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. 2018 Jun 4;8(36):20341-20346.
doi: 10.1039/c8ra01886c. eCollection 2018 May 30.

Enhanced electrocatalytic hydrogen generation from water via cobalt-doped Cu2ZnSnS4 nanoparticles

Renuka V Digraskar  1 , Vijay S Sapner  1 , Shankar S Narwade  1 , Shivsharan M Mali  1 , Anil V Ghule  2 , Bhaskar R Sathe  1
Affiliations

Enhanced electrocatalytic hydrogen generation from water via cobalt-doped Cu2ZnSnS4 nanoparticles

Renuka V Digraskar et al. RSC Adv. .

Abstract

Herein, we adopted a novel noble metal-free Co-doped CZTS-based electrocatalyst for the hydrogen evolution reaction (HER), which was fabricated using a facile, effective, and scalable strategy by employing a sonochemical method. The optimized Co-doped CZTS electrocatalyst shows a superior HER performance with a small overpotential of 200 and 298 mV at 2 and 10 mA-1, respectively, and Tafel slope of 73 mV dec-1, and also exhibits excellent stability up to 700 cycles with negligible loss of the cathodic current. The ease of synthesis and high activity of the Co-doped CZTS-based cost-effective catalytic system appear to be promising for HER catalysis.

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Conflict of interest statement

There are no conflicts to declare.

Figures

Scheme 1
Scheme 1. Schematic illustration of the synthetic process for the Co-doped CZTS NPs.
Fig. 1
Fig. 1. Superimposed (a) FTIR, (b) XRD and (c) Raman spectra and (d) BET curves of CZTS (I) and Co-doped CZTS (II).
Fig. 2
Fig. 2. HRTEM image of (a) pure CZTS NPs (2.6 ± 0.1 nm) and (b) Co-doped CZTS NPs (2.4 ± 0.1 nm) (inset shows the particle size distribution plots). Fast-Fourier transform (FFT) patterns of (c) pure CZTS NPs and (d) Co-doped CZTS NPs (inset shows the lattice fringes).
Fig. 3
Fig. 3. (a) Polarization curves, (b) corresponding Tafel plots and (c) Nyquist plots of the CZTS and Co-doped CZTS NPs. (d) Durability test of Co-CZTS in 0.5 M H2SO4.
See this image and copyright information in PMC

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