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a b s t r a c tA novel synthetic approach has been designed to prepare CeO 2 /reduced graphene oxide (rGO) xerogel composite. The CeO 2 /rGO xerogel composite electrode displays much enhanced performance for the catalytic reduction of H 2 O 2 than the single component CeO 2 . The CeO 2 /rGO modified glassy carbon electrode displayed a wide linear range (60.7 nM-3.0 M), and low level of detection limit (30.40 nM) for H 2 O 2 and much higher sensitivity than that of CeO 2 nanoparticles modified electrode. The sensor fabricated by the xerogel composite was fast, stable, and reliable to the detection of hydrogen peroxide.

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The formation of telomeric G-quadruplexes has been shown to inhibit telomerase activity.

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