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 i...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 COOHfunctionalized multiwalled carbon nanotubes(MWCNTs COOH) 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 of1.25 mA/cm^2 for more than 5 h at the overpotential of 580 m V, a high TON of 186000(5 h), a TOF of10.3 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(Ru1 ad) of the catalytic step and the two long flexible carbon chains of the catalyst.展开更多
Developing highly efficient and stable water oxidation catalysts based on abundant metallic elements is a challenge that must be met to fulfill the promise of water splitting for clean energy production.In this work,w...Developing highly efficient and stable water oxidation catalysts based on abundant metallic elements is a challenge that must be met to fulfill the promise of water splitting for clean energy production.In this work,we developed an oxygen evolution reaction catalyst consisting of a nanostructured film electrodeposited from a phosphate buffer solution(0.2mol/L,pH=12.0)containing Cu‐tricine complex.A Tafel plot showed that the required overpotential for a current densityof1.0mA/cm2was only395mV and the Tafel slope was46.7mV/decade.In addition,the Cu‐tricine film maintained a stable current density of7.5mA/cm2for the oxygen evolution reaction in phosphate buffer solution for10h,and a Faradaic efficiency of99%was obtained.展开更多
基金supported by the National Natural Science Foundation of China(21573033,21875030)the National Basic Research Program of China(973 program,2014CB239402)+1 种基金the Fundamental Research Funds for the Central Universities(DUT18ZD210)the State Key Laboratory of Fine Chemicals(KF1610)
文摘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 COOHfunctionalized multiwalled carbon nanotubes(MWCNTs COOH) 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 of1.25 mA/cm^2 for more than 5 h at the overpotential of 580 m V, a high TON of 186000(5 h), a TOF of10.3 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(Ru1 ad) of the catalytic step and the two long flexible carbon chains of the catalyst.
文摘Developing highly efficient and stable water oxidation catalysts based on abundant metallic elements is a challenge that must be met to fulfill the promise of water splitting for clean energy production.In this work,we developed an oxygen evolution reaction catalyst consisting of a nanostructured film electrodeposited from a phosphate buffer solution(0.2mol/L,pH=12.0)containing Cu‐tricine complex.A Tafel plot showed that the required overpotential for a current densityof1.0mA/cm2was only395mV and the Tafel slope was46.7mV/decade.In addition,the Cu‐tricine film maintained a stable current density of7.5mA/cm2for the oxygen evolution reaction in phosphate buffer solution for10h,and a Faradaic efficiency of99%was obtained.
