张宁
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祝贺课题组与安徽师范大学房彩虹教授合作,在《Applied Catalysis B: Environment and Energy》上发表有关异质肖特基结构材料用于全解水的研究论文!
Title: Built-in Electric Field Governed Electronic Manipulation in Schottky Heterostructures toward Efficient Water Electrolysis
Abstract: Green hydrogen manufacturing from water electrolysis is a promising strategy towards developing the sustainable world, in which the exploration of effective and non-precious electrocatalyst advances is particularly desirable. Here, we demonstrated the subtle interfacial engineering for electronic manipulation to one-pot construct the strongly coupled CoNi alloy-Co3O4 Schottky heterostructures decorated on porous carbon paper (CoNi-Co3O4/PCP), serving as the effective bifunctional electrocatalysts for overall water splitting. The CoNi-Co3O4/PCP nanostructure affords the remarkable electrochemical activity with low overpotentials of 35/189 mV at current density of 10 mA cm−2 for hydrogen/oxygen evolution reactions, respectively, together with excellent durability for over 300 hours. Mechanistic studies unveil the activity origin that the interfacial built-in electric field renders robust electron transfer from CoNi to Co3O4 nanoclusters, which thereby governs the electronic states and the chemical affinities of catalytic sites to balance the binding strength of reaction intermediates. Overall water splitting using CoNi-Co3O4/PCP as bifunctional electrode only requires low cell voltage of 1.38/1.54 V at 10/100 mA cm−2. Furthermore, a tandem photovoltaic-driven electrochemical cell apparatus is assembled to produce the stoichiometric H2 with the rate of 417.4 L h−1 m−2, underscoring its great potential for practical application of direct solar-to-hydrogen energy conversion.
