Bio-Inspired Leaf-Mimicking Nanosheet/Nanotube Heterostructure as a Highly Efficient Oxygen Evolution Catalyst.
Plant leaves represent a unique 2D/1D heterostructure for enhanced surface reaction and efficient mass transport. Inspired by plant leaves, a 2D/1D CoOxheterostructure is developed that is composed of ultrathin CoOxnanosheets further assembled into a nanotube structure. This bio-inspired architecture allows a highly active Co2+electronic structure for an efficient oxygen evolution reaction (OER) at the atomic scale, ultrahigh surface area (371 m2g-1) for interfacial electrochemical reaction at the nanoscale, and enhanced transport of charge and electrolyte over CoOxnanotube building blocks at the microscale. Consequently, this CoOxnanosheet/nanotube heterostructure demonstrates a record-high OER performance based on cobalt compounds reported so far, with an onset potential of ≈1.46 V versus reversible hydrogen electrode (RHE), a current density of 51.2 mA cm-2at 1.65 V versus RHE, and a Tafel slope of 75 mV dec-1. Using the CoOxnanosheet/nanotube catalyst and a Pt-mesh, a full water splitting cell with a 1.5-V battery is also demonstrated.
Department of Chemistry Laboratory of Advanced Materials Collaborative Innovation Center for Energy Materials Fudan University Shanghai P.R. China.
Yongcheng
Y
Wang
Department of Chemistry Laboratory of Advanced Materials Collaborative Innovation Center for Energy Materials Fudan University Shanghai P.R. China.
Kun
K
Jiang
Soochow University-Western University Centre for Synchrotron Radiation Research Institute of Functional Nano and Soft Materials Laboratory (FUNSOM) Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou P.R. China.
Hui
H
Zhang
State Key Laboratory of Surface Physics Key Laboratory for Computational Physical Sciences (MOE) and Department of Physics Fudan University Shanghai P.R. China.
Tong
T
Zhou
Soochow University-Western University Centre for Synchrotron Radiation Research Institute of Functional Nano and Soft Materials Laboratory (FUNSOM) Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou P.R. China.
Jiwei
J
Wang
Department of Chemistry Laboratory of Advanced Materials Collaborative Innovation Center for Energy Materials Fudan University Shanghai P.R. China.
Wei
W
Wei
State Key Laboratory of Surface Physics Key Laboratory for Computational Physical Sciences (MOE) and Department of Physics Fudan University Shanghai P.R. China.
Zhongqin
Z
Yang
Soochow University-Western University Centre for Synchrotron Radiation Research Institute of Functional Nano and Soft Materials Laboratory (FUNSOM) Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou P.R. China.
Xuhui
X
Sun
Department of Chemistry Laboratory of Advanced Materials Collaborative Innovation Center for Energy Materials Fudan University Shanghai P.R. China.
Wen-Bin
WB
Cai
Department of Chemistry Laboratory of Advanced Materials Collaborative Innovation Center for Energy Materials Fudan University Shanghai P.R. China.
Gengfeng
G
Zheng
CoOx; electrocatalyst; nanosheet; nanotube; oxygen evolution reaction
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