Reversible H₂ Oxidation and Evolution by Hydrogenase Embedded in a Redox Polymer Film.

ABSTRACT: Efficient electrocatalytic energy conversion requires the devices to function reversibly, i.e. deliver a significant current at minimal overpotential. Redox-active films can effectively embed and stabilise molecular electrocatalysts, but mediated electron transfer through the film typically makes the catalytic response irreversible. Here, we describe a redox-active film for bidirectional (oxidation or reduction) and reversible hydrogen conversion, consisting of [FeFe] hydrogenase embedded in a low-potential, 2,2'-viologen modified hydrogel. When this catalytic film served as the anode material in a H₂/O₂ biofuel cell, an open circuit voltage of 1.16 V was obtained - a benchmark value near the thermodynamic limit. The same film also acted as a highly energy effi

SUBMITTER: Hardt S 

PROVIDER: S-EPMC7610533 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature