Bipolar Electrochemistry as a Simple Synthetic Route toward Nanoscale Transition of Mo2B5 and W2B5 for Enhanced Hydrogen Evolution Reaction

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F19%3A43918027" target="_blank" >RIV/60461373:22310/19:43918027 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/19:PU133213

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/acssuschemeng.9b01251" target="_blank" >https://pubs.acs.org/doi/10.1021/acssuschemeng.9b01251</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acssuschemeng.9b01251" target="_blank" >10.1021/acssuschemeng.9b01251</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Bipolar Electrochemistry as a Simple Synthetic Route toward Nanoscale Transition of Mo2B5 and W2B5 for Enhanced Hydrogen Evolution Reaction

Popis výsledku v původním jazyce

The development of non-noble metal and earth-abundant-based electrocatalysts for electrochemical hydrogen production is of great significance for large scale application of water splitting technology. Particularly, molybdenum- and tungsten-based materials, such as MoS2, WS2, MoP, and WP, are widely studied for their promising performance in catalyzing the hydrogen evolution reaction (HER), especially in their nanostructured forms. Here, we investigate the HER activity of nanostructured molybdenum and tungsten borides, which are highly understudied, and report the use of bipolar electrochemistry (BP) to enhance their performances. BP treatment induces the size reduction of commercial Mo2B5 and W2B5 from the micrometer range down to the nanometer range. The smaller Mo2B5 and W2B5 particles have greater exposure of active sites for HER catalysis and result in better HER performance. To illustrate, we found that the electrocatalytic performance of BP-treated W2B5 is close to the best HER electrocatalyst, Pt/C. Electrochemical impedance spectroscopy measurements reveal lower charge transfer resistance (R-ct) of the materials after bipolar electrochemical treatment, thereby suggesting another effect of the BP method in enhancing HER catalysis. Overall, we demonstrate bipolar electrochemistry as a simple method to improve the catalytic activity of Mo2B5 and W2B5.

Název v anglickém jazyce

Bipolar Electrochemistry as a Simple Synthetic Route toward Nanoscale Transition of Mo2B5 and W2B5 for Enhanced Hydrogen Evolution Reaction

Popis výsledku anglicky

The development of non-noble metal and earth-abundant-based electrocatalysts for electrochemical hydrogen production is of great significance for large scale application of water splitting technology. Particularly, molybdenum- and tungsten-based materials, such as MoS2, WS2, MoP, and WP, are widely studied for their promising performance in catalyzing the hydrogen evolution reaction (HER), especially in their nanostructured forms. Here, we investigate the HER activity of nanostructured molybdenum and tungsten borides, which are highly understudied, and report the use of bipolar electrochemistry (BP) to enhance their performances. BP treatment induces the size reduction of commercial Mo2B5 and W2B5 from the micrometer range down to the nanometer range. The smaller Mo2B5 and W2B5 particles have greater exposure of active sites for HER catalysis and result in better HER performance. To illustrate, we found that the electrocatalytic performance of BP-treated W2B5 is close to the best HER electrocatalyst, Pt/C. Electrochemical impedance spectroscopy measurements reveal lower charge transfer resistance (R-ct) of the materials after bipolar electrochemical treatment, thereby suggesting another effect of the BP method in enhancing HER catalysis. Overall, we demonstrate bipolar electrochemistry as a simple method to improve the catalytic activity of Mo2B5 and W2B5.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

<a href="/cs/project/GX19-26896X" target="_blank" >GX19-26896X: Elektrochemie 2D Nanomateriálů</a><br>

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

ACS Sustainable Chemistry &amp; Engineering

ISSN

2168-0485

e-ISSN

—

Svazek periodika

7

Číslo periodika v rámci svazku

14

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

12148-12159

Kód UT WoS článku

000475838100025

EID výsledku v databázi Scopus

2-s2.0-85073659076