Hits:

Indexed by:期刊论文

Date of Publication:2019-08-01

Journal:Journal of Energy Chemistry

Included Journals:EI

Volume:35

Page Number:49-54

ISSN No.:20954956

Key Words:Anodes; Carbon nanotubes; Catalytic oxidation; Durability; Electrocatalysis; Energy conversion; Glassy carbon; Nanocatalysts; Oxidation; Yarn, Catalytic intermediates; Functionalized multi-walled carbon nanotubes; Glassy carbon electrodes; Long term durability; Neutral mononuclear; Ruthenium catalysts; Water oxidation; Water splitting, Multiwalled carbon nanotubes (MWCN)

Abstract:Development of efficient molecular devices for overall water splitting has always been a hotspot of research to realize clean and sustainable energy conversion. In the case, long-term durability of molecular devices is a crucial factor to determine their practical application. Here, an efficient composite molecular anode was assembled by immobilization of charge-neutral mononuclear Ru1 complex on COOH-functionalized multiwalled carbon nanotubes (MWCNTsCOOH) sticking on a glassy carbon (GC) electrode (Ru1/MWCNTsCOOH/GC). The prepared hybrid anode showed a low onset overpotential of only 380 mV for electrocatalytic water oxidation. Moreover, the anode displayed a steady catalytic current density of 1.25 mA/cm2 for more than 5 h at the overpotential of 580 mV, a high TON of 186000 (5 h), a TOF of 10.3 s?1 and a faradic efficiency of 96%, indicating the significant efficiency and extremely durability. The excellent durability of the molecular anode should be attributed to the key charge-neutral catalytic intermediates (Ru1a  d) of the catalytic step and the two long flexible carbon chains of the catalyst. ? 2018 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences