2019


    論文: Research papers

  • ・ K. Daisuke, S. Kaneko, R. Myochi, Y. Chida, N. Todoroki, T. Tanabe, T. Wadayama, "Ligand-effect-induced Oxygen Reduction Reaction Activity Enhancement for Pt/Zr/Pt(111) Surfaces with Tensile Strain Relieved by Stacking Faults", ACS Applied Energy Materials, 2 (2019) 4597-4601. DOI:10.1021/acsaem.9b00873
  • ・ N. Todoroki, H. Tei, T. Miyakawa, H. Tsurumaki, T. Wadayama, "Electrochemical CO2 Reduction on Bimetallic Surface Alloys: Enhanced Selectivity to CO for Co/Au(110) and to H2 for Sn/Au(110)", ChemElectroChem, 6 (2019) 3101-3107. DOI:10.1002/celc.201900725R1
  • ・ S. Takahashi, N. Todoroki, R. Myochi, T. Nagao, N. Taguchi, T. Ioroi, F. E. Feiten, Y. Wakisaka, K. Asakura, O. Sekizawa, T. Sakata, K. Higashi, Y. Iwasawa, T. Wadayama, "Effective Surface Termination with Au on PtCo@Pt Core-Shell Nanoparticle: Microstructural Investigations and Oxygen Reduction Reaction Properties", Journal of Electroanalytical Chemistry, 842 (2019) 1-7. DOI: 10.1016/j.jelechem.2019.04.053
  • ・ N. Todoroki, R. Sasakawa, K. Kusunoki, T. Wadayama,"Oxygen Reduction Reaction Activity of Nano-Flake Carbon-Deposited Pt75Ni25(111) Surfaces", Electrocatalysis, 10 (2019) 232-242. DOI: 10.1007/s12678-019-00517-6
  • ・ N. Todoroki, H. Tei, H. Tsurumaki, T.Miyakawa, T. Inoue and T. Wadayama,"Surface Atomic Arrangement Dependence of Electrochemical CO2 Reduction on Gold: Online Electrochemical Mass Spectrometric Study on Low-Index Au(hkl) Surfaces", ACS Catalysis, 9, 2019, 1383-1388. DOI:10.1021/acscatal.8b04852

解説記事

  • ・ 轟直人, "表面科学的視点に基づくエネルギー・物質変換触媒の開発", まてりあ, 58 (2019) 328-332. DOI: 10.2320/materia.58.328
  • ・ 轟直人, 和田山智正, "東北大学環境材料表面科学研究室-電極触媒モデルのドライプロセス合成と評価-", 燃料電池, 18 (2019) 82-86. 掲載WEBページ(目次のみ)



2018


  • 1. 金子聡真, 妙智力也, 渡邉裕文, 番土陽平, 高橋俊太郎, 轟直人, 田邉匡生, 和田山智正,"歪み制御した単結晶Ptシェルの酸素還元反応活性", 燃料電池, 18, 2018, pp. 73-79. https://www.fcdic.com/pdf/toukouronbun/toukou24.pdf
  • 2. N. Todoroki and T. Wadayama,"Oxygen Reduction Reaction Activity for Cobalt-Deposited Pt(111) Model Catalyst Surfaces in Alkaline Solution", Electrochemistry, 86, 2018, pp. 243-245. DOI:10.5796/electrochemistry.18-00024
  • 3. N. Todoroki, R. Kawamura, M. Asano, R. Sasakawa, S. Takahashi and T. Wadayama, "Alloy-composition-dependent oxygen reduction reaction activity and electrochemical stability of Pt-based bimetallic systems: a model electrocatalyst study of Pt/PtxNi100−x(111)", Physical Chemistry Chemical Physics, 20, 2018, pp. 11994-12004. DOI:10.1039/C8CP01217B
  • 4. H. Tsurumaki, T. Mochizuki, H. Tei, N. Todoroki and T. Wadayama,"Rotating Disk Electrode – Online Electrochemical Mass Spectrometry for Oxygen Reduction Reaction on Pt Electrode Surfaces", ECS Transactions, 86(13), 2018, pp. 447-452.
  • 5. R. Myochi, T. Nagao, Y. Fugane, S. Takahashi, N. Todoroki and T. Wadayama,"Oxygen Reduction Reaction Properties for Dry-Process Synthesized Pt/TaCx Nanoparticles", ECS Transactions, 86(13), 2018, pp. 519-524.
  • 6. M. Watanabe, J. Moon, T. Tanabe, N. Todoroki and T. Wadayama,"Oxygen Reduction Reaction Properties of Dry-Process-Synthesized Pt/graphene/SiC(0001) Model Catalyst Surfaces", ECS Transactions, 86(13), 2018, pp. 525-530.
  • 7. N. Todoroki and T. Wadayama,"Oxygen Reduction and Oxygen Evolution Reaction Activity on Co/Pt(111) Surfaces in Alkaline Solution", ECS Transactions, 86(13), 2018, pp. 569-574.



