Development of ion conducting membrane and electrocatalyst based on hydroxide nanosheets for efficient enery conversion

• Project/Area Number: 18H03869
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Medium-sized Section 28:Nano/micro science and related fields
• Research Institution: National Institute for Materials Science
• Principal Investigator: 馬 仁志 国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, グループリーダー (90391218)
• Co-Investigator(Kenkyū-buntansha): 坂井 伸行 国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 主任研究員 (70431822)
• Project Period (FY): 2018-04-01 – 2022-03-31
• Project Status: Granted (Fiscal Year 2021)
• Budget Amount: ¥44,200,000 (Direct Cost: ¥34,000,000、Indirect Cost: ¥10,200,000); Fiscal Year 2021: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000); Fiscal Year 2020: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000); Fiscal Year 2019: ¥13,000,000 (Direct Cost: ¥10,000,000、Indirect Cost: ¥3,000,000); Fiscal Year 2018: ¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000)
• Keywords: 水酸化物 / ナノシート / イオン伝導 / 電極触媒 / 水電解 / 燃料電池

Outline of Annual Research Achievements

本年度において、層状複水酸化物（LDH）ナノシート分散液を用い、マイクロスケールの薄膜を製膜し、膜面垂直方向のイオン伝導度を大幅に向上する試みを行なった。ナノシート分散液と共沈法で合成したLDHナノプレートレット（ナノ粒子）を混合させ、濾過プロセスにより複合膜を調製した。複合膜にナノ粒子を組み込むことによって、ナノシートが再積層する際の平行配向度を低減することができ、イオン伝導経路とネットワークを効果的に形成する。その結果、LDHナノシートのみ積層する場合に比べ、複合膜における二次元的な伝導異方性が顕著に改善された。LDHナノシートとナノ粒子の含有率を調整し、複合膜において面内方向のオン伝導度を10-1 S/cm程度に維持しながら、垂直方向の伝導度が10-2 S/cmまで向上することを確認した。
また、遷移金属の配位環境と価数の制御により、4配位と6配位、2価と3価が混在しているCo2+-Fe3+水酸化物ナノコーンを創製した。Co2+-Fe3+水酸化物ナノコーンは電極触媒として酸素発生反応（OER）においての過電圧が小さく、特に優れたTOF（ターンオーバー頻度）を有することを明らかにした。
これまで合成してきたNi-FeやCo-Fe LDHにおいて、Fe含有量は触媒能に大きな影響を及ぼすことを示唆している。これに基づき、高品質の単一鉄組成Fe2+-Fe3+ LDHの合成を新たに着手した。均一沈澱法を用いることにより、空気を厳密に排除した環境の中でブルーサイト様水酸化第一鉄（Fe(OH2)）の高結晶性六角形プレートレットを合成した。Fe(OH2)サンプルにヨウ素（I2）処理を施し、Fe2+を部分的酸化すると同時に、ヨウ素イオン（I-）がインターカレートされるFe2+-Fe3+ LDH結晶にトポケミカル的に変換することに成功した。

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

LDHナノシートとナノ粒子の複合膜を調製することによって、薄膜面内方向の高いオン伝導度を維持しながら、膜面垂直方向の伝導度を10-2 S/cmまで向上することができた。目標の10-1 S/cmという高伝導率を持つイオン伝導膜の創製に向けて、大きな進展が得られたと言える。
層状複水酸化物の金属組成をチューニングするとともに、配位環境と原子価の制御を行なうことによって、4/6配位と2/3価が混在しているCo2+-Fe3+水酸化物ナノコーンの創製に初めて成功した。酸素発生反応電極触媒としての活性が高く、優れたTOFを有することから、ナノ構造の高度制御により触媒能の向上につながる手かがりを得た。今後、単一鉄組成Fe2+-Fe3+ LDHの合成および特性評価を進めることによって、Fe活性サイトの触媒反応過程およびメカニズムの解明が期待される。
上述の成果から、ナノシートを用いたイオン伝導膜の開発及び高度なナノ構造デザインによる遷移金属触媒の創製に向けて順調に進展していると考える。

Strategy for Future Research Activity

引き続き、LDHナノシート分散液を用いたマイクロスケールの薄膜やフィルムの調製を行なう。LDHナノシートとナノ粒子の複合膜の成膜条件を最適化する一方、ナノシートをビニルアルコールなどのモノマーとの重合により、高分子骨格を有する無機ナノシート・有機樹脂の複合膜を作製する。厚さ数μm～数十μmの大面積（cmサイズ）イオン伝導膜の加工手法や作製プロセスの確立に向けて、機械的性質・力学的特性を評価しながら、主要な伝導経路である膜面垂直方向において高いイオン伝導度の達成を目指す。
同時に、新型層状複水酸化物Fe2+-Fe3+ LDHの合成および単層剥離によるナノシート化に関する研究を重点的に進める。Fe2+-Fe3+ LDHナノシートの触媒活性を系統的に評価するとともに、Fe活性サイトの反応過程およびメカニズムの解明に努める。さらに、ナノシートと2次元物質同士（グラフェン、MoS2、MXeneなど）と分子レベルの複合化により超格子材料を構築する。超格子内部のヘテロ接合界面における電荷移動および電子構造の調節に着目して、安価な電極触媒として貴金属代替可能な高性能の実現を目指す。
