Carbon Nanotubes Decorated with CoP Nanocrystals: A Highly Active Non‐Noble‐Metal Nanohybrid Electrocatalyst for Hydrogen Evolution |
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| Authors: | Qian Liu Dr. Jingqi Tian Wei Cui Dr. Ping Jiang Ningyan Cheng Prof. Abdullah M. Asiri Prof. Xuping Sun |
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| Affiliation: | 1. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Changchun 130022, Jilin (China);2. Graduate School of the Chinese Academy of Sciences, Beijing 100039 (China);3. Chemistry Department & Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah 21589 (Saudi Arabia) |
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| Abstract: | ![]()
The development of effective and inexpensive hydrogen evolution reaction (HER) electrocatalysts for future renewable energy systems is highly desired. The strongly acidic conditions in proton exchange membranes create a need for acid‐stable HER catalysts. A nanohybrid that consists of carbon nanotubes decorated with CoP nanocrystals (CoP/CNT) was prepared by the low‐temperature phosphidation of a Co3O4/CNT precursor. As a novel non‐noble‐metal HER catalyst operating in acidic electrolytes, the nanohybrid exhibits an onset overpotential of as low as 40 mV, a Tafel slope of 54 mV dec?1, an exchange current density of 0.13 mA cm?2, and a Faradaic efficiency of nearly 100 %. This catalyst maintains its catalytic activity for at least 18 hours and only requires overpotentials of 70 and 122 mV to attain current densities of 2 and 10 mA cm?2, respectively. |
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| Keywords: | carbon nanotubes cobalt nanocrystals electrolysis heterogeneous catalysis hydrogen evolution reaction |
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