NiO/Nb2O5/C hydrazine electrooxidation catalysts for anion exchange membrane fuel cells

Tomokazu Sakamoto; Teruyuki Masuda; Koji Yoshimoto; Hirofumi Kishi; Susumu Yamaguchi; Daiju Matsumura; Kazuhisa Tamura; Akihiro Hori; Yousuke Horiuchi; Alexey Serov; Kateryna Artyushkova; Plamen Atanassov; Hirohisa Tanaka

doi:10.1149/2.0281704jes

NiO/Nb₂O₅/C hydrazine electrooxidation catalysts for anion exchange membrane fuel cells

Tomokazu Sakamoto, Teruyuki Masuda, Koji Yoshimoto, Hirofumi Kishi, Susumu Yamaguchi, Daiju Matsumura, Kazuhisa Tamura, Akihiro Hori, Yousuke Horiuchi, Alexey Serov, Kateryna Artyushkova, Plamen Atanassov, Hirohisa Tanaka

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

NiO/Nb₂O₅/C (8:1), (4:1), (2:1), NiO/C, and Ni/C catalysts for hydrazine electrooxidation were synthesized by an evaporation drying method followed by thermal annealing. Prepared catalysts were characterized by X-ray diffraction (XRD), high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM), energy dispersive X-ray spectrometry (EDS), and X-ray absorption fine structure (XAFS). Catalytic activity, durability, and selectivity in the reaction of hydrazine electrooxidation were evaluated in alkaline media. The highest catalytic activity in mentioned above reaction was found for Ni/C, followed by: NiO/Nb₂O₅/C (8:1), NiO/Nb₂O₅/C (4:1). NiO/Nb₂O₅/C (2:1) whiles NiO/C has almost no activity for hydrazine oxidation. NiO/Nb₂O₅/C (8:1) and (4:1) had a highest stability during electrooxidation of hydrazine at 60°C. It was explained by oxygen defect of NiO in NiO/Nb₂O₅/C from XAFS analysis. The selectivity hydrazine electrooxidation as measured by ammonia production resulted in observation that metallic Ni surface facilitates N-N bond breaking of hydrazine, which was confirmed by density functional theory (DFT) calculations.

Original language	English
Pages (from-to)	F229-F234
Journal	Journal of the Electrochemical Society
Volume	164
Issue number	4
DOIs	https://doi.org/10.1149/2.0281704jes
State	Published - 2017
Externally published	Yes

Funding

This work was supported by CREST, JST (26289254). The XAFS analysis was performed under the Shared Use Program of JAEA Facilities with the approval of Nanotechnology Platform project supported by the Ministry of Education, Culture, Sports, Science and Technology at BL14B1 of SPring-8 (Proposal No. 2015B3616 and 2016A3616). The computation was mainly carried out using the computer facilities at Research Institute for Information Technology, Kyushu University.

Funders	Funder number
Ministry of Education, Culture, Sports, Science and Technology	2015B3616, 2016A3616
Japan Science and Technology Agency	26289254
Core Research for Evolutional Science and Technology
Research Institute for Information Technology, Kyushu University

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1149/2.0281704jes

Cite this

@article{04806b02e60e41658e0de21a799e3d1b,

title = "NiO/Nb2O5/C hydrazine electrooxidation catalysts for anion exchange membrane fuel cells",

abstract = "NiO/Nb2O5/C (8:1), (4:1), (2:1), NiO/C, and Ni/C catalysts for hydrazine electrooxidation were synthesized by an evaporation drying method followed by thermal annealing. Prepared catalysts were characterized by X-ray diffraction (XRD), high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM), energy dispersive X-ray spectrometry (EDS), and X-ray absorption fine structure (XAFS). Catalytic activity, durability, and selectivity in the reaction of hydrazine electrooxidation were evaluated in alkaline media. The highest catalytic activity in mentioned above reaction was found for Ni/C, followed by: NiO/Nb2O5/C (8:1), NiO/Nb2O5/C (4:1). NiO/Nb2O5/C (2:1) whiles NiO/C has almost no activity for hydrazine oxidation. NiO/Nb2O5/C (8:1) and (4:1) had a highest stability during electrooxidation of hydrazine at 60°C. It was explained by oxygen defect of NiO in NiO/Nb2O5/C from XAFS analysis. The selectivity hydrazine electrooxidation as measured by ammonia production resulted in observation that metallic Ni surface facilitates N-N bond breaking of hydrazine, which was confirmed by density functional theory (DFT) calculations.",

