Tailoring electrocatalytic properties of Pt nanoparticles grown on Ti3C2Tx MXene surface

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F19%3A63523438" target="_blank" >RIV/70883521:28110/19:63523438 - isvavai.cz</a>

Výsledek na webu

<a href="http://jes.ecsdl.org/content/166/2/H54.abstract" target="_blank" >http://jes.ecsdl.org/content/166/2/H54.abstract</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1149/2.0991902jes" target="_blank" >10.1149/2.0991902jes</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Tailoring electrocatalytic properties of Pt nanoparticles grown on Ti3C2Tx MXene surface

Popis výsledku v původním jazyce

In this work, the spontaneous and NaBH4-induced reduction of chloroplatinic acid on the surface of Ti3C2TX MXene was investigated to synthesize a hybrid PtNP-decorated MXene nanomaterial (MX-Pt) with potential as hydrogen evolution (HER) or oxygen reduction reaction (ORR) catalyst properties. The initial Pt concentration, reduction time and presence of additional reducing agents were varied, and as-synthesized nanocomposites were characterized thoroughly by XRD, EDX, SEM and XPS analysis and by electrochemical methods. Composites containing 14 wt% Pt showed HER with an onset potential of -75.9 mV and a current density of -10 mA cm(-2) achieved at -226 mV. The spontaneous deposition of PtNPs on MXene improved the electrocatalytic properties over using an external reducing agent to form PtNP, which was explained based on the different rates of oxidation of Ti in the initial MXene support. Furthermore, good stability of the electrode modified by the MX-Pt was achieved without any polymeric binder and the HER reaction achieved only a negligible decrease over 3 000 potentiodynamic cycles.

Název v anglickém jazyce

Tailoring electrocatalytic properties of Pt nanoparticles grown on Ti3C2Tx MXene surface

Popis výsledku anglicky

In this work, the spontaneous and NaBH4-induced reduction of chloroplatinic acid on the surface of Ti3C2TX MXene was investigated to synthesize a hybrid PtNP-decorated MXene nanomaterial (MX-Pt) with potential as hydrogen evolution (HER) or oxygen reduction reaction (ORR) catalyst properties. The initial Pt concentration, reduction time and presence of additional reducing agents were varied, and as-synthesized nanocomposites were characterized thoroughly by XRD, EDX, SEM and XPS analysis and by electrochemical methods. Composites containing 14 wt% Pt showed HER with an onset potential of -75.9 mV and a current density of -10 mA cm(-2) achieved at -226 mV. The spontaneous deposition of PtNPs on MXene improved the electrocatalytic properties over using an external reducing agent to form PtNP, which was explained based on the different rates of oxidation of Ti in the initial MXene support. Furthermore, good stability of the electrode modified by the MX-Pt was achieved without any polymeric binder and the HER reaction achieved only a negligible decrease over 3 000 potentiodynamic cycles.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21001 - Nano-materials (production and properties)

Projekt

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Journal of the Electrochemical Society

ISSN

0013-4651

e-ISSN

—

Svazek periodika

166

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

"H54"-"H62"

Kód UT WoS článku

000457103300001

EID výsledku v databázi Scopus

2-s2.0-85066494719