Journal ArticleDOI
Molybdenum Carbide-Oxide Heterostructures: In Situ Surface Reconfiguration toward Efficient Electrocatalytic Hydrogen Evolution.
TLDR
Heterostructured Mo 2 C-MoO x on carbon cloth, as a model of easily oxidized electrocatalysts under ambient conditions, is investigated to uncover surface reconfiguration during hydrogen evolution reaction (HER), and consistent in-situ surface reconfigured and promotion are proved.Abstract:
Heterostructured Mo2 C-MoOx on carbon cloth (Mo2 C-MoOx /CC), as a model of easily oxidized electrocatalysts under ambient conditions, is investigated to uncover surface reconfiguration during the hydrogen evolution reaction (HER). Raman spectroscopy combined with electrochemical tests demonstrates that the MoVI oxides on the surface are in situ reduced to MoIV , accomplishing promoted HER in acidic condition. As indicated by density functional theoretical calculations, the in situ reduced surface with terminal Mo=O moieties can effectively bring the negative ΔGH* on bare Mo2 C close to a thermodynamic neutral value, addressing difficult H* desorption toward fast HER kinetics. The optimized Mo2 C-MoOx /CC only requires a low overpotential (η10 ) of 60 mV at -10 mA cm-2 in 1.0 m HClO4 , outperforming Mo2 C/CC and most non-precious electrocatalysts. In situ surface reconfiguration are shown on W2 C-WOx , highlighting the significance to boost various metal-carbides and to identify active sites.read more
Citations
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Journal ArticleDOI
Two-Dimensional Porous Molybdenum Phosphide/Nitride Heterojunction Nanosheets for pH-Universal Hydrogen Evolution Reaction
Ying Gu,Aiping Wu,Yanqing Jiao,Huiru Zheng,Xueqi Wang,Ying Xie,Lei Wang,Chungui Tian,Honggang Fu,Honggang Fu +9 more
TL;DR: In this paper, a new strategy for the synthesis of 2D porous MoP/Mo2 N heterojunction nanosheets based on pyrolysis of a 2D [PMo12 O40 ]3-melamine (PMo 12 -MA) nanosheet precursor from a polyethylene glycol (PEG)-mediated assembly route is presented.
Journal ArticleDOI
Coupling Magnetic Single‐Crystal Co 2 Mo 3 O 8 with Ultrathin Nitrogen‐Rich Carbon Layer for Oxygen Evolution Reaction
TL;DR: Combined HAADFSTEM, magnetic and computational results show that the vital factors influencing the OER performance of the catalyst can be attributed to the tetrahedral Co sites (high spin, t 2 3 e 4 ), which improve the O ER kinetics of rate-determining step to form *OOH.
Journal ArticleDOI
Comprehensive Understandings into Complete Reconstruction of Precatalysts: Synthesis, Applications, and Characterizations.
TL;DR: This review systematically summarizes several important advances in complete reconstruction for the first time, which includes fundamental understandings of complete reconstruction, the characteristics and advantages of completely reconstructed catalysts, and their design principles.
Journal ArticleDOI
2H-MoS2 on Mo2CTx MXene Nanohybrid for Efficient and Durable Electrocatalytic Hydrogen Evolution.
Kang Rui Garrick Lim,Albertus D. Handoko,Luke R. Johnson,Xing Meng,Xing Meng,Ming Lin,Gomathy Sandhya Subramanian,Babak Anasori,Yury Gogotsi,Aleksandra Vojvodic,Zhi Wei Seh +10 more
TL;DR: The exceptional HER durability of the Mo2CTx/2H-MoS2 nanohybrid presents a major step forward to realize practical implementation of MXenes as noble metal free catalysts for broad-based applications in water splitting and energy conversion.
Journal ArticleDOI
Perfecting electrocatalysts via imperfections: towards the large-scale deployment of water electrolysis technology
TL;DR: In this paper, the authors summarized recent progress relating to the regulation of electrical behavior and electron distributions for the optimization of electrocatalytic water-splitting performance via defect engineering.
References
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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
Earth-abundant catalysts for electrochemical and photoelectrochemical water splitting
TL;DR: In this article, the authors investigate progress towards photo-electrocatalytic water-splitting systems, with special emphasis on how they might be incorporated into photoelectrocaralyst systems.
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
Nanostructured hydrotreating catalysts for electrochemical hydrogen evolution
TL;DR: An overview of recent developments in the non-noble metal catalysts for electrochemical hydrogen evolution reaction (HER) is presented, with emphasis on the nanostructuring of industrially relevant hydrotreating catalysts as potential HER electrocatalysts.
Journal ArticleDOI
Emerging Two-Dimensional Nanomaterials for Electrocatalysis
Huanyu Jin,Chunxian Guo,Xin Liu,Jinlong Liu,Anthony Vasileff,Yan Jiao,Yao Zheng,Shi-Zhang Qiao +7 more
TL;DR: The fundamental relationships between electronic structure, adsorption energy, and apparent activity for a wide variety of 2D electrocatalysts are described with the goal of providing a better understanding of these emerging nanomaterials at the atomic level.
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