作製したイオン伝導膜および電極触媒をアセンブルし、膜ー電極集合体として発電や水電解試験を行なう。本研究課題の最終目標であるアルカリ環境の中で作動する燃料電池や水電解セルなどのエネルギー変換技術の創出に繋げていく。

Research Products

• [Journal Article] Synthesis of Co(II)-Fe(III) Hydroxide Nanocones with Mixed Octahedral/Tetrahedral Coordination toward Efficient Electrocatalysis (2020)
  • Author(s): He Yuanqing、Liu Xiaohe、Chen Gen、Pan Jiangling、Yan Ailing、Li An、Lu Xueyi、Tang Daiming、Zhang Ning、Qiu Tingsheng、Ma Renzhi、Sasaki Takayoshi
  • Journal Title: Chemistry of Materials Volume: 32 Pages: 4232-4240
  • DOI: 10.1021/acs.chemmater.0c00512
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] CoNiFe Layered Double Hydroxide/RuO2.1 Nanosheet Superlattice as Carbon-Free Electrocatalysts for Water Splitting and Li-O2 Batteries (2020)
  • Author(s): Lu Xueyi、Sakai Nobuyuki、Tang Daiming、Li Xinming、Taniguchi Takaaki、Ma Renzhi、Sasaki Takayoshi
  • Journal Title: ACS Applied Materials & Interfaces Volume: 12 Pages: 33083-33093
  • DOI: 10.1021/acsami.0c07656
  • Peer Reviewed
• [Journal Article] Strain engineering of two-dimensional multilayered heterostructures for beyond-lithium-based rechargeable batteries (2020)
  • Author(s): Xiong Pan、Zhang Fan、Zhang Xiuyun、Wang Shijian、Liu Hao、Sun Bing、Zhang Jinqiang、Sun Yi、Ma Renzhi、Bando Yoshio、Zhou Cuifeng、Liu Zongwen、Sasaki Takayoshi、Wang Guoxiu
  • Journal Title: Nature Communications Volume: 11 Pages: 3297-3297
  • DOI: 10.1038/s41467-020-17014-w
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Metal-Organic Framework Hexagonal Nanoplates: Bottom-up Synthesis, Topotactic Transformation, and Efficient Oxygen Evolution Reaction (2020)
  • Author(s): Lin Yifan、Wan Hao、Wu Dan、Chen Gen、Zhang Ning、Liu Xiaohe、Li Junhui、Cao Yijun、Qiu Guanzhou、Ma Renzhi
  • Journal Title: Journal of the American Chemical Society Volume: 142 Pages: 7317-7321
  • DOI: 10.1021/jacs.0c01916
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Ultrathin Nanosheet-Assembled Co-Fe Hydroxide Nanotubes: Sacrificial Template Synthesis, Topotactic Transformation, and Their Application as Electrocatalysts for Efficient Oxygen Evolution Reaction (2020)
  • Author(s): Wang Hao、Wang Haoji、Wan Hao、Wu Dan、Chen Gen、Zhang Ning、Cao Yijun、Liu Xiaohe、Ma Renzhi
  • Journal Title: ACS Applied Materials & Interfaces Volume: 12 Pages: 46578-46587
  • DOI: 10.1021/acsami.0c15253
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] 2D Layered Double Hydroxide Nanosheets and Their Derivatives Toward Efficient Oxygen Evolution Reaction (2020)
  • Author(s): Lu Xueyi、Xue Hairong、Gong Hao、Bai Mingjun、Tang Daiming、Ma Renzhi、Sasaki Takayoshi
  • Journal Title: Nano-Micro Letters Volume: 12 Pages: 86-86
  • DOI: 10.1007/s40820-020-00421-5
  • Peer Reviewed / Open Access
• [Journal Article] 2D Superlattices for Efficient Energy Storage and Conversion (2020)
  • Author(s): Xiong Pan、Sun Bing、Sakai Nobuyuki、Ma Renzhi、Sasaki Takayoshi、Wang Shijian、Zhang Jinqiang、Wang Guoxiu
