedYear>2022</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
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    <title language="eng">Porous Carbon Supported Ni and Co Single Atom Catalysts for Electrochemical Reduction of Carbon Dioxide</title>
    <abstract language="eng">Non-precious metal single atom catalysts (generally labelled as M/NCs where M= Co, Fe, Ni etc.) consist of active metal centres dispersed on nitrogen doped porous carbon (NC) matrix at atomic level and exhibit promising activities e. g. for electrochemical reduction of CO2, selectively forming CO. We herein use identical Mg/NCs as platform for ion-exchange reactions towards morphologically equivalent Ni/NCs and Co/NCs. The Ni/NC catalyst shows almost double the specific activity and a Faraday efficiency of &gt;80% at a very low overpotential of U= -0.43 V (even 95% at U= -0.5 to -0.8 V) with high stability.</abstract>
    <enrichment key="eventName">GDCh Electrochemistry 2022</enrichment>
    <enrichment key="eventPlace">Berlin, Germany</enrichment>
    <enrichment key="eventStart">27.09.2022</enrichment>
    <enrichment key="eventEnd">30.09.2022</enrichment>
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    <author>Asad Mehmood</author>
    <author>Tim-Patrick Fellinger</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Electrochemical CO2 conversion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Single atom catalysts</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Porous Carbons</value>
    </subject>
    <collection role="ddc" number="621">Angewandte Physik</collection>
    <collection role="institutes" number="">3 Gefahrgutumschließungen; Energiespeicher</collection>
    <collection role="themenfelder" number="">Energie</collection>
    <collection role="themenfelder" number="">Elektrische Energiespeicher und -umwandlung</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Präsentation</collection>
    <collection role="institutes" number="">3.6 Elektrochemische Energiematerialien</collection>
  </doc>
  <doc>
    <id>62927</id>
    <completedYear/>
    <publishedYear>2025</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>lecture</type>
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    <belongsToBibliography>0</belongsToBibliography>
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    <title language="eng">ZIF-derived Atomically Dispersed Non-precious Metal Catalysts (M-N-C) for Electrochemical Energy Applications</title>
    <abstract language="eng">Zeolitic imidazolate frameworks (ZIFs) which are a subtype of metal organic frameworks (MOFs) have been extensively used to prepare catalyst materials for a variety of electrochemical reactions for energy conversion and storage applications. Most notable examples of ZIFs used for that purpose include ZIF-8 and ZIF-67 etc. Particularly ZIF-8 with its high surface area, defined pore structure and tunable particle size is widely utilized as a platform material to prepare so-called metal- and nitrogen-doped carbon (M-N-C) catalysts with M= Co, Fe, Ni, Zn etc., which are an emerging class of catalyst materials and consist of nitrogen-doped porous carbon matrix hosting atomically distributed active metal sites.[1, 2] The active sites in M-N-Cs ideally have M-N4 coordination resembling to metal centres in macromolecules such as porphyrins and phthalocyanines.[3] Most representative examples of M-N-Cs include Fe-N-Cs, Co-N-Cs and Ni-N-Cs etc. which are showing promising activities for a variety of electrochemical reactions e.g. oxygen reduction reaction (ORR), carbon dioxide reduction reaction (CO2RR) and hydrogen evolution reaction (HER). The structures of M-N-C catalysts are quite complex and require a fine balance between morphological, electronic, and chemical properties to reach optimal electrocatalytic activities. In this talk, I will present our activities on (i) preparation of phase-pure M-N-C catalysts derived from ZIF-8 via active-site imprinting [4, 5] and highlight the benefits of our strategy to achieve high density of active sites and enhanced electrochemical performance levels [6] and (ii) feasibility of using gas physisorption techniques as a new approach to quantify active sites in M-N-Cs. The challenges of maximizing active site utilization and eliminating unfavourable mass-transport characteristics faced by ZIF-8 derived M-N-Cs in electrochemical energy devices e.g. fuel cells will also be briefly discussed.</abstract>
    <identifier type="doi">https://doi.org/10.29363/nanoge.matsusspring.2025.251</identifier>
    <enrichment key="eventName">Materials for Sustainable Development Conference (MAT-SUS)</enrichment>
    <enrichment key="eventPlace">Sevilla, Spain</enrichment>
