期刊
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
卷 12, 期 3, 页码 473-480出版社
SPRINGER
DOI: 10.1007/s11705-018-1724-9
关键词
NiCo alloy; polypyrrole; hybrid nanotube; electrocatalyst; hydrogen evolution reaction
资金
- National Natural Science Foundation of China [91645104]
- National Basic Research Program of China [2015CB-932304, 2016YFA0202603]
- Natural Science Foundation of Guangdong Province [S2013020012833, 2016A010104004]
- Fundamental Research Fund for the Central Universities [16lgjc67]
The polypyrrole(PPy)@NiCo hybrid nanotube arrays have been successfully fabricated as a high performance electrocatalyst for hydrogen evolution reaction (HER) in alkaline solution. The strong electronic interactions between PPy and NiCo alloy are confirmed by X-ray photoelectron spectroscopy and Raman spectra. Because these interations can remarkably reduce the apparent activation energy (E-a) for HER and enhance the turnover frequency of catalysts, the electrocatalytic performance of PPy@NiCo hybrid nanotube arrays are significantly improved. The electrochemical tests show that the PPy@NiCo hybrid catalysts exhibit a low overpotential of similar to 186 mV at 10.0 mAcm(-2) and a small tafel slope of 88.6 mVdeg(-1) for HER in the alkaline solution. The PPy@NiCo hybrid nanotubes also exhibit high catalytic activity and high stability for HER.y
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