2017


  • 1. S. Kaneko, R. Myochi, S. Takahashi, N. Todoroki, T. Wadayama, and T. Tanabe, "Ultrahigh Vacuum Synthesis of Strain-Controlled Model Pt(111)-Shell Layers: Surface Strain and Oxygen Reduction Reaction Activity", The Journal of the Physical Chemistry Letters, 8, 2017, pp. 5360-5365. http://dx.doi.org/10.1021/acs.jpclett.7b02525
  • 2. N. Todoroki, Y. Bando, Y. Tani, S. Kaneko, H. Watanabe, S. Takahashi and T. Wadayama, "Electrochemical Stability of Pt/Pd(111) Model Core-Shell Structure in 80°C Perchloric Acid", Journal of the Electrochemical Society, 164, 2017, pp. F908-F910. http://jes.ecsdl.org/content/164/9/F908.abstract
  • 3. 特許: 特願2017-203904, "ナノ粒子およびナノ粒子の製造方法”



2016


  • 1. S. Takahashi, N. Takahashi, N. Todoroki, T. Wadayama, "Dealloying of Nitrogen-Introduced Pt–Co Alloy Nanoparticles: Preferential Core–Shell Formation with Enhanced Activity for Oxygen Reduction Reaction", ACS Omega, 1, 2016, pp. 1247-1252. http://dx.doi.org/10.1021/acsomega.6b00412
  • 2. N. Todoroki, H. Watanabe, T. Kondo, S. Kaneko, T. Wadayama, "Highly Enhanced Oxygen Reduction Reaction Activity and Electrochemical Stability of Pt/Ir(111) Bimetallic Surfaces", Electrochimica Acta, 222, 2016, pp. 1616–1621 http://dx.doi.org/10.1016/j.electacta.2016.11.149 .
  • 3. N. Todoroki, Y. Bando, H. Watanabe, Y. Tani, T. Wadayama, "ORR activity and electrochemical stability for well-defined topmost and interface structures of the Pt/Pd(111) bimetallic system", Electrochimica Acta, 212, 2016, pp. 822-827. http://dx.doi.org/10.1016/j.electacta.2016.07.068 .
  • 4. M. Asano, R. Kawamura, R. Sasakawa, N. Todoroki, T. Wadayama, "Oxygen Reduction Reaction Activity for Strain-Controlled Pt-Based Model Alloy Catalysts: Surface Strains and Direct Electronic Effects Induced by Alloying Elements", ACS Catalysis, 6, 2016, pp. 5285-5289. http://dx.doi.org/10.1021/acscatal.6b01466
  • 5. N. Todoroki, N. Yokota, S. Nakahata, H. Nakamura, T. Wadayama, "Electrochemical Reduction of CO2 on Ni- and Pt-Epitaxially Grown Cu(111) Surfaces" , Electrocatalysis, 7 (1), 2016, pp. 97-103. DOI:10.1007/s12678-015-0286-6
  • 6. S. Takahashi, N. Takahashi, N. Todoroki, T. Tanabe, T. Wadayama, "Oxygen Reduction Reaction Activity and Durability for Pt/TaNx Model Catalysts Fabricated in Ultra-High-Vacuum" , ECS Transactions, 75 (14), 2016, pp. 821-826.
  • 7. M. Asano, R. Kawamura, N. Todoroki, T. Wadayama, "ORR Properties for Model Pt-Shell Layers Prepared on Nitrogen-Beam Irradiated Pt25Ni75(111) Substrate" , ECS Transactions, 75 (14), 2016, pp. 809-814.
  • 8. N. Todoroki, Y. Bando, Y. Tani, S. Kaneko, H. Watanabe, T. Wadayama, "Surface Structures and Electrochemical Stabilities for Pt/Pd(111) Model Electrocatalysts" , ECS Transactions, 75 (14), 2016, pp. 741-746.
  • 9. H. Nakamura, T. Inoue, T. Matsuda, N. Todoroki, T. Wadayama, "On-Line Mass Spectrometry for Ethanol Oxidation on Well-Defined Sn/Pt(hkl) Electrode Surfaces" , ECS Transactions, 75 (14), 2016, pp. 1029-1033.
  • 10. H. Watanabe, S. Kaneko, N. Todoroki, T. Wadayama, "Oxygen Reduction Reaction Activity and Durability for Model Pt Shell Layers on Ir(111) Prepared by Molecular Beam Epitaxy" , ECS Transactions, 75 (14), 2016, pp. 815-820.



