Also available on Google Scholar
C. Mi, J. Saame, A. Heering, X. Zhang, O. Abubakar, I. Leito, and T. W. Hamann, “Universal Reversible Hydrogen Potential for Electrocatalytic Ammonia Splitting Reactions in Nonaqueous Solvents from Unified pH Measurements” Inorganic Chemistry 2025, 64, 32, 16423–16432
C. P. Chen, O. Abubakar, X. Zhang, and T. W. Hamann, “Electrocatalytic Ammonia Oxidation with Coordinatively Saturated Ruthenium Catalyst” Inorganic Chemistry 2025, 64, 27, 13599–13603
Kaushik, S., Adesanya, M., Hamann, T.W.; “Single Component Dye Sensitized Solar Cells Enabled by Copper Chemistry; Introduction of the Retro Cell” Energy & Fuels, 2025 39, 11, 5604–5611 (invited for special edition in honor of Prof. Prashant Kamat)
George, A., Hamann, T.W., Soman, S.; “Impact of Photoanode Thickness on Recombination Dynamics and Indoor Photovoltaic Performance in Dye-sensitized Solar Cells” Energy & Fuels, 2025 39, 10, 4927–4938 (invited for special edition in honor of Prof. Prashant Kamat)
Firestone, E., Staples, R.J., Hamann, T.W.; “Open-Cage Copper Complexes Modulate Coordination and Charge Transfer” Inorganic Chemistry, 2024, 63, 26, 12081–12088
Amtawong, J., Bein, G.P., Montgomery, C.L., Raithel, A.L., Hamann, T.W., Chen, C.H., and Dempsey, J.L.; “Mechanism-Guided Kinetic Analysis of Electrocatalytic Proton Reduction Mediated by a Cobalt Catalyst Bearing a Pendant Basic Site” Journal of the American Chemical Society, 2024, 146, 6, 3742–3754
Chen, C. P., Alharbib, W., Cundari, T.R., Hamann, T.W., and Smith III, M.R.; “Deciphering the Mechanism of Lewis Base Triggered Conversion of Ammonia to Molecular Nitrogen and Methylamine to Cyanide” Journal of the American Chemical Society 2023, 145, 48, 26339–26349
Daemi, S., Kaushik, S., Das, S., Hamann, T.W., Osterloh, F.; “A BiVO4 - liquid junction photovoltaic cell with 0.2% solar energy conversion efficiency” Journal of the American Chemical Society 2023, 145, 47, 25797–25805
Kim, T.Y., Suh, E.H., Firestone, E., Raithel, A.L, Xu, C.Q., Ke, X., Jang, J., McCracken, J., and Hamann, T.W.; “Metal complex molecular solids showing band-like transport driven by in situ ligand exchange” Chemistry of Materials 2023, 35, 17, 6726–6736
Raithel, A.L., Meador, W., Kim, T.Y., Staples, R.J., Delcamp, J., Hamann, T.W.; “Molecular Switch Cobalt Redox Shuttle with a Tunable Hexadentate Ligand” Journal of the American Chemical Society 2023, 145, 2, 1367–1377
Devdass, A., Watson, J., Firestone, E., Hamann, T.W., Delcamp, J.H., Jurss, J.W.; “An Efficient Copper-based Redox Shuttle Bearing a Hexadentate Polypyridyl Ligand for DSCs Under Low-Light Conditions” ACS Applied Energy Materials, 2022, 5, 5964–5973
Mi, C., Ghazfar, R., Smith, M.R., Hamann, T.W.; “Ammonia eurefstics: Electrolytes for liquid energy storage and conversion at room temperature and ambient pressure” Joule 2022, 6, 1–10
Velore, J., Pradhan, S.C., Hamann, T.W., Hagfeldt, A., Unni, K.N.N., Soman, S.; "Understanding Mass Transport in Copper Electrolyte-Based Dye-Sensitized Solar Cells: ACS Applied Energy Materials 2022, 5, 3, 2647–2654
Xiao, Y., Vanka, S., Pham, T.A., Dong, W.J. Sun, Y, Liu, X., Navid, A.N., Varley, J.B., Hajibabaei, H., Hamann, T.W., Ogitsu, T., Mi, Z.; “Crystallographic Effects of GaN Nanostructures in Photoelectrochemical Reaction” Nano Letters 2022, 22, 6, 2236–2243
