Noble metals are renowned for their catalytic activity, but the gearing cost and diminishing availability hindered the large-scale production of hydrogen. Herein, we report one-pot synthesized microstructured SrMoO₄ decorated on SrMoO₄@rGO-MWCNT micro-nanocomposite as a capable catalyst for hydrogen evolution reaction (HER) in an acidic environment. Different compositions (20 wt%, 40 wt%, 60 wt%, and 80 wt%) of the micro-nanostructures were engineering and evaluated electrochemically for HER catalysis. Among the compositions, 40 wt% SrMoO₄@rGO-MWCNT was found to be the best with and overpotential value of − 193 mV for attaining a current density of − 10 mA/cm². The intrinsic activity of the electrocatalyst was evaluated based on the turnover frequency and chronoamperometric measurement. The synergistic effect of the optimal composition resulted in superior performance and has outperformed all the other combinations. The study has opened a new gateway for exploring the coupling of oxide materials with carbon nanostructures.

Graphical Abstract

贵金属以其催化活性而著称，但传动装置的成本和可用性的下降阻碍了氢气的大规模生产。在这里，我们报告一锅合成的微结构SrMoO ₄修饰在SrMoO ₄ @ rGO-MWCNT微纳米复合材料上，作为在酸性环境中能进行氢释放反应（HER）的有效催化剂。对纳米纳米结构的不同组成（20 wt％，40 wt％，60 wt％和80 wt％）进行了工程设计，并对HER催化进行了电化学评估。在这些组合物中，发现40wt％SrMoO ₄ @ rGO-MWCNT最好，过电位值为− 193 mV，以实现− 10 mA / cm ²的电流密度。基于周转频率和计时电流法测量来评估电催化剂的固有活性。最佳组合物的协同作用产生了卓越的性能，并且胜过所有其他组合。该研究为探索氧化物材料与碳纳米结构的耦合开辟了新的途径。

图形概要