  • Journal Title: Advanced Materials Volume: 31 Pages: 1902654-1902654
  • DOI: 10.1002/adma.201902654
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Two-Dimensional Molecular Sheets of Transition Metal Oxides toward Wearable Energy Storage (2020)
  • Author(s): Jiang Kun、Xiong Pan、Ji Jinpeng、Zhu Junwu、Ma Renzhi、Sasaki Takayoshi、Geng Fengxia
  • Journal Title: Accounts of Chemical Research Volume: 53 Pages: 2443-2455
  • DOI: 10.1021/acs.accounts.0c00483
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Layered Metal Hydroxides and Their Derivatives: Controllable Synthesis, Chemical Exfoliation, and Electrocatalytic Applications (2020)
  • Author(s): Chen Gen、Wan Hao、Ma Wei、Zhang Ning、Cao Yijun、Liu Xiaohe、Wang Jun、Ma Renzhi
  • Journal Title: Advanced Energy Materials Volume: 10 Pages: 1902535-1902535
  • DOI: 10.1002/aenm.201902535
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Two-dimensional organic-inorganic superlattice-like heterostructures for energy storage applications (2020)
  • Author(s): Xiong Pan、Wu Yunyan、Liu Yifan、Ma Renzhi、Sasaki Takayoshi、Wang Xin、Zhu Junwu
  • Journal Title: Energy & Environmental Science Volume: 13 Pages: 4834-4853
  • DOI: 10.1039/d0ee03206a
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Advanced electrocatalysts based on two-dimensional transition metal hydroxides and their composites for alkaline oxygen reduction reaction (2020)
  • Author(s): Wan Hao、Chen Fashen、Ma Wei、Liu Xiaohe、Ma Renzhi
  • Journal Title: Nanoscale Volume: 12 Pages: 21479-21496
  • DOI: 10.1039/d0nr05072e
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Alternate Restacking of 2D CoNi Hydroxide and Graphene Oxide Nanosheets for Energetic Oxygen Evolution (2019)
  • Author(s): Jia Lulu、Wan Hao、Liu Xiaohe、Chen Gen、Zhang Ning、Li Junhui、Zhou Wei、Cao Yijun、Ma Renzhi、Qiu Guanzhou
  • Journal Title: ChemSusChem Volume: 12 Pages: 5274-5281
  • DOI: 10.1002/cssc.201902641
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Hybrid Nanostructures of Bimetallic NiCo Nitride/N-Doped Reduced Graphene Oxide as Efficient Bifunctional Electrocatalysts for Rechargeable Zn-Air Batteries (2019)
  • Author(s): He Yuanqing、Liu Xiaohe、Yan Ailing、Wan Hao、Chen Gen、Pan Jiangling、Zhang Ning、Qiu Tingsheng、Ma Renzhi、Qiu Guanzhou
  • Journal Title: ACS Sustainable Chemistry & Engineering Volume: 7 Pages: 19612-19620
  • DOI: 10.1021/acssuschemeng.9b04703
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Superionic conduction along ordered hydroxyl networks in molecular-thin nanosheets (2019)
  • Author(s): Sun Pengzhan、Chen Fashen、Zhou Wei、Liu Xiaohe、Ma Renzhi、Sasaki Takayoshi
  • Journal Title: Materials Horizons Volume: 6 Pages: 2087-2093
  • DOI: 10.1039/c9mh00549h
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Constructing Conductive Interfaces between Nickel Oxide Nanocrystals and Polymer Carbon Nitride for Efficient Electrocatalytic Oxygen Evolution Reaction (2019)
