scholarly journals Electrochemical maps and movies of the hydrogen evolution reaction on natural crystals of molybdenite (MoS2): basal vs. edge plane activity

2017 ◽  
Vol 8 (9) ◽  
pp. 6583-6593 ◽  
Author(s):  
Cameron L. Bentley ◽  
Minkyung Kang ◽  
Faduma M. Maddar ◽  
Fengwang Li ◽  
Marc Walker ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Basal Plane ◽  
Spatially Resolved ◽  
Voltammetric Measurements

In this work, we report the first spatially-resolved voltammetric measurements of the hydrogen evolution reaction on natural crystals of molybdenite, unequivocally demonstrating enhanced catalytic activity on the edge plane relative to the basal plane.

Transition metal doping activated basal-plane catalytic activity of two-dimensional 1T’-ReS2 for hydrogen evolution reaction: a first-principles calculation study

Nanoscale ◽  
2019 ◽  
Vol 11 (21) ◽  
pp. 10402-10409 ◽  
Author(s):  
Jing Pan ◽  
Rui Wang ◽  
Xiaoyong Xu ◽  
Jingguo Hu ◽  
Liang Ma
Keyword(s):  
Catalytic Activity ◽  
Transition Metal ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
First Principles ◽  
Basal Plane ◽  
First Principles Calculation ◽  
Transition Metal Doping ◽  
Two Dimensional ◽  
Cr Doping

Non-noble transition metals Mo and Cr doping greatly enhances the basal-plane catalytic activity of two-dimensional 1T′-ReS2 for hydrogen evolution reaction as comparable with those of Pt-doping.

scholarly journals Basal-Plane Catalytic Activity of Layered Metallic Transition Metal Ditellurides for the Hydrogen Evolution Reaction

2020 ◽  
Vol 10 (9) ◽  
pp. 3087 ◽  
Author(s):  
Hagyeong Kwon ◽  
Dongyeon Bae ◽  
Hyeyoung Jun ◽  
Byungdo Ji ◽  
Dongyeun Won ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Transition Metal ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Basal Plane ◽  
Transition Metal Dichalcogenides ◽  
Charge Transfer Resistance ◽  
Transfer Resistance ◽  
Metal Dichalcogenides ◽  
Turn Over Frequency

We report the electrochemical hydrogen evolution reaction (HER) of two-dimensional metallic transition metal dichalcogenides (TMDs). TMTe2 (TM: Mo, W, and V) single crystals were synthesized and characterized by optical microscopy, X-ray diffraction, and electrochemical measurements. We found that TMTe2 acts as a HER-active catalyst due to the inherent catalytic activity of its basal planes. Among the three metallic TMTe2, VTe2 shows the best HER performance with an overpotential of 441 mV and a Tafel slope of 70 mV/dec. It is 668 mV and 137 mV/dec for MoTe2 and 692 mV and 169 mV/dec for WTe2. Even though VTe2 has the lowest values in the exchange current density, the active site density, and turn-over-frequency (TOF) among the three TMTe2, the lowest charge transfer resistance (RCT) of VTe2 seems to be critical to achieving the best HER performance. First-principles calculations revealed that the basal-plane-active HER performance of metallic TMDs can be further enhanced with some Te vacancies. Our study paves the way to further study of the inherent catalytic activity of metallic 2D materials for active hydrogen production.

Tuning the catalytic activity of heterogeneous two-dimensional transition metal dichalcogenides for hydrogen evolution

2018 ◽  
Vol 6 (41) ◽  
pp. 20005-20014 ◽  
Author(s):  
Seung Hyo Noh ◽  
Jeemin Hwang ◽  
Joonhee Kang ◽  
Min Ho Seo ◽  
Daehyeon Choi ◽  
...  
Keyword(s):  
Big Data ◽  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Basal Plane ◽  
Active Sites ◽  
Catalytic Properties ◽  
Transition Metal Dichalcogenides ◽  
Two Dimensional ◽  
Metal Dichalcogenides

This study establishes big data for the catalytic properties of two-dimensional metal-dichalcogenides (2D-TMDs) toward the hydrogen evolution reaction (HER). In addition to conventionally known active sites of edges, it proposes that terrace sites (or the basal plane) can be substantially activated for the HER.

Synergetic Effect of Ni2P and MXene Enhances Catalytic Activity in the Hydrogen Evolution Reaction

2021 ◽  
Vol 60 (3) ◽  
pp. 1604-1611
Author(s):  
Zepeng Lv ◽  
Meng Wang ◽  
Dong Liu ◽  
Kailiang Jian ◽  
Run Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Synergetic Effect

scholarly journals Catalytic activity of Co-nanocrystal-doped tungsten carbide arising from an internal magnetic field

RSC Advances ◽  
2021 ◽  
Vol 11 (23) ◽  
pp. 14063-14070
Author(s):  
M. Morishita ◽  
A. Nozaki ◽  
H. Yamamoto ◽  
N. Fukumuro ◽  
M. Mori ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Catalytic Activity ◽  
Tungsten Carbide ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Pt Nanoparticles ◽  
Internal Magnetic Field ◽  
Co Doped

The catalytic activity of the Co-doped WC is 30% higher than that of Pt nanoparticles for the hydrogen evolution reaction arising from an internal magnetic field.

Hierarchical molybdenum-doped NiCoP@carbon microspheres: A highly-efficient electrocatalyst for hydrogen evolution reaction

2021 ◽  
Author(s):  
Changhai Liu ◽  
Yanhua Yao ◽  
Lei Sun ◽  
Linlin Luo ◽  
Wenchang Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Carbon Microspheres ◽  
Fast Kinetics ◽  
Highly Efficient

Herein, we present hierarchical Mo-doped NiCoP@carbon microspheres, which exhibits noticeable enhancement of catalytic activity and fast kinetics for hydrogen evolution. An overpotentials of 74.6 mV at 10 mA cm-2 and...

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