Kim, T.Y., Kim, B.S., Oh, J.G., Park, S.C., Jang, J., Hamann, T.W., Kang, Y.S., Bang, J.H., Giménez, S., Kang Y.S.; “Interfacial Engineering at Quantum Dot-Sensitized TiO2 Photoelectrodes for Ultrahigh Photocurrent Generation” ACS Applied Materials and Interfaces 2021, 13 (5), 6208–6218
Han, R., Kim, T.Y., Hamann, T.W., Osterloh, F.; “Photochemical Charge Separation and Dye Self-Oxidation Control Performance of Fluorescein, Rose Bengal, and Triphenylamine Dye-Sensitized Solar Cells” Journal of Physical Chemistry 2020 124, 48, 26174–26183
Shadabipour, P., Raithel, A.L., Hamann, T.W.; “Charge Carrier Dynamics at the CuWO4/Electrocatalyst Interface for Photoelectrochemical Water Oxidation” ACS Applied Materials & Interfaces 2020 12, 45, 50592–50599
Vanka, S., Zhou, B. , Awni, R.A., Song, Z., Chowdhury, F.A., Liu, X., Hajibabaei, H., Shi, W., Navid, I.A., Xiao, Y., Pandey, A., Chen, R., Botton, G.A., Hamann, T.W., Wang, D., Yan, Y., Mi, Z.; “An InGaN/Si Double-Junction Photocathode for Unassisted Solar Water Splitting” ACS Energy Letters 2020 5, 12, 3741–3751
Qing, G., Ghazfar, R., Jackowski, S.T., Habibzadeh, F., Maleka Ashtiani, M., Chen, C. Smith, M.R., Hamann, T.W.; “Recent Advances and Challenges of Electrocatalytic N2 Reduction to Ammonia” Chemical Reviews 2020, 120, 12, 5437–5516
Raithel, A.L., Kim, T.Y., Nielsen, K., Staples, R.J., Hamann, T.W.; “Low-Spin Cobalt(II) Redox Shuttle by Isocyanide Coordination” Sustainable Energy & Fuels 2020 4, 2497–2507
Kim, T.Y., Wang, Y., Raithel, A.L., Hamann, T.W.; “Real-Time Observation of the Diffusion Mechanism Progression from Liquid to Solid-State of Transition Metal Complexes” ACS Energy Letters 2020, 5, 2, 583–588
Shadabipour, P., Hamann, T.W.; “Interface Passivation to Overcome Shunting in Semiconductor-Catalyst Junctions” Chemical Communications 2020, 56, 2570–2573
Broadwater, D., Bates, M., Jayaram, M., Young, M., He, J., Raithel, A.L., Hamann, T.W., Zhang, W., Borhan, B., Lunt, R.R., Lunt, S.Y. “Modulating Cellular Cytotoxicity and Phototoxicity of Fluorescent Organic Salts through Counterion Pairing” Scientific reports 2019, 9, 15288
Hajibabaei, H., Little, D.J., Pandey, A., Wang, D., Mi, Z., Hamann, T.W “Direct Deposition of Crystalline Ta3N5 Thin Films on FTO for PEC Water Splitting” ACS Applied Materials & Interfaces 2019, 11 (17), 15457–15466
Qing, G., Hamann, T.W.; “New Electrolytic Devices Produce Ammonia with Exceptional Selectivity” Joule 2019, 3 (3) 634–636
He, Y., Vanka, S., Gao, T., He, D., Espano, J., Zhao, Y., Dong, Q., Lang, C., Wang, Y., Hamann, T.W., Mi, Z., Wang, D. "Dependence of interface energetics and kinetics on catalyst loading in a photoelectrochemical system" Nano Research, 2019, 12 (9) 2378–2384
He, Y., Hamann, T.W., Wang, D.; “Thin film photoelectrodes for solar water splitting” Chemical Society Reviews 2019, 48, 2182–2215
Habib-Zadeh, F., Miller, S.L., Hamann, T.W., Smith, M.R.; “Homogenous Electro-Catalytic Oxidation of Ammonia to N2 Under Mild Conditions” Proceedings of the National Academy of Science 2019, 116 (8) 2849–2853