  • Author(s): Liao Chengan、Yang Baopeng、Zhang Ning、Liu Min、Chen Guoxin、Jiang Xiaoming、Chen Gen、Yang Junliang、Liu Xiaohe、Chan Ting‐Shan、Lu Ying‐Jui、Ma Renzhi、Zhou Wei
  • Journal Title: Advanced Functional Materials Volume: 29 Pages: 1904020-1904020
  • DOI: 10.1002/adfm.201904020
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Interface Modulation of Two-Dimensional Superlattices for Efficient Overall Water Splitting (2019)
  • Author(s): Xiong Pan、Zhang Xiuyun、Wan Hao、Wang Shijian、Zhao Yufei、Zhang Jinqiang、Zhou Dong、Gao Weicheng、Ma Renzhi、Sasaki Takayoshi、Wang Guoxiu
  • Journal Title: Nano Letters Volume: 19 Pages: 4518-4526
  • DOI: 10.1021/acs.nanolett.9b01329
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Activity enhancement of layered cobalt hydroxide nanocones by tuning interlayer spacing and phosphidation for electrocatalytic water oxidation in neutral solutions (2019)
  • Author(s): Qin Ruinan、Wan Hao、Liu Xiaohe、Chen Gen、Zhang Ning、Ma Renzhi、Qiu Guanzhou
  • Journal Title: Inorganic Chemistry Frontiers Volume: 6 Pages: 1744-1752
  • DOI: 10.1039/c9qi00453j
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Recent advances in developing high-performance nanostructured electrocatalysts based on 3d transition metal elements (2019)
  • Author(s): Wan Hao、Liu Xiaohe、Wang Haidong、Ma Renzhi、Sasaki Takayoshi
  • Journal Title: Nanoscale Horizons Volume: 4 Pages: 789-808
  • DOI: 10.1039/c8nh00461g
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Large-area graphene-nanomesh/carbon-nanotube hybrid membranes for ionic and molecular nanofiltration (2019)
  • Author(s): Yang Yanbing、Yang Xiangdong、Liang Ling、Gao Yuyan、Cheng Huanyu、Li Xinming、Zou Mingchu、Ma Renzhi、Yuan Quan、Duan Xiangfeng
  • Journal Title: Science Volume: 364 Pages: 1057-1062
  • DOI: 10.1126/science.aau5321
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Post-synthesis isomorphous substitution of layered Co-Mn hydroxide nanocones with graphene oxide as high-performance supercapacitor electrodes (2019)
  • Author(s): Zhang Dan、Wang Hao、Chen Gen、Wan Hao、Zhang Ning、Liu Xiaohe、Ma Renzhi
  • Journal Title: Nanoscale Volume: 11 Pages: 6165-6173
  • DOI: 10.1039/c8nr10473e
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Cobalt iron phosphide nanoparticles embedded within a carbon matrix as highly efficient electrocatalysts for the oxygen evolution reaction (2019)
  • Author(s): Han Jiang、Chen Gen、Liu Xiaohe、Zhang Ning、Liang Shuquan、Ma Renzhi、Qiu Guanzhou
  • Journal Title: Chemical Communications Volume: 55 Pages: 9212-9215
  • DOI: 10.1039/c9cc03117k
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Heterostructured NiFe oxide/phosphide nanoflakes for efficient water oxidation (2019)
  • Author(s): Yan Ailing、Wan Hao、Chen Gen、Zhang Ning、Ma Wei、Liu Xiaohe、Cao Yijun、Ma Renzhi
  • Journal Title: Dalton Transactions Volume: 48 Pages: 8442-8448
  • DOI: 10.1039/c9dt01275c
