原始溶液中Ni、Co质量比对Ni-Co-S-O/NF催化剂在碱性水电解中析氧性能的影响  

Effect of Mass Ratio of Ni and Co in Initial Solution on Oxygen Evolution Reaction Performance of Ni-Co-S-O/NF Catalyst in Alkaline Water Electrolysis

作　　者：杜芳 刘帅 古京九 王桁 李冰[1,2] DU Fang;LIU Shuai;GU Jing-Jiu;WANG Heng;LI Bing(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China;Collaborative Innovation Center of Clean Energy,Longyan University,Longyan,Fujian 364012,China)

机构地区：[1]华东理工大学机械与动力工程学院,上海200237 [2]龙岩学院清洁能源协同创新中心,龙岩364012

出　　处：《无机化学学报》2021年第5期929-936,共8页Chinese Journal of Inorganic Chemistry

摘　　要：本文中主要研究了原始溶液中Ni、Co质量比(w_(Ni)∶w_(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_(Ni)∶w_(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^(-1)KOH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。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.

关 键 词：Ni-Co-S-O/NF催化剂 碱性水电解 析氧反应 过渡金属 

分 类 号：O614.812[理学—无机化学] O614.813[理学—化学]