Open AccessFabrication of Non-precious Vanadium Tungsten Nanocomposite for Enhanced Electrocatalytic Oxygen Reduction Reaction
Author(s) -
L. Stanlykeninxavier,
P. Elangovan,
M.S.S. Saravanakumaar
Publication year - 2021
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2021.23097
Subject(s) - catalysis , vanadium , nanocomposite , chemistry , chemical engineering , electrochemistry , nanotechnology , nanocrystal , metal , materials science , inorganic chemistry , electrode , organic chemistry , engineering
For the commercialization of alkaline fuel cells and metal air batteries, the advances in non-precious,cheap, stable electrocatalysts for the oxygen reduction reaction (ORR) and highly active remain amajor problem. To overcome this problem, a facile approach was established to fabricate non-preciousmetal electrocatalysts, such as nanoparticles, pristine V2O5 and their WO3 hybrids. This is the firststudy reporting the utilization of monoclinic-WO3-nanocrystal-coupled V2O5 that serves as ORRcatalysts. Compared with 50 wt.% WO3 with 50 wt.% V2O5 (VW-2) spheres and pristine V2O5, thehybrid catalyst of 25 wt.% WO3 and 75 wt.% V2O5 (VW-1) spheres exhibits outstanding catalyticactivity towards ORR. In addition, the hybrid of 25 wt.% WO3 and 75 wt.% V2O5 (VW-1) exhibits ahigher long-term durability and catalytic activity than high-quality commercial Pt/C catalysts, whichrenders the composites of WO3/V2O5 composites hybrid a high-capacity candidate for non-precious,high-performance, metal-based electrocatalysts having high efficiency and low cost for electrochemicalenergy conversion. The enhanced activity of WO3/V2O5 composites is mainly obtained from theimproved structural openness in the V2O5 tunnel structure when coupled with WO3.