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] 2D free‐standing nitrogen‐doped Ni‐Ni3S2@carbon nanoplates derived from metal-organic frameworks for enhanced oxygen evolution reaction (2019)
  • Author(s): Lin Yifan、Chen Gen、Wan Hao、Chen Fashen、Liu Xiaohe、Ma Renzhi
  • Journal Title: Small Volume: 15 Pages: 1900348-1900348
  • DOI: 10.1002/smll.201900348
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Progress and perspective on two-dimensional unilamellar metal oxide nanosheets and tailored nanostructures from them for electrochemical energy storage (2019)
  • Author(s): Xiong Pan、Ma Renzhi、Wang Guoxiu、Sasaki Takayoshi
  • Journal Title: Energy Storage Materials Volume: 19 Pages: 281-298
  • DOI: 10.1016/j.ensm.2018.12.011
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Recent progress in functionalized layered double hydroxides and their application in efficient electrocatalytic water oxidation (2019)
  • Author(s): Deng Xiaolong、Huang Jinzhao、Wan Hao、Chen Fashen、Lin Yifan、Xu Xijin、Ma Renzhi、Sasaki Takayoshi
  • Journal Title: Journal of Energy Chemistry Volume: 32 Pages: 93-104
  • DOI: 10.1016/j.jechem.2018.07.007
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] In situ growth of metallic Ag0 intercalated CoAl layered double hydroxides as efficient electrocatalysts for the oxygen reduction reaction in alkaline solutions (2019)
  • Author(s): Deng Xiaolong、Huang Jinzhao、Chen Fashen、Wan Hao、Lin Yifan、Xu Xijin、Ma Renzhi、Sasaki Takayoshi
  • Journal Title: Dalton Transactions Volume: 48 Pages: 1084-1094
  • DOI: 10.1039/c8dt04610g
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Unilamellar Metallic MoS2/Graphene Superlattice for Efficient Sodium Storage and Hydrogen Evolution (2018)
  • Author(s): Xiong Pan、Ma Renzhi、Sakai Nobuyuki、Nurdiwijayanto Leanddas、Sasaki Takayoshi
  • Journal Title: ACS Energy Letters Volume: 3 Pages: 997-1005
  • DOI: 10.1021/acsenergylett.8b00110
  • Peer Reviewed
• [Journal Article] Liquid phase exfoliation of MoS2 assisted by formamide solvothermal treatment and enhanced electrocatalytic activity based on (H3Mo12O40P/MoS2)n multilayer structure (2018)
  • Author(s): Jinzhao Huang, Xiaolong Deng, Hao Wan, Fashen Chen, Yifan Lin, Xijin Xu, Renzhi Ma, Takayoshi Sasaki
  • Journal Title: ACS Sustainable Chemistry & Engineering Volume: 6 Pages: 5227-5237
  • DOI: 10.1021/acssuschemeng.7b04873
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Two-dimensional porous cuprous oxide nanoplatelets derived from metal-organic frameworks (MOFs) for efficient photocatalytic dye degradation under visible light (2018)
  • Author(s): Lin Yifan、Wan Hao、Chen Fashen、Liu Xiaohe、Ma Renzhi、Sasaki Takayoshi
  • Journal Title: Dalton Transactions Volume: 47 Pages: 7694-7700
  • DOI: 10.1039/c8dt01117f
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Rare Cobalt-Based Phosphate Nanoribbons with Unique 5-Coordination for Electrocatalytic Water Oxidation (2018)
