分层铁掺杂的CoP异质结构自组装在泡沫铜上作为一种用于高效全水分解的双功能电催化剂。
Hierarchical iron-doped CoP heterostructures self-assembled on copper foam as a bifunctional electrocatalyst for efficient overall water splitting.
作者信息
Huang Xiaokang, Gong Li, Xu Hui, Qin Jiaheng, Ma Ping, Yang Ming, Wang Kaizhi, Ma Lei, Mu Xiao, Li Rong
机构信息
State Key Laboratory of Applied Organic Chemistry (SKLAOC), The Key Laboratory of Catalytic Engineering of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, PR China.
College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730000, PR China.
出版信息
J Colloid Interface Sci. 2020 Jun 1;569:140-149. doi: 10.1016/j.jcis.2020.02.073. Epub 2020 Feb 17.
A bifunctional electrocatalyst with peculiarly hierarchical snowflake-like iron-doped CoP heterostructures self-assembled on copper foam (CoFeP/CF) was synthesized via a facile hydrothermal-phosphidation pathway. The excellent electrochemical performance of CoFeP/CF can be attributed to the synergistic effect of cobalt and iron atoms, tuneful interaction between metal atoms and phosphorus, and the large electrochemical active surface area origined from its peculiarly hierarchical snowflake-like heterostructures with high surface roughness. With the small Tafel slope values (of 73.0 mV dec for OER and 90.4 mV dec for HER), CoFeP/CF demands the diminutive overpotentials (of 277.9 mV for OER and 152.6 mV for HER) to desire the current density of 50 mA cm in alkaline electrolyte. Furthermore, CoFeP/CF exhibits outstanding electrochemical performance for the overall water splitting with the cell potential of 1.495 V to attain 10 mA cm in a two-electrode cell.
通过简便的水热-磷化途径合成了一种双功能电催化剂，其具有特殊的分级雪花状铁掺杂CoP异质结构，自组装在泡沫铜上（CoFeP/CF）。CoFeP/CF优异的电化学性能可归因于钴和铁原子的协同效应、金属原子与磷之间的可调相互作用，以及源自其具有高表面粗糙度的特殊分级雪花状异质结构的大电化学活性表面积。由于具有较小的塔菲尔斜率值（OER为73.0 mV dec，HER为90.4 mV dec），在碱性电解质中，CoFeP/CF需要极小的过电位（OER为277.9 mV，HER为152.6 mV）来达到50 mA cm的电流密度。此外，在两电极电池中，CoFeP/CF在1.495 V的电池电位下实现10 mA cm的全水解时，表现出出色的电化学性能。
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