Rational design and synthesis of low-cost noble-metal free electrode with high efficiency for hydrogen evolution reaction (HER) is crucial for the realization of eco-friendly hydrogen economy. Here, we report and design topologically nontrivial 1T’-MoTe₂ single crystals as remarkable hydrogen evolution electrocatalyst. The catalytic 1T’-MoTe₂ was controllably synthesized via solid-state reaction and then facilely exfoliated into nanosheets by isopropanol with the aid of sonication. The overpotentials at 10 mA cm⁻²( η ₁₀) can reach 73 mV with a low Tafel slope of 46.3 mV dec⁻¹, which are much lower than those reported by other preparation methods (η ₁₀ > 300 mV, Tafel slope > 50 mV dec⁻¹). The electrochemical impedance spectroscopy shows fast kinetics of 1T’-MoTe₂ single crystal with low contact resistance of 0.3 Ω. Additionally, 1T’-MoTe₂ single crystal also exhibits large electrochemical active surface area of 47.0 cm², high turnover frequency of 1.02 s⁻¹ at 0.4 V and excellent durability over 10 h in 0.5 M H₂SO₄( aq). This work reports 1T’-MoTe₂ single crystal as an excellent candidate for HER, which makes it possible to fabricate other robust Te-derived HER electrocatalysts.

合理设计和合成高效的氢气发生反应（HER）的低成本无贵金属无电极对于实现生态友好型氢气经济至关重要。在这里，我们报告并设计拓扑学上不重要的1T'-MoTe ₂单晶作为显着的析氢电催化剂。催化1T'-MoTe ₂通过固相反应可控制地合成，然后在超声作用下通过异丙醇轻松剥离成纳米片。在10mA厘米的超电势^-2（η ₁₀）可以达到73毫伏与46.3毫伏分解的低塔菲尔斜率^-1，这是多少比从其它的制备方法报道降低（η ₁₀> 300 mV，塔菲尔斜率> 50 mV dec ^-1）。电化学阻抗谱显示了1T'-MoTe ₂单晶的快速动力学，其低接触电阻为0.3Ω 。另外，1T'-MoTe ₂单晶还表现出47.0 cm ^2的大电化学活性表面积，0.4 V时的高周转频率1.02 s ^-1和在0.5 MH ₂ SO ₄（aq）中10 h的优异耐久性。这项工作报道了1T'-MoTe ₂单晶是HER的极好候选者，这使得制造其他坚固的Te衍生的HER电催化剂成为可能。