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首页> 外文期刊>Catalysis science & technology >Interface engineering of oxygen-vacancy-rich NiCo2O4/NiCoP heterostructure as an efficient bifunctional electrocatalyst for overall water splitting
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Interface engineering of oxygen-vacancy-rich NiCo2O4/NiCoP heterostructure as an efficient bifunctional electrocatalyst for overall water splitting

机译：接口工程oxygen-vacancy-richNiCo2O4 / NiCoP异质结构作为一种有效的双官能electrocatalyst整体水分裂

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摘要

Inexpensive bifunctional electrocatalysts towards oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is highly desirable from the perspective of energy conversion. Herein, we report a novel and high-efficiency bifunctional electrocatalystviainterface engineering within the NiCo2O4/NiCoP heterostructure. Such an interface-modulated strategy can significantly facilitate the generation of rich oxygen vacancies and enrich the active sites at the boundary of the prepared NiCo2O4/NiCoP heterostructure, leading to favorable electronic structure and fast charge-transfer capacity. For the OER, the NiCo2O4/NiCoP heterostructure exhibits an extremely low overpotential of about 295 mV at 10 mA cm(-2), which is much better than that of pristine counterparts. Impressively, a low overpotential of about 198 mV at 10 mA cm(-2)can meet the requirement for HER for this heterostructure in alkaline media. Furthermore, overall water-splitting can be realized through the functioning of the NiCo2O4/NiCoP heterostructure as the cathode and anode simultaneously with a cell voltage of only 1.66 V to achieve 10 mA cm(-2). This work provides a promising interface-regulated strategy to realize the transition metal heterostructure as an efficient electrocatalyst in energy-related applications.
机译：便宜的双官能electrocatalysts向氢和氧进化反应(OER)进化反应(她的)是非常可取的能量转换的角度。报告一种新型,高效双官能electrocatalystviainterface工程内NiCo2O4 / NiCoP异质结构。interface-modulated策略可以显著促进产生丰富的氧气空缺职位和丰富的活跃的网站NiCo2O4 / NiCoP边界的准备异质结构,导致良好的电子结构和电荷转移能力。OER, NiCo2O4 / NiCoP异质结构展品极低的过电压(2)马295 mV在10厘米,比原始的同行。过电压低大约198 mV 10马厘米(2)能满足她的要求异质结构在碱性介质。可以通过整体水分解NiCo2O4 / NiCoP的功能异质结构的阴极和阳极同时只有1.66 V的电池电压马达到10厘米(2)。承诺interface-regulated策略来实现过渡金属异质结构的高效electrocatalyst能源相关应用程序。

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