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| 1 | Towards maximized utilization of iridium for the acidic oxygen evolution reaction显示文摘The reduction in noble metal content for efficient oxygen evolution catalysis is a crucial aspect towards the large scale commercialisation of polymer electrolyte membrane electrolyzers.Since catalytic stability and activity are inversely related,long service lifetime still demands large amounts of low-abundant and expensive iridium.In this manuscript we elaborate on the concept of maximizing the utilisation of iridium for the oxygen evolution reaction.By combining different tin oxide based support materials with liquid atomic layer deposition of iridium oxide,new possibilities are opened up to grow thin layers of iridium oxide with tuneable noble metal amounts.In-situ,time-and potential-resolved dissolution experiments reveal how the stability of the substrate and the catalyst layer thickness directly affect the activity and stability of deposited iridium oxide.Based on our results,we elaborate on strategies how to obtain stable and active catalysts with maximized iridium utilisation for the oxygen evolution reaction and demonstrate how the activity and durability can be tailored correspondingly.Our results highlight the potential of utilizing thin noble metal films with earth abundant support.materials for future catalytic applications in the energy sector. | Marc Ledendecker Simon Geiger Katharina Hengge Joohyun Lim Serhiy Cherevko Andrea M. Mingers Daniel Gohl Guilherme V. Fortunato Daniel Jalalpoor Ferdi Schuth Christina Scheu Karl J. J. Mayrhofer | 2019 | Nano Research2019，12，9： | 6 |
| 2 | Tribological Properties of Nanocomposite CrC x /a-C:H Thin Films显示文摘 | Gert Gassner J?rg Patscheider Paul H. Mayrhofer Saso ?turm Christina Scheu Christian Mitterer | 2007 | Tribology Letters2007，，1： | 1 |
| 3 | Deformation and fracture mechanisms of Al2O3/Nb/Al2O3composites under compression显示文摘 | Zhang ZheFeng Brunner Dieter Scheu Christina | 2005 | Materials Research and Advanced Techniques2005，96，1： | 1 |
| 4 | On the overaging behaviour of tool steel X38 CrMoV 5-3显示文摘 | Michael Bischof Peter Staron Devrim Caliskanoglu Harald Leitner Christina Scheu Helmut Clemens | 2007 | Materials Science & Engineering A2007，，1： | 1 |
| 5 | Enhanced thermoelectric properties of NbCoSn half-Heuslers through in-situ nanocrystallization of amorphous precursors during the consolidation process显示文摘Tailoring nanostructures is a general approach used to obtain enhanced thermoelectric properties for halfHeusler compounds because the wide areas of grain and phase boundaries could be scattering centers that lower lattice thermal conductivity.However,a common fabrication method based on the sintering of crystalline precursors crushed from as-cast alloy ingots has limitations in obtaining a homogeneous microstructure without microsized impurity phases,owing to residual elemental segregation from casting.In this study,we used amorphous NbCoSn alloys as a precursor for the sintered specimen to obtain a homogeneous NbCoSn bulk specimen without microsized impurity phases and segregation,which led to the enhanced Seebeck coefficient due to the high purity of the half-Heusler phase after crystallization.Moreover,superplasticity originating from amorphous features enabled the powders to be largely deformed during the sintering process,even at a low sintering temperature(953 K).This resulted in less oxidation at both,the grain boundary and the interior,as the O diffusion pathway was blocked during the sintering process.As a result,the NbCoSn0.95Sb0.05 specimen using an amorphous precursor exhibited an enhanced zT of 0.7,due to the increase in the power factor and a decrease in lattice thermal conductivity compared to the specimen using a crystalline precursor. | Chanwon Jung Kyuseon Jang Hail Park Jeongin Jang Hanhwi Jang Byungchul Kang Kitae Park Siyuan Zhang Ruben Bueno Villoro SuDong Park Ho Jin Ryu Yeon Sik Jung Min-Wook Oh Christina Scheu Seong-Hoon Yi Pyuck-Pa Choi | 2023 | Journal of Materials Science & Technology2023，，34： | 0 |
| 6 | Interfacial Electronic Structure of Thin Cu Films Grown on Ar^+-ion Sputter-cleaned α-Al_2O_3 Substrates显示文摘The bonding and electronic structure of Cu/(0001)Al2O3 and Cu/(1120)Al2O3 interfaces has been studied experimentally using spatially-resolved transmission electron energy loss spectroscopy. The specimen were prepared by depositing Cu on single-crystal α-AI2O3 substrates, which have been Ar+-ion sputter-cleaned prior to the growth of Cu. For both orientations of the α-Al2O3 substrate, atomically abrupt interfaces formed as determined by high-resolution transmission electron microscopy. The investigations of the interfacial Cu-L2,3, Al-L2,3 and 0-K energy loss near-edge structures, which are proportional to the site- and angular-momentum-projected unoccupied density of states above the Fermi level, indicate the existence of metallic Cu-AI bonds at the Cu/AI2O3 interface independent of the substrate orientation. | Christina Scheu, Min Gao and Manfred RuhleMax-Planck-Institut fur Metallforschung, Seestr. 92, 70174 Stuttgart, Germany | 2002 | Journal of Materials Science & Technology2002，18，2： | 0 |
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