Hydrolysis of borohydrides is a promising method for the hydrogen supply of high-energy-density fuel cells.Realization of on-demand hydrogen generation is critical and challenging for efficient utilization of hydrogen...Hydrolysis of borohydrides is a promising method for the hydrogen supply of high-energy-density fuel cells.Realization of on-demand hydrogen generation is critical and challenging for efficient utilization of hydrogen.Herein,we proposed a novel strategy to realize the real-time dynamic tunability of the hydrogen generation rate of the reaction for the first time.To realize this strategy,an applicable 3D catalyst is developed by depositing catalytic materials on readily available polymer foams through a simple electroless plating method,showing remarkable catalytic activity(12560 mL min^(-1)_(gcatalyst)^(-1),10470 mL min^(-1)_(goverall structure)^(-1))and durability toward the hydrolysis of NaBH_(4).Due to its multiple advantages,valuable regulation of the H_(2)production rate was realized by simply adjusting the contact area of the magnetic catalyst with the NaBH_(4)solution using an external magnet.Moreover,the real-time tunability of the output power of the NaBH_(4)-based fuel cell system without additional balance-of-plants was realized.This strategy may contribute to the improvement of the hydrolysis of borohydrides toward practical H_(2)generator applications,and could be extended to other liquid-phase hydrogen production systems.展开更多
基金supported by the National Natural Science Foundation of China(No.52172189 and 21875042)the Science and Technology Commission of Shanghai Municipality(21DZ1207102 and 21DZ1207103).
文摘Hydrolysis of borohydrides is a promising method for the hydrogen supply of high-energy-density fuel cells.Realization of on-demand hydrogen generation is critical and challenging for efficient utilization of hydrogen.Herein,we proposed a novel strategy to realize the real-time dynamic tunability of the hydrogen generation rate of the reaction for the first time.To realize this strategy,an applicable 3D catalyst is developed by depositing catalytic materials on readily available polymer foams through a simple electroless plating method,showing remarkable catalytic activity(12560 mL min^(-1)_(gcatalyst)^(-1),10470 mL min^(-1)_(goverall structure)^(-1))and durability toward the hydrolysis of NaBH_(4).Due to its multiple advantages,valuable regulation of the H_(2)production rate was realized by simply adjusting the contact area of the magnetic catalyst with the NaBH_(4)solution using an external magnet.Moreover,the real-time tunability of the output power of the NaBH_(4)-based fuel cell system without additional balance-of-plants was realized.This strategy may contribute to the improvement of the hydrolysis of borohydrides toward practical H_(2)generator applications,and could be extended to other liquid-phase hydrogen production systems.
