Journal ArticleDOI
Enhanced Hydrogen Evolution Catalysis from Chemically Exfoliated Metallic MoS2 Nanosheets
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TLDR
Structural characterization and electrochemical studies confirmed that the nanosheets of the metallic MoS2 polymorph exhibit facile electrode kinetics and low-loss electrical transport and possess a proliferated density of catalytic active sites, which make these metallic nanOSheets a highly competitive earth-abundant HER catalyst.Abstract:
Promising catalytic activity from molybdenum disulfide (MoS2) in the hydrogen evolution reaction (HER) is attributed to active sites located along the edges of its two-dimensional layered crystal structure, but its performance is currently limited by the density and reactivity of active sites, poor electrical transport, and inefficient electrical contact to the catalyst. Here we report dramatically enhanced HER catalysis (an electrocatalytic current density of 10 mA/cm2 at a low overpotential of −187 mV vs RHE and a Tafel slope of 43 mV/decade) from metallic nanosheets of 1T-MoS2 chemically exfoliated via lithium intercalation from semiconducting 2H-MoS2 nanostructures grown directly on graphite. Structural characterization and electrochemical studies confirmed that the nanosheets of the metallic MoS2 polymorph exhibit facile electrode kinetics and low-loss electrical transport and possess a proliferated density of catalytic active sites. These distinct and previously unexploited features of 1T-MoS2 make ...read more
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Combining theory and experiment in electrocatalysis: Insights into materials design
Zhi Wei Seh,Zhi Wei Seh,Zhi Wei Seh,Jakob Kibsgaard,Jakob Kibsgaard,Jakob Kibsgaard,Colin F. Dickens,Colin F. Dickens,Ib Chorkendorff,Jens K. Nørskov,Jens K. Nørskov,Thomas F. Jaramillo,Thomas F. Jaramillo +12 more
TL;DR: A unified theoretical framework highlights the need for catalyst design strategies that selectively stabilize distinct reaction intermediates relative to each other, and opens up opportunities and approaches to develop higher-performance electrocatalysts for a wide range of reactions.
Journal ArticleDOI
Noble metal-free hydrogen evolution catalysts for water splitting
Xiaoxin Zou,Yu Zhang +1 more
TL;DR: This review highlights the recent research efforts toward the synthesis of noble metal-free electrocatalysts, especially at the nanoscale, and their catalytic properties for the hydrogen evolution reaction (HER), and summarizes some important examples showing that non-Pt HER electrocatsalysts could serve as efficient cocatalysts for promoting direct solar-to-hydrogen conversion in both photochemical and photoelectrochemical water splitting systems, when combined with suitable semiconductor photocatalyst.
Journal ArticleDOI
Recent Advances in Ultrathin Two-Dimensional Nanomaterials
Chaoliang Tan,Xiehong Cao,Xiehong Cao,Xue-Jun Wu,Qiyuan He,Jian Yang,Xiao Zhang,Junze Chen,Wei Zhao,Shikui Han,Gwang-Hyeon Nam,Melinda Sindoro,Hua Zhang +12 more
TL;DR: The unique advances on ultrathin 2D nanomaterials are introduced, followed by the description of their composition and crystal structures, and the assortments of their synthetic methods are summarized.
Journal ArticleDOI
Controllable Disorder Engineering in Oxygen-Incorporated MoS2 Ultrathin Nanosheets for Efficient Hydrogen Evolution
Junfeng Xie,Jiajia Zhang,Shuang Li,Fabian Grote,Xiaodong Zhang,Hao Zhang,Ruoxing Wang,Yong Lei,Bicai Pan,Yi Xie +9 more
TL;DR: This work demonstrates the successfully synergistic regulations of both structural and electronic benefits by controllable disorder engineering and simultaneous oxygen incorporation in MoS2 catalysts, leading to the dramatically enhanced HER activity.
Journal ArticleDOI
Activating and optimizing MoS2 basal planes for hydrogen evolution through the formation of strained sulphur vacancies
Hong Li,Charlie Tsai,Ai Leen Koh,Lili Cai,Alex W. Contryman,Alex W. Contryman,Alex H. Fragapane,Alex H. Fragapane,Jiheng Zhao,Hyun Soon Han,Hari C. Manoharan,Hari C. Manoharan,Frank Abild-Pedersen,Jens K. Nørskov,Jens K. Nørskov,Xiaolin Zheng +15 more
TL;DR: This work reports the first activation and optimization of the basal plane of monolayer 2H-MoS2 for HER by introducing sulphur (S) vacancies and strain, which allows it to achieve the highest intrinsic HER activity among molybdenum-sulphide-based catalysts.
References
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