2015


  • 1. M. Asano, R. Kawamura, N. Todoroki, T. Wadayama, "Oxygen reduction reaction activities for various-monolayer-thick Pt shells on PtxNi100-x(111)",  ECS Transactions, 69 (17), 2015, pp. 619-624.
  • 2. S. Takahashi, H. Chiba, N. Todoroki, T. Wadayama, "Electrochemical structural stability of au-modified Pt nanoparticles prepared by arc-plasma deposition", ECS Transactions, 69 (17), 2015, pp. 657-661.
  • 3. N. Todoroki, Y. Bando, H. Watanabe, T. Wadayama, "Effects of core-shell interface structures on ORR activities: A model catalyst study of Pt/Pd(111)", ECS Transactions, 69 (17), 2015, pp. 315-320.
  • 4. S. Takahashi, H. Chiba, T. Kato, S. Endo, T. Hayashi, N. Todoroki, T. Wadayama, "Oxygen reduction reaction activity and structural stability of Pt-Au nanoparticles prepared by arc-plasma deposition", Physical Chemistry Chemical Physics, 17, 2015, pp. 18638-18644. http://dx.doi.org/10.1039/C5CP02048D
  • 5. N. Todoroki, T. Kato, T. Hayashi, S.Takahashi, T. Wadayama, "Pt–Ni Nanoparticle-Stacking Thin Film: Highly Active Electrocatalysts for Oxygen Reduction Reaction", ACS catalysis, 5, 2015, pp. 2209-2212. http://dx.doi.org/10.1021/acscatal.5b00065
  • 6. Y. Bando, Y. Takahashi, E. Ueta, N. Todoroki, T. Wadayama, "Electrochemical Properties of Pt Epitaxial Layers Formed on Pd(111) in Ultra-High Vacuum", Journal of the Electrochemical Society, 162, 2015, pp. F463-F467. DOI:10.1149/2.0951504jes
  • 7. 轟直人, 和田山智正, "超高真空中で作製したPt基合金モデル単結晶触媒の酸素還元反応活性", Electrochemistry, 83 (2), 2015, pp. 101-105. https://doi.org/10.5796/electrochemistry.83.101



2014


  • 1. N. Todoroki, T. Dasai, Y. Asakimori, T. Wadayama, "Microscopic surface structures and ORR activities for vacuum-deposited Pt/Ni/Pt(1 1 1) and Pt/Ni/Pt(1 1 0) sandwich structures", Journal of Electroanalytical Chemistry, 724, 2014, pp. 15-20. https://doi.org/10.1016/j.jelechem.2014.04.008
  • 2. N. Todoroki, Y. Iijima, Y. Takahashi, T. Kondo, Y. Asakimori, Y. Bando, T. Wadayama, "Electrochemical Properties for UHV-Prepared Pt/M Well-Defined Single Crystal Surfaces", ECS Transactions, 64 (3), 2014, pp. 63-74.



2013


  • 1. N. Todoroki, Y. Asakimori, T. Wadayama, "Effective shell layer thickness of platinum for oxygen reduction reaction alloy catalysts" , Physical Chemistry Chemical Physics, 15 (41), 2013, pp. 17771-17774. http://dx.doi.org/10.1039/C3CP53340A
  • 2. N. Todoroki, Y. Iijima, R. Takahashi, Y. Asakimori, T. Wadayama, "Structure and electrochemical stability of Pt-enriched Ni/Pt(111) topmost surface prepared by molecular beam epitaxy", Journal of the Electrochemical Society, 160 (6), 2013, pp. F591-F596. DOI:10.1149/2.082306jes
  • 3. N. Todoroki, R. Takahashi, Y. Iijima, Y. Yamada, T. Hayashi, T. Wadayama, "Platinum-enriched Ni/Pt(111) surfaces prepared by molecular beam epitaxy: Oxygen reduction reaction activity and stability", Materials Transactions, 54 (9), 2013, pp. 1735-1740. DOI:10.2320/matertrans.M2013061
  • 4. N. Todoroki, Y. Asakimori, T. Wadayama, "Oxygen reduction reaction activity of Pt/Ni/Pt(111) well-defined model catalyst surfaces", ECS Transactions, 58 (1), 2013, pp. 565-573.
  • 5. Y. Yamada, K. Miyamoto, T. Hayashi, Y. Iijima, N. Todoroki, T. Wadayama, "Oxygen reduction reaction activities for Pt-enriched Co/Pt(111), Co/Pt(100), and Co/Pt(110) model catalyst surfaces prepared by molecular beam epitaxy", Surface Science, 607, 2013, pp. 54-60. https://doi.org/10.1016/j.susc.2012.08.016
  • 6. Y. Iijima, T. Takayuki, Y. Takahashi, Y. Bando, N. Todoroki, T. Wadayama, "Oxygen Reduction Reaction Activities for Pt/Au(hkl) Bimetallic Surfaces Prepared by Molecular Beam Epitaxy", Journal of the Electrochemical Society, 160, 2013, pp. F898-F904. DOI:10.1149/2.011309jes