    <enrichment key="eventStart">03.03.20225</enrichment>
    <enrichment key="eventEnd">07.03.20225</enrichment>
    <enrichment key="InvitedTalks">0</enrichment>
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    <author>Asad Mehmood</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Electrochemical energy conversion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Single atom catalysts</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Electrochemical CO2 reduction</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fuel cells</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Electrolyzers</value>
    </subject>
    <collection role="ddc" number="621">Angewandte Physik</collection>
    <collection role="institutes" number="">3 Gefahrgutumschließungen; Energiespeicher</collection>
    <collection role="themenfelder" number="">Energie</collection>
    <collection role="themenfelder" number="">Elektrische Energiespeicher und -umwandlung</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Präsentation</collection>
    <collection role="institutes" number="">3.6 Elektrochemische Energiematerialien</collection>
  </doc>
  <doc>
    <id>65559</id>
    <completedYear/>
    <publishedYear>2026</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>26</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>42</volume>
    <type>article</type>
    <publisherName>Elsevier Ltd.</publisherName>
    <publisherPlace>Amsterdam</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
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    <title language="eng">Chemically complex materials enable sustainable high-performance materials</title>
    <abstract language="eng">Chemically complex materials (CCMats) 􀀀 including high-entropy alloys, oxides, and related multi-principal element systems 􀀀 offer a paradigm shift in materials design by leveraging chemical diversity to simultaneously optimize functional, structural, and sustainability criteria. The vastness of the compositional and structural space in CCMats propels the field into an expanding exploratory state. To reconcile functional and structural performance across this immense parameter space remains an open challenge. This Perspective evaluates the opportunities and challenges associated with harnessing chemical complexity across a broad spectrum of applications, such as hydrogen storage, ionic conductors, catalysis, magnetics, dielectrics, semiconductors, optical materials, and multifunctional structural systems. It is delineated how three central design strategies: targeted substitution (SUB), defect engineering (DEF), and diversity management (DIV) enable the reconciliation of high functional performance with long-term structural stability and environmental responsibility.&#13;
Advances in computational thermodynamics, microstructure simulations, machine learning, and multimodal characterization are accelerating the exploration and optimization of CCMats, while robust data infrastructures and automated synthesis workflows are emerging as essential tools for navigating their complex compositional space. By fostering cross-disciplinary knowledge transfer and embracing data-driven design, CCMats are poised to deliver next-generation materials solutions that address urgent technological, energy, and&#13;
environmental demands.</abstract>
    <parentTitle language="eng">Current Opinion in Solid State and Materials Science</parentTitle>
    <identifier type="url">https://www.sciencedirect.com/science/article/pii/S1359028626000033?via%3Dihub</identifier>
    <identifier type="issn">1359-0286</identifier>
    <identifier type="doi">10.1016/j.cossms.2026.101256</identifier>
    <identifier type="urn">urn:nbn:de:kobv:b43-655598</identifier>
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    <enrichment key="date_peer_review">09.03.2026</enrichment>
    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Tilmann Hickel</author>
    <author>Anja Waske</author>
    <author>Ali Tehranchi</author>
    <author>Biswajit Bhattacharya</author>
    <author>Tomasz M. Stawski</author>
    <author>Tim-Patrick Fellinger</author>
    <author>Asad Mehmood</author>
    <author>Julia Witt</author>
    <author>Ozlem Ozcan</author>
    <author>Ana Guilherme Buzanich</author>
    <author>Sourabh Kumar</author>
    <author>Rajesh Kumar Mishra</author>
    <author>Marco Holzer</author>
    <author>Andrea Simone Stucchi de Camargo</author>
    <author>Leonardo Agudo Jácome</author>
    <author>Anna Manzoni</author>
    <author>Andrea Fantin</author>
    <author>Elisabeth John</author>
    <author>Vasile-Dan Hodoroaba</author>
    <author>Sophia Bührig</author>