Wang, Y., Hamann, T.W.; “Improved Performance Induced by in-situ Ligand Exchange Reactions of Copper Bipyridyl Redox Couples in Dye-Sensitized Solar Cells” Chemical Communications 2018, 54, 12361–12364
Baillargeon, J., Xie, Y., Raithel, A.L., Ghaffari, B., Staples, R.J., Hamann, T.W.; “Spin-Doctoring Cobalt Redox Shuttles for Dye-Sensitized Solar Cells” Inorganic Chemistry 2018, 57 (18), 11633–11645
Qiu, J., Hajibabaei, H., Nellist, M.R., Laskowski, F.A.L, Oener, S.Z., Hamann, T.W., Boettcher, S.W.; “Correction to Catalyst Deposition on Photoanodes: The Roles of Intrinsic Catalytic Activity, Catalyst Electrical Conductivity, and Semiconductor Morphology” ACS Energy Letters 2018, 3, 1771–1771
Liu, D., Wang, Q., Elinski, M., Chen, P., Traverse, C.J., Yang, C., Young, M., Hamann, T.W., Lunt, R.R.; “Ultrathin Hole Extraction Layer for Efficient Inverted Perovskite Solar Cells” ACS Omega 2018, 3 (6), 6339–6345
Wang, Q., Jiang, C., Zhang, P., Hamann, T.W.; “Overcoming Bulk Recombination Limits of Layered Perovskite Solar Cells with Mesoporous Substrates” Journal of Physical Chemistry C 2018, 122 (25), 14177–14185
Jiang, C., Xie, Y., Lunt, R.R., Hamann, T.W., Zhang, P.; Elucidating the Impact of Thin Film Texture on Charge Transport and Collection in Perovskite Solar Cells" ACS Omega 2018, 3 (3), 3522–3529
Qiu, J., Hajibabaei, H., Nellist, M.R., Laskowski, F.A.L, Hamann, T.W., Boettcher, S.W.; “Catalyst Deposition on Photoanodes: The Roles of Intrinsic Catalytic Activity, Catalyst Electrical Conductivity, and Semiconductor Morphology” ACS Energy Letters 2018, 3, 961–969
Liu, D., Wang, Q., Traverse, C.J., Yang, C., Young, M., Kuttipillai, P.S., Lunt, S.Y., Hamann, T.W., Lunt, R.R.; “Impact of Ultrathin C60 on Perovskite Photovoltaic Devices” ACS Nano 2018, 12 (1) 876–883
Nellist, M.R., Laskowski, F.A.L., Qiu, J., Hajibabaei, H., Sivula, K., Hamann, T.W., Boettcher, S.W.; “Potential-sensing electrochemical atomic force microscopy enables in-operando analysis of electrocatalysis during (photo)electrochemical water splitting” Nature Energy 2018, 3, 46–52
Hajibabaei, H., Hamann, T.W.; “Selective Electrodeposition of Tantalum(V) Oxide Electrodes” Langmuir 2017, 33 (41), 10800–10806
Farha, O., Hamann, T.W., Martinson, A.B.F., Mulfort, K.; “Material and Interfaces for Energy Related Applications” ACS Applied Materials & Interfaces 2017, 9 (39), 33377–33378
Chu, S., Li, W., Yan, Y., Hamann, T.W., Shih, I., Wang, D., Mi, Z.; “Roadmap on Solar Water Splitting: Current Status and Future Prospects” Nano Futures 2017, 1, 022001
Qiu, J., Hajibabaei, H., Nellist, M.R., Laskowski, F.A.L, Hamann, T.W., Boettcher, S.W.; “Direct in Situ Measurement of Charge Transfer Processes During Photoelectrochemical Water Oxidation on Catalyzed Hematite” ACS Central Science 2017, 3 (9), 1015–1025
Hajibabaei, H., Schon, A.R., Hamann, T.W.; “Interface Control of PEC Water Oxidation Performance with Ni1-xFexOy Modified Hematite Photoanodes” Chemistry of Materials 2017, 29 (16), 6674–6683
Gao, Y., Hamann, T.W.; “Elucidation of CuWO4 Surface States During PEC Water Oxidation” Journal of Physical Chemistry Letters 2017, 8 (12), 2700–2704
Little, D.J., Edwards, D., Smith, M.R., Hamann, T.W.; “As Precious as Platinum: Iron Nitride for Electrocatalytic Oxidation of Liquid Ammonia” ACS Applied Materials & Interfaces 2017, 9 (19), 16228–16235
