In the face of environmental pollution and an energy shortage,how to reduce the cost of a noble metal catalyst in clean energy such as the fuel cell system and improve its electrocatalytic performance is one of the ho...In the face of environmental pollution and an energy shortage,how to reduce the cost of a noble metal catalyst in clean energy such as the fuel cell system and improve its electrocatalytic performance is one of the hot issues in thisfield.Here,a facile stepwise co-reduction route for synthesizing a series of PdFe/Cu catalysts with surface reconstruction is investigated and the ethanol oxidation reaction(EOR)performance is explored.The greater exposure of Pd active sites makes it excellent in EOR in alkaline media compared to the homemade and commercial Pd black catalyst.The mass activity of PdFe/Cu(794.97 mA mg^(-1)Pd)is 2.52 times that of the Pd black catalyst(315.64 mA mg^(-1)Pd).This kind of PdFe/Cu catalyst shows enhanced mass current density(255.66 mA mg^(-1)Pd)after the 1800 s chronoamperometry test and only exhibits a decay of 1.4%after accelerated 500-cycle measurement.The enhanced EOR performance may be due to the change in the electronic structure of Pd caused by synergistic and strain effects among Pd,Fe,and Cu.This work provides an effective and kindly strategy to synthesize electrocatalysts with superior activity and durability in relation to EOR.展开更多
基金Thefinancial support from the National Natural Science Foundation of China(21503120,21403126)the Hubei Provincial Natural Science Foundation of China(2018CFB659)the 111 Project(D20015)is highly acknowledged.
文摘In the face of environmental pollution and an energy shortage,how to reduce the cost of a noble metal catalyst in clean energy such as the fuel cell system and improve its electrocatalytic performance is one of the hot issues in thisfield.Here,a facile stepwise co-reduction route for synthesizing a series of PdFe/Cu catalysts with surface reconstruction is investigated and the ethanol oxidation reaction(EOR)performance is explored.The greater exposure of Pd active sites makes it excellent in EOR in alkaline media compared to the homemade and commercial Pd black catalyst.The mass activity of PdFe/Cu(794.97 mA mg^(-1)Pd)is 2.52 times that of the Pd black catalyst(315.64 mA mg^(-1)Pd).This kind of PdFe/Cu catalyst shows enhanced mass current density(255.66 mA mg^(-1)Pd)after the 1800 s chronoamperometry test and only exhibits a decay of 1.4%after accelerated 500-cycle measurement.The enhanced EOR performance may be due to the change in the electronic structure of Pd caused by synergistic and strain effects among Pd,Fe,and Cu.This work provides an effective and kindly strategy to synthesize electrocatalysts with superior activity and durability in relation to EOR.