2012


  • 1. N. Todoroki, Y. Iijima, R. Takahashi, Y. Yamada, K. Matsumoto, T. Hayashi, T. Wadayama, "Electrochemical stability of pt-enriched topmost surface of Ni/Pt(111) prepared by molecular beam epitaxy", ECS Transactions, 50 (2), 2012, pp. 1707-1713.
  • 2. Y. Iijima, Y. Takahashi, K. Matsumoto, N. Todoroki, T. Wadayama, "ORR activity enhancement of MBE-prepared Pt monolayer on Au single-crystal substrate", ECS Transactions, 50 (36), 2012, pp. 45-55.
  • 3. Y. Iijima, Y. Takahashi, K.-I. Matsumoto, T. Hayashi, N. Todoroki, T. Wadayama, "Oxygen reduction reaction activities of Pt/Au(1 1 1) surfaces prepared by molecular beam epitaxy", Journal of Electroanalytical Chemistry, 685, 2012, pp. 79-85. http://dx.doi.org/10.1016/j.jelechem.2012.09.007



2011


  • 1. T. Wadayama, H. Yoshida, K. Ogawa, N. Todoroki, Y. Yamada, K. Miyamoto, Y. Iijima, T. Sugawara, K. Arihara, S. Sugawara, K. Shinohara, "Outermost surface structures and oxygen reduction reaction activities of Co/Pt(111) bimetallic systems fabricated using molecular beam epitaxy", Journal of Physical Chemistry C, 115 (38), 2011, pp. 18589-18596. http://pubs.acs.org/doi/abs/10.1021/jp203845u



2010


  • 1. T. Wadayama, N. Todoroki, Y. Yamada, T. Sugawara, K. Miyamoto, Y. Iijama, "Oxygen reduction reaction activities of Ni/Pt(111) model catalysts fabricated by molecular beam epitaxy", Electrochemistry Communications, 12 (8), 2010, pp. 1112-1115. https://doi.org/10.1016/j.elecom.2010.05.042
  • 2. T. Wadayama, H. Yoshida, K. Ogawa, N. Todoroki, Y. Yamada, "Carbon monoxide adsorption on Co deposited Pt(1 0 0)-hex: IRRAS and LEED investigations", Applied Surface Science, 256 (14), 2010, pp. 4517-4521. https://doi.org/10.1016/j.apsusc.2010.02.039
  • 3. H. Yoshida, K. Ogawa, N. Todoroki, Y. Yamada, "Carbon monoxide adsorption on cobalt-deposited platinum single crystal surfaces investigated by IR reflection-absorption and low-energy electron diffraction", e-Journal of Surface Science and Nanotechnology, 8, 2010, pp. 161-166. https://doi.org/10.1380/ejssnt.2010.161



2009


  • 1. N. Todoroki, H. Osano, T. Maeyama, H. Yoshida, T. Wadayama, "Infrared reflection absorption spectral study for CO adsorption on Pd/Pt(1 1 1) bimetallic surfaces", Applied Surface Science, 256 (4), 2009, pp. 943-947. http://dx.doi.org/10.1016/j.apsusc.2009.05.070
  • 2. T. Wadayama, H. Yoshida, N. Todoroki, S. Oda, "IRRAS and TPD investigations of carbon monoxide adsorption on MBE grown Fe on Pt(100)", e-Journal of Surface Science and Nanotechnology, 7, 2009, pp. 245-248. https://doi.org/10.1380/ejssnt.2009.245
  • 3. T. Wadayama, H. Yoshida, N. Todoroki, S. Oda, "Carbon monoxide adsorption on Ni/Pt(111) surfaces investigated by infrared reflection absorption spectroscopy", e-Journal of Surface Science and Nanotechnology, 7, 2009, pp. 230-233. https://doi.org/10.1380/ejssnt.2009.230
  • 4. T. Wadayama, H. Yoshida, S. Oda, N. Todoroki, "Infrared reflection absorption study for carbon monoxide adsorption on chromium deposited Cu(100) surfaces", Materials Transactions, 50 (4), 2009, pp. 819-824. https://doi.org/10.2320/matertrans.MRA2008442