  • Author(s): Wan Hao、Ma Renzhi、Liu Xiaohe、Pan Jiangling、Wang Haidong、Liang Shuquan、Qiu Guanzhou、Sasaki Takayoshi
  • Journal Title: ACS Energy Letters Volume: 3 Pages: 1254-1260
  • DOI: 10.1021/acsenergylett.8b00621
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Cobalt-doped Ni-Mn layered double hydroxide nanoplates as high-performance electrocatalyst for oxygen evolution reaction (2018)
  • Author(s): Wang Yi、Liu Xiaohe、Zhang Ning、Qiu Guanzhou、Ma Renzhi
  • Journal Title: Applied Clay Science Volume: 165 Pages: 277-283
  • DOI: 10.1016/j.clay.2018.07.036
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Synthesis and Substitution Chemistry of Redox-Active Manganese/Cobalt Oxide Nanosheets (2018)
  • Author(s): Sakai Nobuyuki、Fukuda Katsutoshi、Ma Renzhi、Sasaki Takayoshi
  • Journal Title: Chemistry of Materials Volume: 30 Pages: 1517-1523
  • DOI: 10.1021/acs.chemmater.7b04068
  • Peer Reviewed
• [Presentation] Integration of layered double hydroxide nanosheets and nanoparticles for high performance anion exchange membrane (2021)
  • Author(s): Fang Xian, Renzhi Ma, Yoshiyuki Sugahara, Takayoshi Sasaki
  • Organizer: 日本化学会第101春季年会(2021)
• [Presentation] Topochemical synthesis and anion exchange of iron (II, III) layered hydrxoides toward oxygen evolution reaction (OER) (2021)
  • Author(s): Lulu Jia, Renzhi Ma, Yoshiyuki Sugahara, Takayoshi Sasaki
  • Organizer: 日本化学会第101春季年会(2021)
• [Presentation] A High-Performance Solid Inorganic Anion Exchange Membrane via Integration of Layered Double Hydroxide Nanosheets and Nanoparticles (2021)
  • Author(s): Fang Xian, Renzhi Ma, Yoshiyuki Sugahara, Takayoshi Sasaki
  • Organizer: MANA International Symposium 2021 jointly with ICYS
  • Int'l Joint Research
• [Presentation] Synthesis of Highly Crystalline Fe2+-Fe3+ Layered Hydroxides via Topochemical Method Toward Oxygen Evolution Reaction (OER) (2021)
  • Author(s): Lulu Jia, Renzhi Ma, Yoshiyuki Sugahara, Takayoshi Sasaki
  • Organizer: MANA International Symposium 2021 jointly with ICYS
  • Int'l Joint Research
• [Presentation] 2D Functional Nanosheets: Soft Chemical Synthesis, Hetero-assembly and Emergent Properties (2019)
  • Author(s): Ma Renzhi, Sasaki Takayoshi
  • Organizer: The 13th Pacific Rim Conference of Ceramic Societies (PACRIM13)
  • Int'l Joint Research / Invited
• [Presentation] Ion Conducting and Electrocatalytic Properties of LDH Nanosheets (2019)
  • Author(s): Sun Pengzhan, Chen Fashen, Ma Wei, Zhou Wei, Ma Renzhi, Sasaki Takayoshi
  • Organizer: The 13th Pacific Rim Conference of Ceramic Societies (PACRIM13)
  • Int'l Joint Research / Invited
• [Presentation] Exploration of 2D Nanosheets and Hetero-structured Composites with Emergent properties. (2019)
  • Author(s): Ma Renzhi, Sasaki Takayoshi
  • Organizer: The 4th International Symposium on Creation of Life Innovation Materials for Interdisciplinary and International Research Development
  • Int'l Joint Research / Invited
