In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Reversible H2 oxidation and evolution by hydrogenase embedded in a redox polymer film, published in 2021-03-31, which mentions a compound: 1762-34-1, mainly applied to reversible hydrogen oxidation hydrogenase redox polymer film, Reference of 5,5′-Dimethyl-2,2′-bipyridine.
Efficient electrocatalytic energy conversion requires devices to function reversibly, i.e., to deliver a substantial current at a minimal overpotential. Redox-active films can effectively embed and stabilize mol. 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, which consists 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 thermodn. limit. The same film also acted as a highly energy efficient cathode material for H2 evolution. We explained the catalytic properties using a kinetic model, which shows that reversibility can be achieved even though intermol. electron transfer is slower than catalysis. This understanding of reversibility simplifies the design principles of highly efficient and stable bioelectrocatalytic films, advancing their implementation in energy conversion.
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