Cathodic biocatalyst consisting of laccase and gold nanoparticle for improving oxygen reduction reaction rate and enzymatic biofuel cell performance

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) Vol. 62; pp. 329 - 332
• Main Authors: Kang, Suhyeon, Yoo, Kye Sang, Chung, Yongjin, Kwon, Yongchai
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.06.2018; 한국공업화학회
• Subjects: Electron collection effect; Enzymatic biofuel cell; Gold nano particle-naphthalenethiol composite; Laccase; Oxygen reduction reaction; 화학공학; Enzymatic biofuel cell; Gold nano particle-naphthalenethiol composite; Electron collection effect; Oxygen reduction reaction; Laccase
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2018.01.011

[Display omitted] •CNT/PEI/[GNP-NPT]/LAC catalyst is suggested as cathodic catalyst for EBC.•Onset potential and ORR are improved by the adoption of PEI and GNP-NPT.•PEI induces more immobilization of laccase molecules.•GNP-NPT acts as electron relay between T1 of laccase and supporter.•EBC using CNT/PEI/[GNP-NPT]/LAC shows the best performance. New catalyst for promoting oxygen reduction reaction (ORR) and enzymatic biofuel cell (EBC) performance is suggested. The catalyst consist of laccase (LAC) and gold nanoparticle (GNP)-naphthalenethiol (NPT), which are linked to polyethyleneimine (PEI) and carbon nanotube (CNT) (CNT/PEI/[GNP-NPT]/LAC). Its onset potential and ORR rate are improved due to adoptions of PEI and GNP-NPT. Namely, CNT/PEI induces more immobilization of LACs and GNP-NPT acts as electron relay between CNP and NPT by thiol-gold bond and between CNT/PEI and LACs by electron collection effect. Even in EBC measurement, maximum power density of EBC using CNT/PEI/[GNP-NPT]/LAC is highest as 13μWcm−2.