Journal ArticleDOI
Ternary Porous Cobalt Phosphoselenide Nanosheets: An Efficient Electrocatalyst for Electrocatalytic and Photoelectrochemical Water Splitting.
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TLDR
This study demonstrates a novel ternary electrocatalyst of porous cobalt phosphoselenide nanosheets prepared by a combined hydrogenation and phosphation strategy that facilitates a rapid charge transfer and optimal energy barrier of hydrogen desorption, and thus promoting the proton kinetics.Abstract:
Exploring efficient and earth-abundant electrocatalysts is of great importance for electrocatalytic and photoelectrochemical hydrogen production. This study demonstrates a novel ternary electrocatalyst of porous cobalt phosphoselenide nanosheets prepared by a combined hydrogenation and phosphation strategy. Benefiting from the enhanced electric conductivity and large surface area, the ternary nanosheets supported on electrochemically exfoliated graphene electrodes exhibit excellent catalytic activity and durability toward hydrogen evolution in alkali, achieving current densities of 10 and 20 mA cm−2 at overpotentials of 150 and 180 mV, respectively, outperforming those reported for transition metal dichalcogenides and first-row transition metal pyrites catalysts. Theoretical calculations reveal that the synergistic effects of Se vacancies and subsequent P displacements of Se atoms around the vacancies in the resulting cobalt phosphoselenide favorably change the electronic structure of cobalt selenide, assuring a rapid charge transfer and optimal energy barrier of hydrogen desorption, and thus promoting the proton kinetics. The overall-water-splitting with 10 mA cm−2 at a low voltage of 1.64 V is achieved using the ternary electrode as both the anode and cathode, and the performance surpasses that of the Ir/C–Pt/C couple for sufficiently high overpotentials. Moreover, the integration of ternary nanosheets with macroporous silicon enables highly efficient solar-driven photoelectrochemical hydrogen production.read more
Citations
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Journal ArticleDOI
Biomass-derived porous carbon materials with different dimensions for supercapacitor electrodes: a review
Zhihong Bi,Qingqiang Kong,Yufang Cao,Guohua Sun,Fangyuan Su,Xianxian Wei,Xiaoming Li,Aziz Ahmad,Lijing Xie,Cheng-Meng Chen +9 more
TL;DR: In this article, a series of novel porous carbon materials with different dimensions have been prepared by various methods using biomass as the raw material, which is an important field in the fabrication of supercapacitor electrode materials.
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Efficient Hydrogen Evolution on Cu Nanodots-Decorated Ni3S2 Nanotubes by Optimizing Atomic Hydrogen Adsorption and Desorption.
TL;DR: The strong interactions between Cu and Ni3S2 cause the Cu NDs/Ni 3S2 NTs-CFs electrocatalysts to exhibit the outstanding HER catalytic performance with low onset potential, high catalytic activity, and excellent stability.
Journal ArticleDOI
Necklace-like Multishelled Hollow Spinel Oxides with Oxygen Vacancies for Efficient Water Electrolysis.
Shengjie Peng,Shengjie Peng,Feng Gong,Linlin Li,Deshuang Yu,Dongxiao Ji,Tianran Zhang,Zhe Hu,Zhiqiang Zhang,Shulei Chou,Yonghua Du,Seeram Ramakrishna +11 more
TL;DR: A novel "adsorption-calcination-reduction" strategy to synthesize spinel transitional metal oxides with a unique necklace-like multishelled hollow structure exploiting sacrificial templates of carbonaceous microspheres, which could prove to be an effective general strategy for the preparation of complex, hollow structures and functionalities.
Journal ArticleDOI
Efficient alkaline hydrogen evolution on atomically dispersed Ni–Nx Species anchored porous carbon with embedded Ni nanoparticles by accelerating water dissociation kinetics
Chaojun Lei,Yu Wang,Yang Hou,Pan Liu,Jian Yang,Tao Zhang,Xiaodong Zhuang,Mingwei Chen,Bin Yang,Lecheng Lei,Chris Yuan,Ming Qiu,Xinliang Feng +12 more
TL;DR: In this paper, a hybrid electrocatalyst comprising atomically dispersed Ni−Nx species anchored porous carbon (Ni-N-C) matrix with embedded Ni nanoparticles for hydrogen evolution reaction (HER) during alkaline water electrolysis is reported.
Journal ArticleDOI
Porous carbon nanosheets: Synthetic strategies and electrochemical energy related applications
TL;DR: In this article, a review article comprehensively summarizes the recent developments in synthetic methods, including the hard template strategy, soft template strategy and template-free strategy for successful preparation of carbon nanosheets.
References
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PatentDOI
Metal-free bifunctional electrocatalyst for oxygen reduction and oxygen evolution reactions
TL;DR: A mesoporous carbon foam co-doped with nitrogen and phosphorus that has a large surface area and good electrocatalytic properties for both ORR and OER and is tested as an air electrode for primary and rechargeable Zn-air batteries.