Xin Liu

• Liu, Xin; Risbakk, Sanne; Almeida Carvalho, Patricia; Yang, Mingyi; Backe, Paul Hoff & Bjørås, Magnar [Show all 8 contributors for this article] (2022). Immobilization of FeFe-hydrogenase on black TiO2 nanotubes as biocathodes for the hydrogen evolution reaction. Electrochemistry communications. ISSN 1388-2481. 135. doi: 10.1016/j.elecom.2022.107221. Full text in Research Archive
• Touni, Aikaterini; Liu, Xin; Kang, Xiaolan; Almeida Carvalho, Patricia; Diplas, Spyridon & Both, Kevin Gregor [Show all 8 contributors for this article] (2021). Galvanic Deposition of Pt Nanoparticles on Black TiO2 Nanotubes for Hydrogen Evolving Cathodes. ChemSusChem. ISSN 1864-5631. 14(22), p. 4993–5003. doi: 10.1002/cssc.202101559. Full text in Research Archive
• Han, Donglin; Liu, Xin; Bjørheim, Tor Svendsen & Tetsuya, Uda (2021). Yttrium‐Doped Barium Zirconate‐Cerate Solid Solution as Proton Conducting Electrolyte: Why Higher Cerium Concentration Leads to Better Performance for Fuel Cells and Electrolysis Cells. Advanced Energy Materials. ISSN 1614-6832. 11(8). doi: 10.1002/aenm.202003149.
• Liu, Xin; Almeida Carvalho, Patricia; Getz, Marit Norderhaug; Norby, Truls Eivind & Chatzitakis, Athanasios Eleftherios (2019). Black Anatase TiO2 Nanotubes with Tunable Orientation for High Performance Supercapacitors. Journal of Physical Chemistry C. ISSN 1932-7447. 126(36), p. 21391–21940. doi: 10.1021/acs.jpcc.9b05070.
• Grini, Sigbjørn; Sopiha, Kostiantyn; Ross, Nils; Liu, Xin; Bjørheim, Tor Svendsen & Platzer-Björkman, Charlotte [Show all 8 contributors for this article] (2019). Strong Interplay between Sodium and Oxygen in Kesterite Absorbers: Complex Formation, Incorporation, and Tailoring Depth Distributions. Advanced Energy Materials. ISSN 1614-6832. 9(27), p. 1–9. doi: 10.1002/aenm.201900740. Full text in Research Archive
• Liu, Xin; Bjørheim, Tor Svendsen; Vines, Lasse; Fjellvåg, Øystein; Granerød, Cecilie Skjold & Prytz, Øystein [Show all 10 contributors for this article] (2019). Highly Correlated Hydride Ion Tracer Diffusion in SrTiO3–xHx Oxyhydrides. Journal of the American Chemical Society. ISSN 0002-7863. 141(11), p. 4653–4659. doi: 10.1021/jacs.8b12985. Full text in Research Archive
• Liu, Xin; Zhang, Jie; Huang, Chongpin & Sun, Xiuliang (2018). Density Functional Theory Study of Cu-ZSM-5-Catalyzed C-H Bond Activation: The Importance of Active Centers. Journal of Physical Chemistry C. ISSN 1932-7447. 122(50), p. 28645–28651. doi: 10.1021/acs.jpcc.8b08137.
• Liu, Xin; Bjørheim, Tor Svendsen & Haugsrud, Reidar (2018). Formation of defects and their effects on hydride ion transport properties in a series of K2NiF4-type oxyhydrides. Journal of Materials Chemistry A. ISSN 2050-7488. 6(4), p. 1454–1461. doi: 10.1039/c7ta08435h.
• Sun, Xinwei; Xu, Kaiqi; Fleischer, Christian; Liu, Xin; Grandcolas, Mathieu & Strandbakke, Ragnar [Show all 9 contributors for this article] (2018). Earth-abundant electrocatalysts in proton exchange membrane electrolyzers. Catalysts. ISSN 2073-4344. 8:657(12), p. 1–41. doi: 10.3390/catal8120657. Full text in Research Archive Show summary

  In order to adopt water electrolyzers as a main hydrogen production system, it is critical to develop inexpensive and earth-abundant catalysts. Currently, both half-reactions in water splitting depend heavily on noble metal catalysts. This review discusses the proton exchange membrane (PEM) water electrolysis (WE) and the progress in replacing the noble-metal catalysts with earth-abundant ones. The efforts within this field for the discovery of efficient and stable earth-abundant catalysts (EACs) have increased exponentially the last few years. The development of EACs for the oxygen evolution reaction (OER) in acidic media is particularly important, as the only stable and efficient catalysts until now are noble-metal oxides, such as IrOx and RuOx. On the hydrogen evolution reaction (HER) side, there is significant progress on EACs under acidic conditions, but there are very few reports of these EACs employed in full PEM WE cells. These two main issues are reviewed, and we conclude with prospects for innovation in EACs for the OER in acidic environments, as well as with a critical assessment of the few full PEM WE cells assembled with EACs.