    <author>Jegatheesan Murugan</author>
    <author>Niklas Marschall</author>
    <author>Janine George</author>
    <author>Reza Darvishi Kamachali</author>
    <author>Robert Maaß</author>
    <author>Franziska Emmerling</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Chemically complex materials</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Structural stability</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Functional performance</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Design strategies</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Sustainability</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="">3 Gefahrgutumschließungen; Energiespeicher</collection>
    <collection role="institutes" number="">5 Werkstofftechnik</collection>
    <collection role="institutes" number="">5.1 Mikrostruktur Design und Degradation</collection>
    <collection role="institutes" number="">5.5 Materialmodellierung</collection>
    <collection role="institutes" number="">5.6 Glas</collection>
    <collection role="institutes" number="">6 Materialchemie</collection>
    <collection role="institutes" number="">6.1 Oberflächen- und Dünnschichtanalyse</collection>
    <collection role="institutes" number="">6.2 Material- und Oberflächentechnologien</collection>
    <collection role="institutes" number="">6.3 Strukturanalytik</collection>
    <collection role="institutes" number="">6.4 Materialinformatik</collection>
    <collection role="institutes" number="">6.6 Digitale Materialchemie</collection>
    <collection role="themenfelder" number="">Material</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei für die Öffentlichkeit verfügbar ("Open Access")</collection>
    <collection role="unnumberedseries" number="">Wissenschaftliche Artikel der BAM</collection>
    <collection role="institutes" number="">5.0 Abteilungsleitung und andere</collection>
    <collection role="institutes" number="">6.0 Abteilungsleitung und andere</collection>
    <collection role="themenfelder" number="">Materialdesign</collection>
    <collection role="institutes" number="">3.6 Elektrochemische Energiematerialien</collection>
    <thesisPublisher>Bundesanstalt für Materialforschung und -prüfung (BAM)</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-bam/files/65559/CCmat_perspective_2026.pdf</file>
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  <doc>
    <id>58933</id>
    <completedYear/>
    <publishedYear>2023</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>poster</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Characterization of Solid-State Complexes by XAS</title>
    <abstract language="eng">Atomically dispersed metal-nitrogen doped carbons (M-N-C) are&#13;
promising catalysts for the activation of small molecules such as O2&#13;
and CO2. These single atom catalysts (SAC) operate at the interface&#13;
between homogenous and heterogenous catalysts. Currently, many&#13;
examples of M-N-C are known with good oxygen reduction reaction&#13;
activity but lacking a controlled synthesis of the specific active sites of&#13;
the precatalyst. Recently, our group facilitated the synthesis of pure&#13;
pyrrolic M-N4 sites using Zn ions as imprinters.[1] These amorphous&#13;
materials obtained by active site imprinting method are characterized&#13;
at the BAMline (Bessy II) by X-ray absorption spectroscopy (XAS).&#13;
In-situ/operando measurements will be crucial in future work for a&#13;
better understanding of the dynamic changes of the active site.</abstract>
    <enrichment key="eventName">InSynX Workshop 2023</enrichment>
    <enrichment key="eventPlace">Sao Paulo, Brazil</enrichment>
    <enrichment key="eventStart">06.03.2023</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
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    <author>Simon Dietzmann</author>
    <author>Asad Mehmood</author>
    <author>Ana de Oliveira Guilherme Buzanich</author>
    <author>Franziska Emmerling</author>
    <author>Tim-Patrick Fellinger</author>
    <author>A. Thomas</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Solid-State Complexes</value>
    </subject>
    <collection role="ddc" number="621">Angewandte Physik</collection>
    <collection role="institutes" number="">3 Gefahrgutumschließungen; Energiespeicher</collection>
    <collection role="themenfelder" number="">Energie</collection>
    <collection role="themenfelder" number="">Elektrische Energiespeicher und -umwandlung</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Präsentation</collection>
    <collection role="institutes" number="">3.6 Elektrochemische Energiematerialien</collection>
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