Pt/Co3O4 Surpasses Benchmark Pt/C: An Approach Toward Next Generation Hydrogen Evolution Electrocatalyst
ACS APPLIED ENERGY MATERIALS(2019)
摘要
Rational design of composite hybrid structures tuned in atomic level interaction can circumvent the instability of the water splitting catalysts. Here, low-temperature aqueous phase synthesis of a hybrid hydrogen evolution electrocatalyst made of a few nanometer Pt clusters anchored on Co3O4 nanosheets with remarkable stability and superiority over the state-of-the-art Pt/C is achieved. Manipulation of cluster binding energy to support material gives rise to superior activity (3.8 times) and extraordinarily enhanced durability. Pt/Co3O4 composite achieved current densities of 10 and 50 mA/cm(2) at overpotentials as low as of 70 and 170 mV, respectively. A combinatorial approach of theory and experiment opens an avenue to design HER catalyst beyond Pt/C.
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关键词
Hybrid composites,electrocatalysis,water splitting,hydrogen generation,density functional theory
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