Facile Fabrication of Ni9S8/Ag2S Intertwined Structures for Oxygen and Hydrogen Evolution Reactions

被引：17
作者：
Biswas, Rathindranath [1 ]
Ahmed, Imtiaz [1 ]
Manna, Priyanka [2 ]
Mahata, Partha [2 ]
Dhayal, Rajendra S. [1 ]
Singh, Amol [3 ]
Lahtinen, Jouko [4 ]
Haldar, Krishna Kanta [1 ]
机构：
[1] Cent Univ Punjab, Dept Chem, Bathinda 151401, India
[2] Jadavpur Univ, Dept Chem, Kolkata 700032, India
[3] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan
[4] Aalto Univ Sch Sci, Dept Appl Phys, Aalto 00076, Finland
来源：
CHEMPLUSCHEM | 2023年 / 88卷 / 01期
关键词：
Electrocatalysis; hydrogen evolution reaction; interfacial charge transfer; oxygen evolution reaction; sulfides; CORE-SHELL NANOPARTICLES; GREEN APPROACH; BIFUNCTIONAL ELECTROCATALYST; NICKEL METAL; COBALT; COMPLEXES; HYDROXIDE; HETEROSTRUCTURE; CATALYST; MOIETIES;
D O I：
10.1002/cplu.202200320
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Here, we report the fabrication of the unique intertwined Ni9S8/Ag2S composite structure with hexagonal shape from their molecular precursors by one-pot thermal decomposition. Various spectroscopic and microscopic techniques were utilized to confirm the Ni9S8/Ag2S intertwined structure. Powder X-ray Powder Diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis suggest that there is an enrichment of Ni9S8 phase in Ni9S8/Ag2S. The presence of Ag2S in Ni9S8/Ag2S improves the conductivity by reducing the interfacial energy and charge transfer resistance. When Ni9S8/Ag2S is employed as an electrocatalyst for electrochemical oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) activity, it requires a low overpotential of 152 mV for HER and 277 mV for OER to obtain the geometrical current density of 10 mA cm(-2), which is definitely superior to that of its components Ni9S8 and Ag2S. This work provides a simple design route to develop an efficient and durable electrocatalyst with outstanding OER and HER performance and the present catalyst (Ni9S8/Ag2S) deserves as a potential candidate in the field of energy conversion systems.
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页数：9
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