Journal
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume 32, Issue 18, Pages 22974-22983Publisher
SPRINGER
DOI: 10.1007/s10854-021-06782-w
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Funding
- National Natural Science Foundation of China [51701001, 61804039, 51802145]
- Academic funding projects for Top Talents in Subjects (Majors) of Universities [gxbjZD31]
- Natural Science Foundation of Anhui Higher Education Institution of China [KJ2019A0734, KJ2017A924, KJ2017A002, KJ2019A0735]
- Natural Science Foundation of Anhui Province [1808085QE126]
- Universities Joint Key Laboratory of Photoelectric Detection Science and Technology in Anhui Province [2020GDTCZD01]
- Provincial quality engineering project of colleges and universities in Anhui Province [2020jxtd210]
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Ni,Co-MOFs were synthesized by a simple hydrothermal method, and subsequently transformed into Co,Ni/N-doped porous carbon via pyrolysis. Among the samples, Co-1-Ni-0.5/NC exhibited the largest BET surface area, highest electrocatalytic activity for HER, and potential for overall water splitting applications.
Ni,Co-MOFs have been synthetized by a simple hydrothermal method. Subsequently, Co,Ni/N-doped porous carbon have been prepared by pyrolysis method using the Ni,Co-MOFs as precursor. The results show that the samples present high degree of graphitization. The Co-1-Ni-0.5/NC possesses the largest BET surface area (94.73 m(2)/g) and pore volume (0.456 cm(3)/g). The Co-1-Ni-0.5/NC presents the smallest HER overpotential (179 mV) and the best electrocatalytic activity for HER. The Co-0.5-Ni-0.5/NC and Co-1-Ni-0.5/NC have the relatively low overpotential for OER, which are about 348 mV and 383 mV, respectively. The smallest Tafel slope value indicates that Co-1-Ni-0.5/NC presents the best electrocatalytic reactive kinetics. Excellent electrocatalytic performance may be attributed to the more active sites, the higher specific surface area and mesopores as well as the lower charge-transfer resistance. The excellent HER and OER of Co-1-Ni-0.5/NC make its potential to be used on overall water splitting.
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