School of Chemistry and Materials Science, Jinan University, Guangzhou 510632, People's Republic of China.
Nanotechnology. 2017 Nov 17;28(46):465404. doi: 10.1088/1361-6528/aa8947. Epub 2017 Oct 23.
Many efforts have been devoted to the exploration of non-noble-metal electrocatalysts for the hydrogen evolution reaction (HER) in recent years. Here, we have developed a 3D-MoO microsphere supported MoSe for HER, via a facile hydrothermal approach followed by selenylation treatment. Loosely stacked MoSe layers are formed on the conductive MoO surface, and act as active sites for HER. Meanwhile, the metallic inner MoO facilitates electron transport for proton reduction. In addition, the MoSe could protect the inner MoO from the acidic electrolyte in the HER precess. Significantly, the as-synthesized MoO/MoSe exhibits excellent catalytic activity for HER, characterised by a low onset potential of -101 mV vs reversible hydrogen electrode, a small overpotential of 167 mV at a current density of 10 mA cm, along with Tafel slope values of 68 mV dec, as well as outstanding stability in 0.5 mol L HSO.
近年来，人们致力于探索非贵金属电催化剂在析氢反应（HER）中的应用。在此，我们通过简便的水热法和硒化处理，开发了一种用于 HER 的 3D-MoO 微球负载 MoSe。在导电 MoO 表面形成了松散堆积的 MoSe 层，作为 HER 的活性位点。同时，金属内的 MoO 有利于质子还原过程中的电子传输。此外，MoSe 可以保护内部的 MoO 免受 HER 过程中酸性电解质的侵蚀。重要的是，所合成的 MoO/MoSe 对 HER 表现出优异的催化活性，其特征在于相对于可逆氢电极的起始电位为-101 mV，在电流密度为 10 mA cm 时的过电位较小，为 167 mV，塔菲尔斜率值为 68 mV dec，并且在 0.5 mol L HSO 中具有出色的稳定性。