• Liu, Xin; Bjørheim, Tor Svendsen & Haugsrud, Reidar (2017). Formation and migration of hydride ions in BaTiO3-xHx oxyhydride. Journal of Materials Chemistry A. ISSN 2050-7488. 5(3), p. 1050–1056. doi: 10.1039/c6ta06611a.
• Løken, Andreas; Saeed, Sarmad Waheed; Norderhaug, Marit; Liu, Xin & Bjørheim, Tor Svendsen (2016). Alkali metals as efficient A-site acceptor dopants in proton conducting BaZrO3. Journal of Materials Chemistry A. ISSN 2050-7488. 4(23), p. 9229–9235. doi: 10.1039/c6ta01446a. Full text in Research Archive
• Liu, Xin; Bjørheim, Tor Svendsen & Haugsrud, Reidar (2016). Thermochemical properties of rare-earth oxyhydrides from first principles phonon calculations. RSC Advances. ISSN 2046-2069. 6(12), p. 9822–9826. doi: 10.1039/c5ra26552e.

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• Polfus, Jonathan; Småbråten, Didrik Rene & Liu, Xin (2022). Linking Atomistic and Electrochemical Modelling of Proton Ceramic Electrochemical Cells.
• Liu, Xin (2021). Microkinetic study on NH3 cracking in a protonic electrochemical cell.
• Thoreton, Vincent; Liu, Xin; Li, Zuoan & Haugsrud, Reidar (2021). Effect of water vapour on the oxygen surface exchange kinetics of CaTi0.9Fe0.1O3-δ.
• Touni, Aikaterini; Liu, Xin; Chatzitakis, Athanasios Eleftherios; Kang, Xiaolan; Spyridou, Olga & Sotiropoulos, Sotiris (2021). Platinized Black Titania Nanotube HER Cathodes prepared by the Galvanic Deposition Method at CaH2-reduced Titania Nanotubes.
• Thoreton, Vincent; Liu, Xin; Li, Zuoan; Bjørheim, Tor Svendsen & Haugsrud, Reidar (2020). Surface exchange kinetics of CaTi0.9Fe0.1O3-δ.
• Liu, Xin; Risbakk, Sanne; Almeida Carvalho, Patricia; Yang, Mingyi; Backe, Paul Hoff & Bjorås, Magnar [Show all 8 contributors for this article] (2020). Hydrogenase-assisted catalysis on titania electrode oxides.
• Norby, Truls Eivind; Liu, Xin; Bjørheim, Tor Svendsen & Haugsrud, Reidar (2019). Hydride ion conduction.
• Thoréton, Vincent; Bjørheim, Tor Svendsen; Liu, Xin; Li, Zuoan & Haugsrud, Reidar (2019). Influence of water vapour on the surface exchange kinetics of functional oxides.
• Li, Zuoan; Liu, Xin & Haugsrud, Reidar (2019). Dissociation of oxygen on oxides determined by a modified gas phase analysis (GPA).
• Liu, Xin; Chatzitakis, Athanasios Eleftherios; Almeida Carvalho, Patricia; Risbakk, Sanne; Yang, Mingyi & Backe, Paul Hoff [Show all 7 contributors for this article] (2019). Enzyme-assisted Catalysis on Titania Electrodes.
• Liu, Xin; Chatzitakis, Athanasios Eleftherios; Almeida Carvalho, Patricia; Backe, Paul Hoff; Yang, Mingyi & Bjørås, Magnar [Show all 7 contributors for this article] (2018). Enzyme-assisted Catalysis on Black Titania Electrodes.
• Grini, Sigbjørn; Ross, Nils; Sopiha, Kostiantyn; Liu, Xin; Persson, Clas & Platzer-Björkman, Charlotte [Show all 7 contributors for this article] (2018). Introduction of oxygen into kesterite processing.
• Grini, Sigbjørn; Ross, Nils; Liu, Xin; Platzer-Björkman, Charlotte; Persson, Clas & Vines, Lasse (2018). How is oxygen introduced in Cu2ZnSnS4 solar cell processing?
• Liu, Xin; Bjørheim, Tor Svendsen & Haugsrud, Reidar (2016). Hydride migration and electron localization in BaTiO3-xHx oxyhydride .
• Løken, Andreas; Saeed, Sarmad Waheed; Norderhaug, Marit; Liu, Xin & Bjørheim, Tor Svendsen (2016). Alkali metals as efficient A-site acceptor dopants in proton conducting BaZrO3 .
• Fjellvåg, Øystein Slagtern; Fjellvåg, Helmer; Liu, Xin; Haugsrud, Reidar & Sjåstad, Anja Olafsen (2015). Hydride oxides with perovskite related structure: Case study of La2LiHO3.
• Liu, Xin; Haugsrud, Reidar; Bjørheim, Tor Svendsen & Fjellvåg, Helmer (2018). Defect, Stability and Transport in Oxyhydrides. Universitetet i Oslo. ISSN 1501-7710.

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