The establishment of an economic means of hydrogen production by electrochemical water‐splitting can help alleviate the intermittency problem associated with renewable energy sources such as solar and wind, and also provide for the extensive commercialization of fuel cell technologies. To enable this, cheap, active, and stable hydrogen evolution catalysts that can replace precious metal catalysts such as Pt must be developed. Herein, a scalable synthesis of porous Mo₂C nanostructures derived from biochar, an inexpensive plant byproduct, is reported. The Mo₂C catalyst materials prepared using this solid‐state method, loaded on planar substrates, require overpotentials of only 35 and 60 mV to drive current densities of −10 and −100 mA cm⁻² in 0.50 m H₂SO₄ solution and exhibit stable operation for >100 h at operating current densities of −10 and −100 mA cm⁻².

中文翻译：

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高效，生物炭衍生的碳化钼氢析出电催化剂

建立通过电化学水分解生产氢气的经济手段，可以缓解与可再生能源（例如太阳能和风能）相关的间歇性问题，还可以为燃料电池技术的广泛商业化提供条件。为此，必须开发廉价，活性和稳定的析氢催化剂，以替代贵金属催化剂（例如Pt）。在本文中，报道了源自生物炭的廉价Mo ₂ C纳米结构的可扩展合成，生物炭是廉价的植物副产物。使用这种固态方法制备的Mo ₂ C催化剂材料，装载在平面基板上，仅需要35和60 mV的过电势即可在0.50的驱动力下驱动-10和-100 mA cm ^-2的电流密度。m H ₂ SO ₄溶液，在-10和-100 mA cm ^-2的工作电流密度下，稳定运行> 100 h 。