College of Chemistry and Chemical Engineering , Central South University , Changsha 410083 , People's Republic of China.
Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety , Changsha 410083 , People's Republic of China.
Inorg Chem. 2019 Dec 2;58(23):15841-15852. doi: 10.1021/acs.inorgchem.9b02230. Epub 2019 Nov 19.
Facile and high-performance electrode materials are crucial for the conversion and storage of clean energy. A gold-supported nanostructured NiFeCoPr hydroxide is synthesized by directly electrodepositing praseodymium-doped nickel-cobalt-iron hydroxide onto a gold-deposited nickel foam (NF) substrate. The resultant monolithic NiFeCoPrO-Au/NF electrode exhibits a high specific capacitance (1792 F g at a current density of 10 A g), excellent rate capability (1445 F g at a current density of 70 A g), and eminent capacitance retention (99.5% after 30 000 cycles) in 3 M KOH electrolyte. When used as an oxygen evolution electrocatalyst, NiFeCoPrO-Au/NF shows high catalytic activity for the oxygen evolution reaction with a small Tafel slope of 28 mV dec in 1 M KOH electrolyte and excellent stability over 10 h. These characteristics demonstrate the enormous potential of the NiFeCoPrO-Au/NF electrode for applications in electrocatalysis and supercapacitors.
用于清洁能转换和存储的简易高性能电极材料至关重要。通过直接将掺镨的镍-钴-铁氢氧化物电沉积在沉积金的泡沫镍（NF）基底上，合成了金负载的纳米结构 NiFeCoPr 氢氧化物。所得的整体式 NiFeCoPrO-Au/NF 电极在 3 M KOH 电解液中表现出高比电容（10 A g 下为 1792 F g）、优异的倍率性能（70 A g 下为 1445 F g）和杰出的电容保持率（30000 次循环后为 99.5%）。当用作析氧电催化剂时，NiFeCoPrO-Au/NF 在 1 M KOH 电解液中具有小的 Tafel 斜率 28 mV dec 的高析氧反应催化活性和超过 10 h 的优异稳定性。这些特性表明 NiFeCoPrO-Au/NF 电极在电催化和超级电容器中的应用具有巨大潜力。