Baillargeon, J., Xie, Y., Hamann, T.W.; “Bifurcation of Regeneration and Recombination in Dye-Sensitized Solar Cells via Electronic Manipulation of Tandem Cobalt Redox Shuttles” ACS Applied Materials & Interfaces 2017, 9 (39), 33544–33548
Gao, Y., Hamann, T.W.; “Quantitative hole collection for photoelectrochemical water oxidation with CuWO4” Chemical Communications 2017, 53, 1285–1288
Hajibabaei, H., Zandi, O., Hamann, T.W.; “Tantalum Nitride Films Integrated with Transparent Conductive Oxide Substrates via Atomic Layer Deposition for Photoelectrochemical Water Splitting” Chemical Science, 2016, 7, 6760–6767
Zandi, O., Hamann, T.W.; “Determination of Photoelectrochemical Water Oxidation Intermediates on a-Fe2O3 Electrode Surfaces Employing Operando ATR–IR Spectroscopy” Nature Chemistry, 2016, 8, 778–783
Mandal, D., Hamann, T.W.; “Charge distribution in nanostructured TiO2 photoanodes determined by quantitative analysis of the band edge unpinning” ACS Applied Materials & Interfaces 2016, 8 (1), 419–424
Zandi, O., Schon, A.R., Hajibabaei, H., Hamann, T.W.; “Enhanced Charge Separation and Collection in High Performance Electrodeposited Hematite Films” Chemistry of Materials, 2016, 28 (3), 765–771
Gao, Y., Zandi, O., Hamann, T.W.; “Atomic Layer Stack Deposition-Annealing Synthesis of CuWO4” Journal of Materials Chemistry A, 2016, 4, 2826–2830
Xie, Y., Baillargeon, J., Hamann, T.W.; “Regeneration and Recombination Reactions in Dye Sensitized Solar Cells Employing Cobalt Redox Shuttles” Journal of Physical Chemistry C., 2015, 119 (50), 28155–28166
Zandi, O., Hamann, T.W.; “The Potential versus Current State of Water Splitting with Hematite” Physical Chemistry Chemical Physics, 2015, 17, 22485–22503
Little, D.J., Smith, M.R., Hamann, T.W.; “Electrolysis of Liquid Ammonia for Hydrogen Generation” Energy & Environmental Science, 2015, 8, 2775–2781
Mandal, D., Hamann, T.W.; “Energetics of Nanoparticle Semiconductor Electrodes Determined by Spectroelectrochemical Measurements of Free Electrons.” Physical Chemistry Chemical Physics 2015, 17, 11156–11160
Klahr, B., Gimenez, S. Zandi, O., Fabregat-Santiago, F., Hamann, T.W.; “Competitive Photoelectrochemical Methanol and Water Oxidation with Hematite Electrodes.” ACS Applied Materials & Interfaces 2015, 7 (14), 7653–7660
Hamann, T.W.; “Perovskites take lead in solar hydrogen race.” Science 2014, 345, 1566–1567
Young, K.M.H., Hamann, T.W.; “Enhanced photocatalytic water oxidation efficiency with Ni(OH)2 catalysts deposited on α-Fe2O3 via ALD.” Chemical Communications 2014, 50 (63) 8727–8730
Kronawitter, C.X., Zegkinoglou, I., Shen, S.H., Liao, P., Cho, I.S., Zandi, O., Lashgari, K., Westin, G., Guo, J.H., Himpsel, F.J., Carter, E.A., Zheng, X.L., Hamann, T.W., Koel, B.E., Mao, S.S., Vayssieres, L.; “On Theoretical and Experimental Titanium Incorporation into Hematite Nanostructures” Energy and Environmental Science, 2014, 7, 3100–3121
Soman, S., Xie, Y., Hamann, T.W.; “Cyclometalated sensitizers for DSSCs employing cobalt redox shuttles” Polyhedron, 2014, 82, 139–147
Zandi, O., Hamann, T.W.; “Enhanced Photovoltage Through Selective Surface State Removal” Journal of Physical Chemistry Letters 2014, 5 (9), 1522–1526
Klahr, B.M.; Hamann, T.W.; “Water Oxidation on Hematite Photoelectrodes: Insight on the Nature and Identity of Surface States through In-situ Spectroelectrochemistry” Journal of Physical Chemistry C 2014, 118 (19), 10393–10399
Zandi, O., Beardslee, J.A., Hamann, T.W.; “Substrate Dependent Water Splitting with Ultrathin α-Fe2O3 Electrodes” Journal of Physical Chemistry C 2014, 118 (30), 16494–16503
Hamann, T.W.; “Water splitting: An adaptive junction.” Nature Materials 2014, 13, 3–4
Young, M.H., Klahr, B.M., Zandi, O., Hamann, T.W.; “Photocatalytic Water Oxidation with Hematite Electrodes.” Catalysis Science & Technology, 2013, 2013, 3, 1660–1671
Riha, S.C., Klahr, B.M., Tyo, E.C., Seifert, S., Vajda S., Pellin, M.J., Hamann, T.W., Martinson, A.B.F.; “Atomic Layer Deposition of a Sub-monolayer Catalyst for the Enhanced Photoelectrochemical Performance of Water Oxidation with Hematite.” ACS Nano, 2013, 7 (3), 2396–2405
Xie, Y., Hamann, T.W.; “Fast Low Spin Cobalt Complex Redox Shuttles for Dye-Sensitized Solar Cells.” Journal of Physical Chemistry Letters, 2013, 4, 328–332
Zandi, O., Klahr, B.M., Hamann, T.W.; “Highly Photoactive Ti-doped α-Fe2O3 Thin Film Electrodes; Resurrection of the Dead Layer.” Energy and Environmental Science 2013, 6, 634–642
Ondersma, J.W.; Hamann, T.W.; “Recombination and Redox Couples in Dye-Sensitized Solar Cells.” Coordination Chemistry Reviews 2013, 257, 1533–1543
Ondersma, J.W.; Hamann, T.W.; “Conduction Band Energy Determination by Variable Temperature Spectroelectrochemistry.” Energy and Environmental Science 2012, 5 (11), 9476–9480
Klahr, B.M., Gimenez S., Fabregat-Santiago, F., Bisquert, J., Hamann, T.W.; “Photoelectrochemical and Impedance Spectroscopic Investigation of Water Oxidation with “Co-Pi” coated Hematite Electrodes.” Journal of the American Chemical Society 2012, 134 (40), 16693–16700
Hamann, T.W.; “Splitting Water with Rust: Hematite Photoelectrochemistry.” Dalton Transactions, 2012, 41, 7830–7834
Klahr, B.M., Gimenez S., Fabregat-Santiago, F., Bisquert, J., Hamann, T.W.; “Electrochemical and Photoelectrochemical Investigation of Water Oxidation with Hematite Electrodes.” Energy and Environmental Science 2012, 5 (6), 7626–7636
Klahr, B.M., Gimenez S., Fabregat-Santiago, F., Hamann, T.W., Bisquert, J.; “Water oxidation at hematite photoelectrodes: the role of surface states.” Journal of the American Chemical Society 2012, 134 (9), 4294–4302
Hamann, T.W.; “The End of Iodide? Cobalt Complex Redox Shuttles in DSSCs.” Dalton Transactions, 2012, 41 (11), 3111–3115
Ondersma, J.W.; Hamann, T.W.; “Spatially-Resolved Sources of Dark Current in DSSCs.” Langmuir 2011, 27, 13361–13366
Klahr, B.M.; Hamann, T.W.; “Voltage Dependent Photocurrent of Thin Film Hematite Electrodes.” Applied Physics Letters 2011, 99, 063508
Ondersma, J.W.; Hamann, T.W.; “Measurements and Modeling of Recombination from Nanoparticle TiO2 Electrodes.” Journal of the American Chemical Society 2011, 133, 8264–8271
Klahr, B.M.; Hamann, T.W.; “Current and Voltage Limiting Processes in Thin Film Hematite Electrodes.” Journal of Physical Chemistry C 2011, 115, 8393–8399
Klahr, B.M.; Martinson, A.B.F.; Hamann, T.W.; “Photoelectrochemistry of Ultra Thin Film Iron Oxide Electrodes Prepared by Atomic Layer Deposition.” Langmuir 2011, 27 (1), 461–468
Hamann, T.W.; Ondersma, J.W.; “Redox Shuttles in Dye-Sensitized Solar Cells.”Energy and Environmental Science, 2011, 4, 370–381
Ondersma, J.W.; Hamann, T.W.; “Impedance Investigation of Dye-Sensitized Solar Cells Employing Outer-Sphere Redox Shuttles.” Journal of Physical Chemistry C 2010, 114, 638–645
Klahr, B.M.; Hamann, T.W.; “Performance Enhancement and Limitations of Cobalt Dipyridyl Redox Shuttles in Dye-Sensitized Solar Cells.” Journal of Physical Chemistry C 2009, 113, 14040–14045 Postdoctoral Work
Hamann, T.W.; Farha O.K.; M.; Hupp, J.T.; “Outer-sphere Redox Couples as Shuttles in Dye-Sensitized Solar Cells. Performance Enhancement Based on Photoelectrode Modification via Atomic Layer Deposition.” Journal of Physical Chemistry C 2008, 112, 19756–19764
Hamann, T.W.; Jensen, R.A.; Martinson, A.B.F.; Van Ryswyk H.; Hupp, J.T.; “Advancing beyond current generation dye-sensitized solar cells.” Energy and Environmental Science 2008, 1, 66–78
Hamann, T.W.; Martinson, A.B.F.; Pellin, M.; Hupp, J.T.; “Novel TiO2 Nanostructured Photoanodes in Dye-Sensitized Solar Cells.” Journal of Physical Chemistry C 2008, 112, 10303–10307
Hamann, T.W.; Martinson, A.B.F.; Pellin, M.; Hupp, J.T.; “Aerogel templated ZnO Dye-Sensitized Solar Cells.” Advanced Materials 2008, 20, 1560–1564
Martinson, A.B.F.; Hamann, T.W.; Pellin, M.; Hupp, J.T.; “Alternative Photoanode Architectures for Dye-Sensitized Solar Cells.” Chemistry – A European Journal 2008, 14, 4458–4467 Graduate Work
Hamann, T.W.; Brunschwig, B. S.; Lewis, N. S.; “A Comparison of the Self-Exchange and Interfacial Charge-Transfer Rate Constants for Methyl vs. t-Butyl Substituted Os(III) Polypyridyl Complexes.” Journal of Physical Chemistry B 2006, 110, 25514–2552
Hamann, T.W.; Lewis, N. S.; “Control of the Stability, Electron-Transfer Kinetics, and pH-Dependent Energetics of Si/H2O Interfaces Through Methyl Termination of Si(111) Surfaces” Journal of Physical Chemistry B 2006, 110, 22291–22294
Royea, W.J.; Hamann, T.W.; Brunschwig, B. S.; Lewis, N. S.; “A Comparison Between Interfacial Electron-Transfer Rate Constants at Metallic and Graphite Electrodes.” Journal of Physical Chemistry B 2006, 110, 19433–19442
Hamann, T.W.; Gstrein, F.; Brunschwig, B. S.; Lewis, N. S.; “Measurement of the Driving Force Dependence of Interfacial Charge-Transfer Rate Constants in Response to pH Changes at n-ZnO/H2O Interface.” Chemical Physics 2006, 326, 13–26
Hamann, T.W.; Srivatsan, N.; Van Willigen, H.; “Time-Resolved EPR Study of the Photophysics and Photochemistry of 1-(3-(Methoxycarbonyl)Propyl)-1-Phenyl6.6C61” Journal of Physical Chemistry A 2005, 109, 11665–11672
Hamann, T.W.; Gstrein, F.; Brunschwig, B. S.; Lewis, N. S.; “Measurement of the Dependence of Interfacial Charge-Transfer Rate Constants on the Reorganization Energy of Redox Species at n-ZnO/H2O Interfaces.” Journal of the American Chemical Society 2005, 127, 13949–13954
Hamann, T.W.; Gstrein, F.; Brunschwig, B. S.; Lewis, N. S.; “Measurement of the Free Energy Dependence of Interfacial Charge-Transfer Rate Constants Using ZnO/H2O Semiconductor/Liquid Contacts.” Journal of the American Chemical Society 2005, 127, 7815–7824
