Journal
CHEMICAL ENGINEERING JOURNAL
Volume 419, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.129977
Keywords
Core-shell nanotube; Metal-organic framework; Carbon nanocomposite; Bifunctional electrocatalyst
Categories
Funding
- NSAF Joint Fund [U1930112]
- Anhui Provincial Natural Science Foundation [1908085ME155]
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Developing high-performance non-noble electrocatalysts for OER and HER is crucial. The constructed 1D bifunctional electrocatalyst showed superior electrocatalytic activity in 1 M KOH and achieved high overall water splitting performance with ultralow cell voltage, demonstrating ultra-stability for overall water splitting.
Developing high-performance non-noble electrocatalysts for oxygen and hydrogen evolution reactions (OER and HER) is of great importance. Herein, an efficient 1D bifunctional electrocatalyst was constructed via a multistep strategy, which consisted of core-shell ZIF-8@ZIF-67 derived CoP/N-doped porous carbon nanotube anchored with vertically aligned MoS2 nanosheets (NCT@CoP@MoS2). Benefiting from the synergies between the unique 1D porous hollow hetemstmcture and the components, the tubular NCT@CoP@MoS2 composites showed superior electrocatalytic activity in 1 M KOH with an overpotential of similar to 234 and 195 mV to achieve 10 mA.cm(-2) for OER and HER, respectively. More importantly, the NCT@CoP@MoS2//NCT@CoP@MoS2 couple delivered high overall water splitting performance with an ultralow cell voltage of 1.57 and 1.85 V to achieve 10 and 200 mA.cm(-2) , only 70 and 40 mV higher than that of Pt/C//RuO2, respectively. Specifically, the as-prepared electrode exhibited ultra-stability for overall water splitting, and the current density only decreases by 4% at 1.6 V after 40 h of cycling.
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