Yakobson, Boris I.
Goddard, William A. III
Hauge, Robert H.
Tour, James M.
Fan, Xiujun, Liu, Yuanyue, Peng, Zhiwei, et al.. "Atomic H-Induced Mo2C Hybrid as an Active and Stable Bifunctional Electrocatalyst." ACS Nano, 11, no. 1 (2017) American Chemical Society: 384-394. http://dx.doi.org/10.1021/acsnano.6b06089.
Mo2C nanocrystals (NCs) anchored on vertically aligned graphene nanoribbons (VA-GNR) as hybrid nanoelectrocatalysts (Mo2C–GNR) are synthesized through the direct carbonization of metallic Mo with atomic H treatment. The growth mechanism of Mo2C NCs with atomic H treatment is discussed. The Mo2C–GNR hybrid exhibits highly active and durable electrocatalytic performance for the hydrogen-evolution reaction (HER) and oxygen-reduction reaction (ORR). For HER, in an acidic solution the Mo2C–GNR has an onset potential of 39 mV and a Tafel slope of 65 mV dec–1, and in a basic solution Mo2C–GNR has an onset potential of 53 mV, and Tafel slope of 54 mV dec–1. It is stable in both acidic and basic media. Mo2C–GNR is a high-activity ORR catalyst with a high peak current density of 2.01 mA cm–2, an onset potential of 0.93 V that is more positive vs reversible hydrogen electrode (RHE), a high electron transfer number n (∼3.90), and long-term stability.
American Chemical Society
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Atomic H-Induced Mo2C Hybrid as an Active and Stable Bifunctional Electrocatalyst
hydrogen evolution reaction (HER)
oxygen reduction reaction (ORR)