Valence and oxide impurities in MoS2 and WS2 dramatically change their electrocatalytic activity towards proton reduction

Nanoscale ◽  
2016 ◽  
Vol 8 (37) ◽  
pp. 16752-16760 ◽  
Author(s):  
Naziah Mohamad Latiff ◽  
Lu Wang ◽  
Carmen C. Mayorga-Martinez ◽  
Zdeněk Sofer ◽  
Adrian C. Fisher ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Electrocatalytic Activity ◽  
Proton Reduction

Here, we show that presence of valence sulfide impurities (i.e. MoS3 and WS3), and oxide counterparts (i.e. MoO2, MoO3 and WO2, WO3) of MoS2 and WS2 can contribute to the catalytic activity towards hydrogen production.

Ultrasmall diiron phosphide nanodots anchored on graphene sheets with enhanced electrocatalytic activity for hydrogen production via high-efficiency water splitting

2016 ◽  
Vol 4 (41) ◽  
pp. 16028-16035 ◽  
Author(s):  
Huawei Huang ◽  
Chang Yu ◽  
Juan Yang ◽  
Xiaotong Han ◽  
Changtai Zhao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Active Site ◽  
Electrocatalytic Activity ◽  
High Efficiency ◽  
Graphene Sheets

Active site-enriched Fe2P nanodots anchored on graphene sheets (Fe2P-ND/FG) exhibit enhanced catalytic activity and stability for the hydrogen evolution reaction.

Photocatalytic hydrogen generation using mesoporous silicon nanoparticles: influence of magnesiothermic reduction conditions and nanoparticle aging on the catalytic activity

Nanoscale ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 2685-2692
Author(s):  
Isabel S. Curtis ◽  
Ryan J. Wills ◽  
Mita Dasog
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Silicon Nanoparticles ◽  
Hydrogen Generation ◽  
Oxide Content ◽  
Magnesiothermic Reduction ◽  
Mesoporous Silicon ◽  
High Crystallinity ◽  
Photocatalytic Hydrogen Generation

High crystallinity, low oxide content, and low sintering lead to optimally performing mesoporous Si photocatalysts for solar-driven hydrogen production.

scholarly journals Novel Ti3C2Tx MXene Nanozyme with Manageable Catalytic Activity and Application to Electrochemical Biosensor

2021 ◽  
Author(s):  
Rongjun Yu ◽  
Jian Xue ◽  
Yang Wang ◽  
Jingfu Qiu ◽  
Xinyi Huang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Electrocatalytic Activity ◽  
Electrochemical Biosensor ◽  
Fusion Gene ◽  
Myelogenous Leukemia ◽  
Hydroxyl Group ◽  
The Novel ◽  
Gene Detection ◽  
Adsorption Effect ◽  
Amplification Strategy

Abstract In this work, Ti3C2Tx MXene was identified as efficient nanozyme with area-dependent electrocatalytic activity in oxidation of phenolic compounds, which originated from the strong adsorption effect between the phenolic hydroxyl group and the oxygen atom on the surface of Ti3C2Tx MXene flake. On the basis of the novel electrocatalytic activity, Ti3C2Tx MXene was combined with alkaline phosphatase to construct a novel cascading catalytic amplification strategy using 1-naphthyl phosphate (1-NPP) as substrate, thereby realizing efficient electrochemical signal amplification. Taking advantage of the novel cascading catalytic amplification strategy, an electrochemical biosensor was fabricated for BCR/ABL fusion gene detection, which achieved excellent sensitivity with linear range from 0.2 fM to 20 nM and limit of detection down to 0.05 fM. This biosensor provided a promising tool for ultrasensitive fusion gene detection in early diagnosis of chronic myelogenous leukemia and acute lymphocytic leukemia. Moreover, the manageable catalytic activity of MXene broke a path for developing nanozymes, which possessed enormous application potential in not only electrochemical analysis but also the extensive fields including organic synthesis, pollutant disposal and so on.

Electrophoretic Deposition of Nanoparticles as Electrocatalysts for Electrolysis in the Solar Sulfur Ammonia Hydrogen Production

2015 ◽  
Vol 654 ◽  
pp. 76-82
Author(s):  
Nicole S. Pacheco ◽  
Neil Verma ◽  
Komail Haider ◽  
Jan B. Talbot
Keyword(s):  
Hydrogen Production ◽  
Ammonium Sulfate ◽  
Electrophoretic Deposition ◽  
Electrocatalytic Activity ◽  
Cobalt Ferrite ◽  
Ferrite Nanoparticles ◽  
Thermochemical Cycle ◽  
Cobalt Ferrite Nanoparticles ◽  
Ammonium Sulfite

Cobalt ferrite nanoparticles were deposited using electrophoretic deposition from two different bath chemistries, 90 vol.% water and 10 vol.% isopropanol with hexadecyltrimethlyammonium bromide (CTAB) and 100 % ethanol. The deposits were tested for electrocatalytic activity for the oxidation of ammonium sulfite to ammonium sulfate as part of a solar sulfur ammonia thermochemical cycle to produce hydrogen.

scholarly journals Evidence for photosensitised hydrogen production from water in the absence of precious metals, redox-mediators and co-catalysts

2017 ◽  
Vol 19 (12) ◽  
pp. 8141-8147 ◽  
Author(s):  
S. Salzl ◽  
M. Ertl ◽  
G. Knör
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Precious Metals ◽  
Redox Mediators ◽  
Salt Solutions ◽  
Proton Reduction ◽  
Photocatalytic Hydrogen Evolution ◽  
Co Catalysts ◽  
Aqueous Salt Solutions ◽  
Earth Abundant

New approaches for sunlight-powered proton reduction and photocatalytic hydrogen evolution from aqueous salt solutions using earth-abundant components and molecular photosensitisers.

A metal–organic framework with in situ generated low-coordinate binuclear Cu(i) units as a highly effective catalyst for photodriven hydrogen production

2020 ◽  
Vol 56 (49) ◽  
pp. 6700-6703
Author(s):  
Ning-Yu Huang ◽  
Hai He ◽  
Hao Li ◽  
Pei-Qin Liao ◽  
Xiao-Ming Chen
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Synergistic Effect ◽  
Metal Organic Framework ◽  
High Catalytic Activity ◽  
Binuclear Copper ◽  
Metal Organic ◽  
Cu Ions ◽  
Organic Framework

Here, we report a metal–organic framework featuring a binuclear copper unit, showing extraordinarily high catalytic activity (102.8 mmol g−1 h−1) for photodriven H2 generation, which is attributed to the synergistic effect between the two Cu ions.

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