【摘要】 本文中主要研究了原始溶液中Ni、Co质量比(w_N∶iw_Co)对Ni-Co-S-O复合材料催化剂结构及性能的影响。采用水热法在泡沫镍（NF）基底上制备出了三维分层花瓣状纳米结构的Ni-Co-S-O复合材料催化剂。当原始溶液中w_N∶iw_Co=1∶2时,所制备的Ni-Co-S-O/NF（1∶2）催化剂具有更大的电化学活性面积（ECSA）,在碱性水电解析氧过程中具有最好的电催化性能。在1 mol·L^-1KOH碱性溶液中,Ni-Co-S-O/NF（1∶2）仅需61和313 mV的过电位,可分别获得10和100 mA·cm^-2的电流密度,并且其Tafel斜率为155 mV·dec^-1。Ni-Co-S-O/NF（1∶2）催化剂在碱性条件下100 mA·cm^-2的恒定高电流密度下运行24 h后仍能保持片状结构,表现出良好的稳定性。更多还原

【Abstract】 In this paper,the effect of mass ratio of Ni and Co(w_Ni:w_Co) in initial solution on the structure and properties of Ni-Co-S-O composite catalysts was studied.A three-dimensional petal-like and hierarchically connected nano-structured Ni-Co-S-O composite catalyst was obtained on a nickel foam（NF） substrate by a hydrothermal method.When w_Ni:w_Co=1:2,the prepared Ni-Co-S-O/NF（1:2） catalyst has a larger electrochemically active area（ECSA） and the best oxygen evolution reaction（OER） catalytic performance in alkaline water electrolysis.In 1 mol·L^-1 KOH alkaline solution,Ni-Co-S-O/NF（1:2） only need 61 and 313 mV to achieve the current density of 10 and 100 mA·cm^-2 respectively.At the same time,its Tafel slope was 155 mV·dec^-1.After tested at a high current density of 100 mA·cm^-2 for 24 h in the alkaline solution,the Ni-Co-S-O/NF（1:2） could still maintain sheet structure and displayed a good durability.更多还原