TY - JOUR
T1 - A 2D metal-organic framework/Ni(OH) 2 heterostructure for an enhanced oxygen evolution reaction
AU - Zhu, Dongdong
AU - Liu, Jinlong
AU - Wang, Liang
AU - Du, Yi
AU - Zheng, Yao
AU - Davey, Kenneth
AU - Qiao, Shi Zhang
N1 - Publisher Copyright:
© 2019 The Royal Society of Chemistry.
PY - 2019/2/28
Y1 - 2019/2/28
N2 - 2D metal-organic frameworks (MOFs) are widely regarded as promising electrocatalysts for the oxygen evolution reaction (OER). This results from their inherent properties such as a large portion of surface coordinatively unsaturated metal atoms, rapid mass transfer and enhanced conductivity. However, 2D MOFs have a strong tendency to aggregate, which severely limits their potential application in the OER. Here, novel 2D Ni-BDC/Ni(OH) 2 (BDC stands for 1,4-benzenedicarboxylate, C 8 H 4 O 4 ) hybrid nanosheets are synthesized via a facile sonication-assisted solution method. Because of the rational material design, the large surface area of Ni-BDC is maintained. Significantly, after coupling, the electronic structure of Ni atoms in the Ni(OH) 2 component is well modified, leading to the generation of Ni cations with higher oxidation states, which are desirable for the OER. As-prepared Ni-BDC/Ni(OH) 2 exhibits high activity, favorable kinetics and strong durability towards the OER. Specifically, the OER current density of Ni-BDC/Ni(OH) 2 is 82.5 mA cm -2 at 1.6 V versus a reversible hydrogen electrode (RHE), which is significantly greater than those of Ni-BDC (5.5 times), Ni(OH) 2 (20.6 times) and Ir/C (3.0 times). Moreover, the sonication-assisted method developed in this work can be readily adapted for the preparation of various 2D MOF-based hybrid functional materials.
AB - 2D metal-organic frameworks (MOFs) are widely regarded as promising electrocatalysts for the oxygen evolution reaction (OER). This results from their inherent properties such as a large portion of surface coordinatively unsaturated metal atoms, rapid mass transfer and enhanced conductivity. However, 2D MOFs have a strong tendency to aggregate, which severely limits their potential application in the OER. Here, novel 2D Ni-BDC/Ni(OH) 2 (BDC stands for 1,4-benzenedicarboxylate, C 8 H 4 O 4 ) hybrid nanosheets are synthesized via a facile sonication-assisted solution method. Because of the rational material design, the large surface area of Ni-BDC is maintained. Significantly, after coupling, the electronic structure of Ni atoms in the Ni(OH) 2 component is well modified, leading to the generation of Ni cations with higher oxidation states, which are desirable for the OER. As-prepared Ni-BDC/Ni(OH) 2 exhibits high activity, favorable kinetics and strong durability towards the OER. Specifically, the OER current density of Ni-BDC/Ni(OH) 2 is 82.5 mA cm -2 at 1.6 V versus a reversible hydrogen electrode (RHE), which is significantly greater than those of Ni-BDC (5.5 times), Ni(OH) 2 (20.6 times) and Ir/C (3.0 times). Moreover, the sonication-assisted method developed in this work can be readily adapted for the preparation of various 2D MOF-based hybrid functional materials.
UR - https://www.scopus.com/pages/publications/85061984616
U2 - 10.1039/c8nr09680e
DO - 10.1039/c8nr09680e
M3 - 文章
C2 - 30734809
AN - SCOPUS:85061984616
SN - 2040-3364
VL - 11
SP - 3599
EP - 3605
JO - Nanoscale
JF - Nanoscale
IS - 8
ER -