过电位
石墨烯
计时安培法
钴
循环伏安法
联氨(抗抑郁剂)
化学
量子点
锰
电催化剂
无机化学
电化学
材料科学
有机化学
纳米技术
物理化学
电极
色谱法
作者
Mbulelo Jokazi,Lekhetho S. Mpeta,Tebello Nyokong
标识
DOI:10.1002/elan.202200222
摘要
Abstract Manganese and cobalt metalated 5, 10, 15‐tris(aminophenyl)‐20‐(4‐carboxyphenyl) porphyrins (ClMnTA 3 CPP and CoTA 3 CPP) were synthesized and attached to graphene quantum dots (GQDs) via π‐π interaction and electrostatic interaction. The electrochemical oxidation of hydrazine was performed via cyclic voltammetry and chronoamperometry. The CoTA 3 CPP showed good electrocatalytic activity towards the oxidation of hydrazine in terms of catalytic rate constants and limits of detection (LoD). ClMnTA 3 CPP showed lower overpotential 0.60 V. The introduction of GQDs improved the electrocatalytic ability when combined with CoTA 3 CPP and ClMnTA 3 CPP with the lowest LoD (0.0025 mM CoTA 3 CPP–GQDs) followed by ClMnTA 3 CPP–GQDs with 0.0033 mM.
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