• [Presentation] Exploration of Single-layer Nanosheets and Hybrids for Emergent Functions (2019)
  • Author(s): Ma Renzhi, Sasaki Takayoshi
  • Organizer: The 8th Asian Conference on Colloid and Interface Science (ACCIS 2019)
• [Presentation] Exploration of 2D nanosheets for energy-related applications (2019)
  • Author(s): Ma Renzhi, Sasaki Takayoshi
  • Organizer: 5th International Symposium of Advanced Inorganic Materials
• [Presentation] Anion Conductors and Electrocatalysts based on 2D Nanosheets (2019)
  • Author(s): Ma Renzhi, Sasaki Takayoshi
  • Organizer: 2019 International Conference on Electrochemical Energy
• [Presentation] Exploration of 2D hydroxide nanosheets and their hetero-assemblies with emergent properties (2019)
  • Author(s): Ma Renzhi, Sasaki Takayoshi
  • Organizer: The 2nd International Symposium on Chemistry of Nanomaterials
• [Presentation] Exploration of Single-layer Nanosheets and Their Assemblies with Emergent Properties (2019)
  • Author(s): Ma Renzhi, Sasaki Takayoshi
  • Organizer: １＆２DM Conference & Exhibition
• [Presentation] Superlattice of CoNiFe LDH/Ruthenium Oxide Nanosheets as Efficient Electrocatalysts for Oxygen Evolution Reaction (2019)
  • Author(s): Lu Xueyi, Sakai Nobuyuki, Tang Daiming, Li Xinming, Taniguchi Takaaki, Ma Renzhi, Sasaki Takayoshi
  • Organizer: The 2nd International Symposium on Chemistry of Nanomaterials
  • Int'l Joint Research
• [Presentation] Superior Anionic Transport in 2D Hydroxide Nanosheets (2019)
  • Author(s): Sun Pengzhan, Chen Fashen, Zhou Wei, Ma Renzhi, Sasaki Takayoshi
  • Organizer: 日本化学会第99春季年会
• [Presentation] Superlattice Structured CoNiFe Layered Double Hydroxides/Ruthenium Oxide Nanosheets as Efficient Electrocatalysts for Oxygen Evolution Reaction (2019)
  • Author(s): Lu Xueyi, Sakai Nobuyuki, Tang Daiming, Li Xinming, Taniguchi Takaaki, Ma Renzhi, Sasaki Takayoshi
  • Organizer: 日本化学会第99春季年会
• [Presentation] Exploration of Single-layer Nanosheets and Their Assemblies with Emergent Properties (2019)
  • Author(s): Ma Renzhi, Sun Pengzhan, Ma Wei, Sasaki Takayoshi
  • Organizer: １＆２DM Conference & Exhibition
  • Int'l Joint Research / Invited
• [Presentation] Single-layer Nanosheets and their Assembly for Emergent Functions (2018)
  • Author(s): Ma Renzhi
  • Organizer: Asian Conference on Nanoscience and Nanotechnology 2018
  • Int'l Joint Research / Invited
• [Presentation] Solution-Based Lattice Engineering with 2D Oxide and Hydroxide Nanosheets (2018)
  • Author(s): Sasaki Takayoshi, Ebina Yasuo, Sakai Nobuo, Ma Renzhi, Osada Minoru
  • Organizer: 19th International Symposium on the Reactivity of Solids
  • Int'l Joint Research / Invited
• [Patent(Industrial Property Rights)] ナノ構造体、酸素発生反応用の触媒、及び、ナノ構造体の製造方法 (2020)
  • Inventor(s): 馬 仁志/フェ ユアンチン/佐々木 高義
  • Industrial Property Rights Holder: 物質・材料研究機構
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2020-127104
  • Filing Date: 2020