TY - JOUR
T1 - Metallic Nickel Hydroxide Nanosheets Give Superior Electrocatalytic Oxidation of Urea for Fuel Cells
AU - Zhu, Xiaojiao
AU - Dou, Xinyu
AU - Dai, Jun
AU - An, Xingda
AU - Guo, Yuqiao
AU - Zhang, Lidong
AU - Tao, Shi
AU - Zhao, Jiyin
AU - Chu, Wangsheng
AU - Zeng, Xiao Cheng
AU - Wu, Changzheng
AU - Xie, Yi
N1 - Funding Information:
This work was financially supported by the National Basic Research Program of China (2015CB932302), the National Natural Science Foundation of China (U1432133, 21501164, U1532265, 11321503, J1030412), the Chinese Academy of Sciences (XDB01020300), the Fok Ying-Tong Education Foundation, China (141042), and the Fundamental Research Funds for the Central Universities (WK2060190027, WK2340000065), National Program for Support of Top-notch Young Professionals, National Key Scientific Instruments and Equipment Development Program of China (2012YQ22011305).
Publisher Copyright:
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2016/9/26
Y1 - 2016/9/26
N2 - The direct urea fuel cell (DUFC) is an important but challenging renewable energy production technology, it offers great promise for energy-sustainable developments and mitigating water contamination. However, DUFCs still suffer from the sluggish kinetics of the urea oxidation reaction (UOR) owing to a 6 e−transfer process, which poses a severe hindrance to their practical use. Herein, taking β-Ni(OH)2nanosheets as the proof-of-concept study, we demonstrated a surface-chemistry strategy to achieve metallic Ni(OH)2nanosheets by engineering their electronic structure, representing a first metallic configuration of transition-metal hydroxides. Surface sulfur incorporation successfully brings synergetic effects of more exposed active sites, good wetting behavior, and effective electron transport, giving rise to greatly enhanced performance for UOR. Metallic nanosheets exhibited a much higher current density, smaller onset potential and stronger durability.
AB - The direct urea fuel cell (DUFC) is an important but challenging renewable energy production technology, it offers great promise for energy-sustainable developments and mitigating water contamination. However, DUFCs still suffer from the sluggish kinetics of the urea oxidation reaction (UOR) owing to a 6 e−transfer process, which poses a severe hindrance to their practical use. Herein, taking β-Ni(OH)2nanosheets as the proof-of-concept study, we demonstrated a surface-chemistry strategy to achieve metallic Ni(OH)2nanosheets by engineering their electronic structure, representing a first metallic configuration of transition-metal hydroxides. Surface sulfur incorporation successfully brings synergetic effects of more exposed active sites, good wetting behavior, and effective electron transport, giving rise to greatly enhanced performance for UOR. Metallic nanosheets exhibited a much higher current density, smaller onset potential and stronger durability.
KW - fuel cells
KW - metallic transition-metal hydroxide
KW - nanosheets
KW - sulfur
KW - urea oxidation reaction
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U2 - 10.1002/anie.201606313
DO - 10.1002/anie.201606313
M3 - Article
C2 - 27572334
AN - SCOPUS:84983746111
VL - 55
SP - 12465
EP - 12469
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 40
ER -