Layered Crystalline and Amorphous Platinum Disulfide (PtS2): Contrasting Electrochemistry

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F19%3A43918113" target="_blank" >RIV/60461373:22310/19:43918113 - isvavai.cz</a>

Alternative codes found

RIV/00216305:26620/19:PU133197

Result on the web

<a href="https://onlinelibrary.wiley.com/doi/abs/10.1002/chem.201900331" target="_blank" >https://onlinelibrary.wiley.com/doi/abs/10.1002/chem.201900331</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/chem.201900331" target="_blank" >10.1002/chem.201900331</a>

Result language

angličtina

Original language name

Layered Crystalline and Amorphous Platinum Disulfide (PtS2): Contrasting Electrochemistry

Original language description

Group 6 transition metal dichalcogenides (TMDs), such as MoS2 and WS2 have been extensively studied for various applications while few studies have delved into other TMDs such as platinum dichalcogenides. In this work, layered crystalline and amorphous platinum disulfide (PtS2) were synthesized, characterised and their fundamental electrochemical properties were investigated. Both materials exhibited inherent oxidation and reduction reactions which would limit their operating potential window for sensing applications. Amorphous phase materials are considered to be promising electrocatalysts due to the porous, and nanostructured morphology with high concentration of unsaturated active sites. The electrocatalytic performances towards oxygen reduction (ORR) and hydrogen evolution reactions (HER) of crystalline and amorphous PtS2 were analysed. Amorphous PtS2 was found to exhibit superior electrocatalytic performances towards ORR and HER as compared to crystalline PtS2. For HER, amorphous and crystalline PtS2 have overpotential values of 0.30 V and 0.70 V (vs. RHE) at current density of 10 mA cm(-2), respectively. The influence of electrochemical reduction pre-treatment on their catalytic behaviours was also investigated. Electrochemical reduction pre-treatment on both crystalline and amorphous PtS2 removed the oxidized sulfate groups and increased the proportion of Pt-0 oxidation state which exposed more catalytic sites. As such, these materials were activated and displayed improved ORR and HER performances. Electrochemically reduced amorphous PtS2 outperformed the untreated counterparts and exhibited the best HER performance with overpotential of 0.17 V (vs. RHE) at current density of -10 mA cm(-2). These findings provide insights into the electrochemical properties of noble metal PtS2 in both crystalline and amorphous states which can be activated by electrochemical reduction pre-treatment.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

<a href="/en/project/GX19-26896X" target="_blank" >GX19-26896X: 2D Nanomaterials Electrochemistry</a><br>

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Chemistry A European Journal

ISSN

0947-6539

e-ISSN

—

Volume of the periodical

25

Issue of the periodical within the volume

30

Country of publishing house

DE - GERMANY

Number of pages

9

Pages from-to

7330-7338

UT code for WoS article

000469274700015

EID of the result in the Scopus database

2-s2.0-85065437597