Fan, XiujunLiu, YuanyuePeng, ZhiweiZhang, ZhenhuaZhou, HaiqingZhang, XianmingYakobson, Boris I.Goddard, William A. IIIGuo, XiaHauge, Robert H.Tour, James M.2017-02-132017-02-132017Fan, Xiujun, Liu, Yuanyue, Peng, Zhiwei, et al.. "Atomic H-Induced Mo2C Hybrid as an Active and Stable Bifunctional Electrocatalyst." <i>ACS Nano,</i> 11, no. 1 (2017) American Chemical Society: 384-394. http://dx.doi.org/10.1021/acsnano.6b06089.https://hdl.handle.net/1911/93911Mo2C 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.engThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Chemical Society.Journal articleMo2Cgraphene nanoribbonhydrogen evolution reaction (HER)oxygen reduction reaction (ORR)atomic Hhttp://dx.doi.org/10.1021/acsnano.6b06089