Open AccessQuasihexagonal Platinum Nanodendrites Decorated over CoS 2 ‐N‐Doped Reduced Graphene Oxide for Electro‐Oxidation of C1‐, C2‐, and C3‐Type Alcohols
Author(s) -
Logeshwaran Natarajan,
Panneerselvam Iyyappa Rajan,
Ramakrishnan Shanmugam,
Kumar Ramasamy Santhosh,
Kim Ae Rhan,
Wang Yan,
Yoo Dong Jin
Publication year - 2022
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202105344
Subject(s) - electrocatalyst , alcohol oxidation , ethylene glycol , graphene , materials science , chronoamperometry , cyclic voltammetry , oxide , chemical engineering , methanol , platinum , electrolyte , catalysis , direct ethanol fuel cell , alcohol fuel , adsorption , inorganic chemistry , electrochemistry , nanotechnology , chemistry , proton exchange membrane fuel cell , organic chemistry , electrode , metallurgy , engineering
The development of efficient and highly durable materials for renewable energy conversion devices is crucial to the future of clean energy demand. Herein, cage‐like quasihexagonal structured platinum nanodendrites decorated over the transition metal chalcogenide core (CoS 2 )‐N‐doped graphene oxide (PtNDs@CoS 2 ‐NrGO) through optimized shape engineering and structural control technology are fabricated. The prepared electrocatalyst of PtNDs@CoS 2 ‐NrGO is effectively used as anodic catalyst for alcohol oxidation in direct liquid alcohol fuel cells. Notably, the prepared PtNDs@CoS 2 ‐NrGO exhibits superior electrocatalytic performance toward alcohol oxidation with higher oxidation peak current densities of 491.31, 440.25, and 438.12 mA mg pt –1 for (methanol) C1, (ethylene glycol) C2, and (glycerol) C3 fuel electrolytes, respectively, as compared to state‐of‐the‐art Pt‐C in acidic medium. The electro‐oxidation durability of PtNDs@CoS 2 ‐NrGO is investigated through cyclic voltammetry and chronoamperometry tests, which demonstrate excellent stability of the electrocatalyst toward various alcohols. Furthermore, the surface and adsorption energies of PtNDs and CoS 2 are calculated using density functional theory along with the detailed bonding analysis. Overall, the obtained results emphasize the advances in effective precious material utilization and fabricating techniques of active electrocatalysts for direct alcohol oxidation fuel cell applications.