摘要
利用廉价的过渡金属制备高效催化剂来降低复杂、缓慢阳极过电位,是解决电解水制备氢气瓶颈的有效手段。本研究采用溶剂热法在泡沫镍上合成具有多孔微球结构的Co_(3)O_(4)/NF高性能电催化剂,这种多孔微球材料展现出了较大的电化学活性面积(5.54 mF/cm^(2)),有利于暴露更多的活性位点,加速传质,显著提高催化剂的电化学活性。在1 mol/L KOH条件下具备较好的析氧反应(oxygen evolution reaction,OER)催化能力,仅需253mV便可达到50mA/cm^(2)的电流密度,并表现出良好的长时稳定性(24h)。简单的制备工艺、优异的性能、长期稳定的使用寿命使其在电解水催化发展领域具有巨大的潜力。
The cost-effective transition metals can be used to prepare efficient catalysts to reduce complex and sluggish anodic overpotential,which is an effective approach to overcome the bottleneck in hydrogen production via water electrolysis.In this study,a solvent-thermal method was employed to synthesize Co_(3)O_(4)/NF high-performance electrocatalyst with a porous microsphere structure on nickel foam substrate.The porous microsphere material exhibited a large electrochemical active surface area(5.54 mF/cm^(2)),facilitating the exposure of more active sites,promoting mass transport,and significantly enhancing the electrochemical activity of the catalyst.Under 1 mol/L KOH condition,the catalyst demonstrated excellent oxygen evolution reaction(OER)catalytic ability,achieving a current density of 50 mA/cm^(2) with a low overpotential of only 253 mV,along with remarkable long-term stability(24 h).Its simple preparation process,outstanding performance,and prolonged operational lifespan show its tremendous potential in the field of electrolytic water catalysis development.
作者
蔡家阳
曲德智
何雄
刘静华
苏萍萍
CAI Jiayang;QU Dezhi;HE Xiong;LIU Jinghua;SU Pingping(School of Biological and Chemical Engineering,Guangxi University of Science and Technology,Liuzhou 545006,China;School of Electronic Engineering,Guangxi University of Science and Technology,Liuzhou 545006,China)
出处
《广西科技大学学报》
CAS
2024年第3期122-131,共10页
Journal of Guangxi University of Science and Technology
基金
国家自然科学基金青年科学基金项目(2209028)
广西科技基地和人才专项(桂科AD21075032)
广西高校中青年教师科研基础能力提升项目(2021KY0359)
广西研究生教育创新计划项目(GKYC202236)资助。
关键词
Co_(3)O_(4)
OER
电催化剂
多孔微球结构
电化学性能
Co_(3)O_(4)
oxygen evolution reaction(OER)
electrocatalyst
porous microsphere structure
electrochemical performance
