期刊
SUSTAINABLE ENERGY & FUELS
卷 4, 期 4, 页码 1723-1729出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9se00607a
关键词
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资金
- National Natural Science Foundation of China [51672144, 51572137, 51702181]
- Natural Science Foundation of Shandong Province [ZR2017BB013, ZR2019BEM042]
- Higher Educational Science and Technology Program of Shandong Province [J17KA014, J18KA001, J18KA033]
- Taishan Scholars Program of Shandong Province [ts201511034]
- Overseas Taishan Scholars Program
Earth-abundant catalysts based on transition metal phosphides (TMPs) such as CoxP have recently gained a lot of attention in the field of electrocatalysis and are usually acquired by chemical synthesis. Herein, we present a mechanical synthesis method (high energy ball milling) for preparing a bifunctional CoxP electrocatalyst at room temperature (25 degrees C) using black phosphorus (BP) and cobalt(iii) oxide (Co2O3) as raw materials. This safe, energy-efficient and scalable method yields a durable catalyst material, which achieves a current density of 10 mA cm(-2) at low overpotentials of 69 mV and 266 mV in 1 M KOH for the HER and OER, respectively, as well as low Tafel-slopes of 50.6 mV dec(-1) and 62.1 mV dec(-1). When the CoxP electrocatalyst was employed for overall water splitting, current densities of 10 mA cm(-2) and 100 mA cm(-2) were achieved at 1.59 V and 1.97 V surpassing those of the state-of-the-art Pt/CRuO2 setup. Moreover, the outlined synthesis route could potentially be applied to other transition metals allowing for the facile production of other catalysts.
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