2020

    論文： Research papers

  • ・ N. Todoroki, S. Takahashi, K. Kawaguchi, Y. Fugane, T. Wadayama, "Dry synthesis of single-nanometer-scale PtSi fine particles for electrocatalysis", Journal of Electroanalytical Chemistry, In Press.DOI:10.1016/j.jelechem.2020.114492
  • ・ N. Todoroki, H. Tsurumaki, H. Tei, T. Mochizuki, T. Wadayama, "Online electrochemical mass spectrometry combined with the rotating disk electrode method for direct observations of potential-dependent molecular behaviors in the electrode surface vicinity", Journal of the Electrochemical Society, 167 (2020) 106503.DOI:10.1149/1945-7111/ab9960
  • ・ F. E. Feiten, S. Takahashi, O. Sekizawa, Y. Wakisaka, T. Sakata, N. Todoroki, T. Uruga, T. Wadayama, Y. Iwasawa, K. Asakura, "Model Building Analysis - a novel method for statistical evaluation of Pt L3-edge EXAFS data to unravel the structure of Pt-alloy nanoparticles for the oxygen reduction reaction on highly oriented pyrolytic graphite", Physical Chemistry Chemical Physics, (2020) Advance article DOI:10.1039/C9CP06891K (2020 PCCP Hot Article)


2019

    論文： Research papers

  • ・ N. Todoroki, T. Wadayama, "Hetero-Layered Ni-Fe Hydroxide/Oxide Nanostructures Generated on Stainless-Steel Substrate for Efficient Alkaline Water Splitting", ACS Applied Materials and Interfaces, 11 (2019) 44161-44169. DOI:10.1021/acsami.9b14213
  • ・ 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,　和田山智正, "よく規定された合金系電極触媒表面モデルのドライプロセス合成と特性評価", 電気化学, 87 (2019) 250-257. DOI:10.5796/denkikagaku.19-TE0006
  • ・ 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

    論文： Research papers

  • 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.

    • 特許

  • 3. 特願2018-196341, "ナノ粒子およびナノ粒子の製造方法”，高橋俊太郎、轟直人、和田山智正


2017

    論文： Research papers

  • 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

    • 特許

  • 3. 特願2017-203904, "ナノ粒子およびナノ粒子の製造方法”，高橋俊太郎、轟直人、和田山智正


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