Significant enhancement of the performance of hydrogen evolution reaction through shape-controlled synthesis of hierarchical dendrite-like platinum. Issue 17 (19th April 2018)

• Record Type: Journal Article
• Authors: Lin, Liu; Sun, Zemin; Yuan, Mengwei; He, Jinlu; Long, Run; Li, Huifeng; Nan, Caiyun; Sun, Genban; Ma, Shulan
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 17(2018)
• Page Start: 8068
• Page End: 8077
• Publication Date: 2018-04-19
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c8ta00993g
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Hierarchically structured Pt micro-pine dendrites were prepared via a one-step solvothermal method, which exhibited excellent catalytic activity and significantly enhanced stability in comparison with the commercial Pt/C. Abstract : Herein, hierarchical dendrite-like Pt crystals with a distinct morphology were synthesized via a facile one-pot method without any templates. Formation of this hierarchical structure is dependent on the reaction duration. Interestingly, different hierarchical structures show different catalytic activities. After a 12 hour reaction, tertiary structures of Pt are formed, which can act as outstanding catalysts in the hydrogen evolution reaction (HER). The onset potential of this dendrite-like Pt catalyst for the HER in a 0.5 M H2 SO4 solution is 15 mV, which outperforms that of commercial Pt/C (30 mV). Moreover, it shows significantly improved stability for HER as the polarization curve after 10 000 cycles retains a similar performance as in the initial test; this results in a loss of only 2.6% of its initial current density at an overpotential of 0.05 V. The distinct hierarchical dendrite-like structures are maintained after cycling and current–time tests, which can be responsible for the excellent performance of this catalyst.