Abstract Proton transport plays an important role in electrochemical reactions and biological processes. In this study, bioinspired proton conducting channels are designed for high-efficiency proton exchange membranes (PEMs) by immobilizing adenosine triphosphate (ATP) on graphene oxide (GO) nanosheets to form ordered ATP@GO laminates in Nafion through electrostatic layer-by-layer deposition of their blended solution. The composite membrane (Nafion/ATP@GO) demonstrates low methanol permeability of 2.04 × 10−7 cm2 s−1, and high proton conductivity (reaches 0.345 S cm−1 at 80 °C/100% relative humidity (RH) and 0.221 S cm−1 at 140 °C/50% RH) because of the orderly lamellar structure and ATP molecular structure, thereby enhancing the performance of direct methanol fuel cell with power density of 406.35 mW cm−2 at 80 °C and 100% RH. The proposed ATP channel strategy serves as reference in developing next-generation high-performance PEMs for fuel cells.

中文翻译：

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三磷酸腺苷@氧化石墨烯质子通道用于通过静电逐层沉积构建的质子交换膜

摘要 质子传输在电化学反应和生物过程中起着重要作用。在这项研究中，通过将三磷酸腺苷 (ATP) 固定在氧化石墨烯 (GO) 纳米片上，通过静电逐层在 Nafion 中形成有序的 ATP@GO 层压板，为高效质子交换膜 (PEM) 设计仿生质子传导通道其混合溶液的沉积。复合膜 (Nafion/ATP@GO) 表现出 2.04 × 10−7 cm2 s−1 的低甲醇渗透率和高质子电导率（在 80 °C/100% 相对湿度 (RH) 和 0.221 S cm−1 at 140 °C/50% RH) 由于有序的层状结构和 ATP 分子结构，从而提高了直接甲醇燃料电池在 80 °C 和 100% RH 下功率密度为 406.35 mW cm−2 的性能.