摘要
以废旧紫铜片为基体,Ni粉、Cr粉为覆膜材料,通过活化反应烧结法制备了Ni-Cr-Cu三元合金电极材料。采用X射线衍射分析(XRD)、场发射电镜(SEM)、能谱(EDS)等对电极的物相、形貌结构、元素分布以及析氢产物进行表征;通过循环伏安、线性极化、交流阻抗等方法测试了合金电极材料的电催化析氢性能。结果表明,Ni-Cr-Cu三元合金薄膜电极具有优异的析氢性能,调节Cr元素的含量可提高其析氢催化活性,在室温条件下,Ni30%Cr-Cu三元合金电极材料在6 mol/L KOH的溶液中析氢性能较好,其析氢过电位仅有-0.13 V(vs RHE),交换电流密度为10 mA/cm2时对应的极化电位为-0.145 V(vs RHE);经开路电位测试36000 s后,电极材料的开路电位(η)从0.05 V变化为0.02 V,仅降低0.03 V,表明析氢电极化学稳定性良好。
Ni-Cr-Cu ternary alloys electrode materials were prepared by activation reaction sintering method with tinplate,Ni powder and Cr powder as raw materials.The phase,constitute morphology and element component of the electrode were characterized by XRD,SEM,EDS.The electrocatalytic hydrogen evolution performance of alloy electrode materials was investigated by cyclic voltammetry curve,linear polarization curve,potentiodynamic polarization curve,electrochemical impedance spectrum.The results show that the Ni-Cr-Cu ternary alloy film electrode has excellent hydrogen evolution performance,and the content of Cr can improve the hydrogen evolution catalytic activity.At room temperature,the catalytic activity of hydrogen evolution of Ni30 wt%Cr-Cu ternary alloy electrode material in 6 mol/L KOH solution is the strongest,the hydrogen evolution overpotential is only-0.13 V(vs RHE),the potential is-0.145 V(vs RHE)as the exchange current density of 10 mA/cm2,and the open circuit potential(η)of the electrode material is from 0.05 V to 0.02 V after 36000 s,which only increases by 0.03 V,indicating that the hydrogen evolution electrode has good chemical stability.
作者
李喜德
曹德华
冯新东
张绰
邹浩然
李彬
李菊英
熊烈强
郑晓
杨军胜
Li Xide;Cao Dehua;Feng Xingdong;Zhang Chuo;Zou Haoran;Li Bin;Li Juying;Xiong Lieqiang;Zheng Xiao;Yang Junsheng(Wuhan Polytechnic University,Wuhan 430023,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2021年第8期2905-2912,共8页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51704221)
武汉轻工大学杰出青年基金(2018J05)。
关键词
Ni-Cr-Cu
制备
析氢
析氢机理
电化学
Ni-Cr-Cu
preparation
hydrogen evolution
hydrogen evolution mechanism
electrochemistry
