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Self-assembled Co0.85Se/carbon nanowires as a highly effective and stable electrocatalyst for the hydrogen evolution reaction.


ABSTRACT: Self-assembled Co0.85Se/carbon nanowires, constructed by Co0.85Se nanoparticles homogenously embedded into carbon nanowires (Co0.85Se@CNWs), have been synthesized through a facile solvothermal reaction and selenylation process. Compared to the bare Co0.85Se NWs, the Co0.85Se@CNW hybrid demonstrates high efficiency and stability for HER. It has a small Tafel slope of 43.4 mV dec-1, a low onset potential of 138 mV vs. RHE, and a high cycling stability with more than 95% current retention after 1500 voltammetry cycles. The outstanding HER performance of Co0.85Se@CNWs is attributed to its unique particle-in-nanowire architecture, which not only prevents the Co0.85Se nanoparticles from aggregation, but also provides a highly conductive CNW matrix to promote the charge transfer in the electrocatalytic reaction, further enhancing the catalytic activity. This work provides a new strategy to rationally design transition metal-based selenide hybrids as highly effective and stable electrocatalysts for HER.

SUBMITTER: Sun B 

PROVIDER: S-EPMC9064657 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature

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Self-assembled Co<sub>0.85</sub>Se/carbon nanowires as a highly effective and stable electrocatalyst for the hydrogen evolution reaction.

Sun Baochen B   Wang Xinqiang X   Yang Dongxu D   Chen Yuanfu Y  

RSC advances 20190501 30


Self-assembled Co<sub>0.85</sub>Se/carbon nanowires, constructed by Co<sub>0.85</sub>Se nanoparticles homogenously embedded into carbon nanowires (Co<sub>0.85</sub>Se@CNWs), have been synthesized through a facile solvothermal reaction and selenylation process. Compared to the bare Co<sub>0.85</sub>Se NWs, the Co<sub>0.85</sub>Se@CNW hybrid demonstrates high efficiency and stability for HER. It has a small Tafel slope of 43.4 mV dec<sup>-1</sup>, a low onset potential of 138 mV <i>vs.</i> RHE, an  ...[more]

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