Electrochemical nitrate reduction to ammonia using laser-processed Nb2AlC: the role of effective Al etching

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F25%3A73631168" target="_blank" >RIV/61989592:15640/25:73631168 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/62156489:43210/25:43927177 RIV/61989100:27240/25:10257961 RIV/61989100:27740/25:10257961

Výsledek na webu

<a href="https://pubs.rsc.org/en/content/articlelanding/2025/ta/d5ta02418h" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2025/ta/d5ta02418h</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/D5TA02418H" target="_blank" >10.1039/D5TA02418H</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electrochemical nitrate reduction to ammonia using laser-processed Nb2AlC: the role of effective Al etching

Popis výsledku v původním jazyce

Electrocatalytic nitrate reduction reaction to ammonia (NH3) is a promising approach for generating NH3 compared with the widely used Haber-Bosch process. It offers the advantage of zero carbon emission and helps in recycling nitrate waste. However, the challenge remains in the synthesis and engineering of proficient electrocatalytic materials with high faradaic efficiency and yield rate. Herein, we report a unique laser-processed niobium oxide-graphene (NbOx-Gr) electrode attached to a conductive support of graphene for NH3 generation. The two-step fabrication process started with spatially and temporally controlled pulsed laser writing on an Nb2AlC-coated polymer surface followed by simple electrochemical etching to remove excess Al. Electrochemical analysis elucidated that the NbOx-Gr electrode exhibited improved activity for ammonia generation. Moreover, theoretical studies provide insights into the nitrate reduction reaction mechanism, confirming that the electrochemical active site was located on the Nb atom of the NbOx-Gr electrode. Laser processing is a cost-effective, less chemically hazardous, versatile, and efficient approach to utilize MAX phases for multiple energy storage and conversion applications.

Název v anglickém jazyce

Electrochemical nitrate reduction to ammonia using laser-processed Nb2AlC: the role of effective Al etching

Popis výsledku anglicky

Electrocatalytic nitrate reduction reaction to ammonia (NH3) is a promising approach for generating NH3 compared with the widely used Haber-Bosch process. It offers the advantage of zero carbon emission and helps in recycling nitrate waste. However, the challenge remains in the synthesis and engineering of proficient electrocatalytic materials with high faradaic efficiency and yield rate. Herein, we report a unique laser-processed niobium oxide-graphene (NbOx-Gr) electrode attached to a conductive support of graphene for NH3 generation. The two-step fabrication process started with spatially and temporally controlled pulsed laser writing on an Nb2AlC-coated polymer surface followed by simple electrochemical etching to remove excess Al. Electrochemical analysis elucidated that the NbOx-Gr electrode exhibited improved activity for ammonia generation. Moreover, theoretical studies provide insights into the nitrate reduction reaction mechanism, confirming that the electrochemical active site was located on the Nb atom of the NbOx-Gr electrode. Laser processing is a cost-effective, less chemically hazardous, versatile, and efficient approach to utilize MAX phases for multiple energy storage and conversion applications.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

<a href="/cs/project/EH22_008%2F0004587" target="_blank" >EH22_008/0004587: Technologie za hranicí nanosvěta</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Materials Chemistry A

ISSN

2050-7488

e-ISSN

2050-7496

Svazek periodika

13

Číslo periodika v rámci svazku

26

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

21063-21076

Kód UT WoS článku

001503957100001

EID výsledku v databázi Scopus

2-s2.0-105007951029