author = "Tomokazu Sakamoto and Teruyuki Masuda and Koji Yoshimoto and Hirofumi Kishi and Susumu Yamaguchi and Daiju Matsumura and Kazuhisa Tamura and Akihiro Hori and Yousuke Horiuchi and Alexey Serov and Kateryna Artyushkova and Plamen Atanassov and Hirohisa Tanaka",

year = "2017",

doi = "10.1149/2.0281704jes",

language = "English",

volume = "164",

pages = "F229--F234",

journal = "Journal of the Electrochemical Society",

issn = "0013-4651",

publisher = "The Electrochemical Society",

number = "4",

}

TY - JOUR

T1 - NiO/Nb2O5/C hydrazine electrooxidation catalysts for anion exchange membrane fuel cells

AU - Sakamoto, Tomokazu

AU - Masuda, Teruyuki

AU - Yoshimoto, Koji

AU - Kishi, Hirofumi

AU - Yamaguchi, Susumu

AU - Matsumura, Daiju

AU - Tamura, Kazuhisa

AU - Hori, Akihiro

AU - Horiuchi, Yousuke

AU - Serov, Alexey

AU - Artyushkova, Kateryna

AU - Atanassov, Plamen

AU - Tanaka, Hirohisa

PY - 2017

Y1 - 2017

N2 - NiO/Nb2O5/C (8:1), (4:1), (2:1), NiO/C, and Ni/C catalysts for hydrazine electrooxidation were synthesized by an evaporation drying method followed by thermal annealing. Prepared catalysts were characterized by X-ray diffraction (XRD), high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM), energy dispersive X-ray spectrometry (EDS), and X-ray absorption fine structure (XAFS). Catalytic activity, durability, and selectivity in the reaction of hydrazine electrooxidation were evaluated in alkaline media. The highest catalytic activity in mentioned above reaction was found for Ni/C, followed by: NiO/Nb2O5/C (8:1), NiO/Nb2O5/C (4:1). NiO/Nb2O5/C (2:1) whiles NiO/C has almost no activity for hydrazine oxidation. NiO/Nb2O5/C (8:1) and (4:1) had a highest stability during electrooxidation of hydrazine at 60°C. It was explained by oxygen defect of NiO in NiO/Nb2O5/C from XAFS analysis. The selectivity hydrazine electrooxidation as measured by ammonia production resulted in observation that metallic Ni surface facilitates N-N bond breaking of hydrazine, which was confirmed by density functional theory (DFT) calculations.

AB - NiO/Nb2O5/C (8:1), (4:1), (2:1), NiO/C, and Ni/C catalysts for hydrazine electrooxidation were synthesized by an evaporation drying method followed by thermal annealing. Prepared catalysts were characterized by X-ray diffraction (XRD), high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM), energy dispersive X-ray spectrometry (EDS), and X-ray absorption fine structure (XAFS). Catalytic activity, durability, and selectivity in the reaction of hydrazine electrooxidation were evaluated in alkaline media. The highest catalytic activity in mentioned above reaction was found for Ni/C, followed by: NiO/Nb2O5/C (8:1), NiO/Nb2O5/C (4:1). NiO/Nb2O5/C (2:1) whiles NiO/C has almost no activity for hydrazine oxidation. NiO/Nb2O5/C (8:1) and (4:1) had a highest stability during electrooxidation of hydrazine at 60°C. It was explained by oxygen defect of NiO in NiO/Nb2O5/C from XAFS analysis. The selectivity hydrazine electrooxidation as measured by ammonia production resulted in observation that metallic Ni surface facilitates N-N bond breaking of hydrazine, which was confirmed by density functional theory (DFT) calculations.

UR - http://www.scopus.com/inward/record.url?scp=85020237735&partnerID=8YFLogxK

U2 - 10.1149/2.0281704jes

DO - 10.1149/2.0281704jes

M3 - Article

AN - SCOPUS:85020237735

SN - 0013-4651

VL - 164

SP - F229-F234

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

IS - 4

ER -