N- and S- co-doped graphene sheet-encapsulated Co9S8 nanomaterials as excellent electrocatalysts for the oxygen evolution reaction

N,S-Doped hollow carbon nanosheet-encapsulated Co9S8 nanoparticles as a highly efficient bifunctional electrocatalyst for rechargeable zinc–air batteries

“…Previous studies have shown that Co 9 S 8 -based catalysts have promising catalytic activity in the OER. 35,36,47 In this work, Co 9 S 8 /NSC-3 had the lowest potential (1.58 V) compared with Co 9 S 8 /NSC-1 (1.74 V), Co 9 S 8 /NSC-5 (1.66 V), and the RuO 2 catalyst (1.60 V), indicating the superior OER efficiency of Co 9 S 8 /NSC-3. In fact, the degree of vulcanization is one of the most important factors for the OER performance of the catalysts derived from ZIFs with a specific curing time and carbonization temperature.…”

“…34 The higher I D /I G value of Co 9 S 8 /NSC-3 is indicative of the enhanced defects resulting from the introduction of sulfur and which are helpful to improve the electrocatalytic activity. 35 In addition, the weak peak at about 680 cm −1 of Co 9 S 8 /NSC-3 belongs to the Co 9 S 8 phase, further confirming the formation of Co 9 S 8 in Co 9 S 8 /NSC-3. 36 The surface chemical composition and bond configuration of the Co 9 S 8 /NSC-3 composite was revealed using X-ray photoelectron spectroscopy (XPS).…”

微纳结构过渡金属化合物能源转化电催化剂研究进展

“…Transition metal sulfides have shown unique physicochemical properties and a significantly enhanced conductivity compared with metal oxides, which make them promising candidates for many electrochemical applications [56][57][58][59][60][61][62][63]. Due to the higher electronegativity, the S sites in the sulfides can withdraw electrons from the metals and then act as efficient active sites for reactant adsorption and activation [64].…”

Bimetal Metal‐Organic Frameworks Derived Hierarchical Porous Cobalt@Nitrogen‐Doped Carbon Tubes as An Efficient Electrocatalyst for Oxygen Reduction Reaction

“…In the past decades, tremendous efforts have gone into the development of non‐noble metal‐based electrocatalysts for ORR, such as metal oxides, [10] layered double hydroxides, nitrides, [11] carbides, and chalcogenides [12–14] . Among them, transition metal‐based N‐doped porous carbon composites are regarded as more promising alternatives due to their low cost, remarkable electrocatalytic activity and stability [5,15] .…”

“…In the past decades, tremendous efforts have gone into the development of non-noble metal-based electrocatalysts for ORR, such as metal oxides, [10] layered double hydroxides, nitrides, [11] carbides, and chalcogenides. [12][13][14] Among them, transition metal-based N-doped porous carbon composites are regarded as more promising alternatives due to their low cost, remarkable electrocatalytic activity and stability. [5,15] In this regard, zeolitic imidazolate frameworks (ZIFs), constructed by metal ions and nitrogen-involved organic ligands, have aroused widespread concern to fabricate porous carbon-based electrocatalysts because of their tunable morphology, large surface areas and high nitrogen content.…”