Doughty-electronegative heteroatom-induced defective MoS2 for the hydrogen evolution reaction

Luo, Shengdao; Duan, Wei; Zhang, Xu; Han, Sang-Moon; Liu, Yipu; Yang, Ling; Lin, Shiwei

doi:10.3389/fchem.2022.1064752

Cited by 8 publications

(3 citation statements)

References 46 publications

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“…There were no other peaks belonging to cobalt sulfate or cobalt nitrate in the Raman spectrum, which indicated that the crystal structure of Co 3 O 4 remained unchanged after the introduction of N and S heteroatoms. Additionally, a small shift at A 1g could be observed, which could be attributed to the different electronegativity [ 48 ] of the introduced N and S heteroatoms.…”

Section: Resultsmentioning

confidence: 99%

In Situ Filling of the Oxygen Vacancies with Dual Heteroatoms in Co3O4 for Efficient Overall Water Splitting

et al. 2023

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Electrocatalytic water splitting is a crucial area in sustainable energy development, and the development of highly efficient bifunctional catalysts that exhibit activity toward both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is of paramount importance. Co3O4 is a promising candidate catalyst, owing to the variable valence of Co, which can be exploited to enhance the bifunctional catalytic activity of HER and OER through rational adjustments of the electronic structure of Co atoms. In this study, we employed a plasma-etching strategy in combination with an in situ filling of heteroatoms to etch the surface of Co3O4, creating abundant oxygen vacancies, while simultaneously filling them with nitrogen and sulfur heteroatoms. The resulting N/S-VO-Co3O4 exhibited favorable bifunctional activity for alkaline electrocatalytic water splitting, with significantly enhanced HER and OER catalytic activity compared to pristine Co3O4. In an alkaline overall water-splitting simulated electrolytic cell, N/S-VO-Co3O4 || N/S-VO-Co3O4 showed excellent overall water splitting catalytic activity, comparable to noble metal benchmark catalysts Pt/C || IrO2, and demonstrated superior long-term catalytic stability. Additionally, the combination of in situ Raman spectroscopy with other ex situ characterizations provided further insight into the reasons behind the enhanced catalyst performance achieved through the in situ incorporation of N and S heteroatoms. This study presents a facile strategy for fabricating highly efficient cobalt-based spinel electrocatalysts incorporated with double heteroatoms for alkaline electrocatalytic monolithic water splitting.

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Section: Resultsmentioning

confidence: 99%

In Situ Filling of the Oxygen Vacancies with Dual Heteroatoms in Co3O4 for Efficient Overall Water Splitting

et al. 2023

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“…Recently, many researchers have developed doping strategies for high-efficiency electrocatalysts, which could principally modulate the electronic structure, thus enhancing the electrocatalytic activity ( Xiao et al, 2022 ). Considering the important role of phosphorus (P) doping in improving the electrical conductivity and enhancing the intrinsic activity of metal catalysts, works related to monometallic and bimetallic phosphides, including the engineering of heterojunctions for potential TMP catalysts and phosphated bimetallic clusters on macroporous nitrogen-doped carbon, have been explored in recent years ( Ryu et al, 2015 ; Stern et al, 2015 ; Liu et al, 2018a ; Qin et al, 2018 ; Chu et al, 2019 ; Lv et al, 2020 ; Wang et al, 2021b ; Guo et al, 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of amorphous trimetallic PdCuNiP nanoparticles for enhanced OER

Zheng

Guo

Li³

et al. 2023

Front. Chem.

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Metal phosphides with multi-element components and amorphous structure represent a novel kind of electrocatalysts for promising activity and durability towards the oxygen evolution reaction (OER). In this work, a two-step strategy, including alloying and phosphating processes, is reported to synthesize trimetallic amorphous PdCuNiP phosphide nanoparticles for efficient OER under alkaline conditions. The synergistic effect between Pd, Cu, Ni, and P elements, as well as the amorphous structure of the obtained PdCuNiP phosphide nanoparticles, would boost the intrinsic catalytic activity of Pd nanoparticles towards a wide range of reactions. These obtained trimetallic amorphous PdCuNiP phosphide nanoparticles exhibit long-term stability, nearly a 20-fold increase in mass activity toward OER compared with the initial Pd nanoparticles, and 223 mV lower in overpotential at 10 mA cm−2. This work not only provides a reliable synthetic strategy for multi-metallic phosphide nanoparticles, but also expands the potential applications of this promising class of multi-metallic amorphous phosphides.

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“…They summarized various strategies for adjusting and modifying the surface defects of catalysts, including intrinsic defects, heteroatom doping, singlemetal-atom sites, vacancies, grain boundaries and lattice defects. (Xiao et al, 2022) successfully introduced the doughtyelectronegative heteroatom defect to MoS 2 through a large-scale and simple ball milling strategy, which can greatly enhance the hydrogen evolution reaction performance.…”

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confidence: 99%