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Facile solvothermal synthesis of Pt₇₆Co₂₄ nanomyriapods for efficient electrocatalysis

Author:
Jiang, Liu-Ying, Huang, Xian-Yan, Wang, Ai-Jun, Li, Xin-Sheng, Yuan, Junhua, Feng, Jiu-Ju
Source:
Journal of materials chemistry A 2017 v.5 no.21 pp. 10554-10560
ISSN:
2050-7496
Subject:
active sites, catalysts, catalytic activity, durability, electrochemistry, energy, glutamic acid, hydrogen production, nanoparticles, quaternary ammonium compounds, reducing agents, surface area
Abstract:
Despite increasing research studies in the past few decades, it is still a challenge to find highly efficient catalysts for oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER). Herein, a one-pot solvothermal method was developed for constructing Pt₇₆Co₂₄ nanomyriapods (NMs) with abundant active sites, where l-glutamic acid and cetyltrimethylammonium chloride (CTAC) were used as the green reductant and structure directing agent, respectively. The architecture had a larger electrochemically active surface area (ECSA) of 24.49 m² g⁻¹ than Pt₄₉Co₅₁ nanoparticles (NPs, 15.17 m² g⁻¹), Pt₈₀Co₂₀ NPs (16.71 m² g⁻¹) and commercial Pt black (20.35 m² g⁻¹), and exhibited superior catalytic performances for ORR and HER. The mass activity of Pt₇₆Co₂₄ NMs (105.26 mA mgPₜ⁻¹) for ORR was twice as high as Pt black (47.35 mA mgPₜ⁻¹). And the Pt₇₆Co₂₄ NM catalyst exhibited better durability in acid media relative to Pt black and/or Pt/C (20 wt%). This work would have practical applications in catalysis, and energy storage and conversion.
Agid:
6425382