用于高效析氢的多孔钼基杂化催化剂。
Porous Molybdenum-Based Hybrid Catalysts for Highly Efficient Hydrogen Evolution.
机构信息
School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023 (P.R. China).
Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Suzhou, Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei 230026 (P.R. China).
出版信息
Angew Chem Int Ed Engl. 2015 Oct 26;54(44):12928-32. doi: 10.1002/anie.201505691. Epub 2015 Oct 5.
We have synthesized a porous Mo-based composite obtained from a polyoxometalate-based metal-organic framework and graphene oxide (POMOFs/GO) using a simple one-pot method. The MoO2 @PC-RGO hybrid material derived from the POMOFs/GO composite is prepared at a relatively low carbonization temperature, which presents a superior activity for the hydrogen-evolution reaction (HER) in acidic media owing to the synergistic effects among highly dispersive MoO2 particles, phosphorus-doped porous carbon, and RGO substrates. MoO2 @PC-RGO exhibits a very positive onset potential close to that of 20 % Pt/C, low Tafel slope of 41 mV dec(-1) , high exchange current density of 4.8×10(-4) A cm(-2) , and remarkable long-term cycle stability. It is one of the best high-performance catalysts among the reported nonprecious metal catalysts for HER to date.
我们采用简单的一锅法合成了一种由多酸基金属-有机骨架和氧化石墨烯（POMOFs/GO）得到的多孔 Mo 基复合材料。由 POMOFs/GO 复合材料衍生而来的 MoO2@PC-RGO 杂化材料在相对较低的碳化温度下制备，由于高度分散的 MoO2 颗粒、磷掺杂多孔碳和 RGO 基底之间的协同作用，在酸性介质中对析氢反应（HER）表现出优异的活性。MoO2@PC-RGO 具有非常正的起始电位，接近于 20%Pt/C，低的塔菲尔斜率为 41mV·dec-1，高的交换电流密度为 4.8×10-4A·cm-2，以及显著的长期循环稳定性。它是迄今为止报道的用于 HER 的非贵金属催化剂中性能最好的催化剂之一。
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