Nitrogen-doped Nanoporous Carbon Membranes Functionalized with Co/CoP Janus-type nanocrystals as Hydrogen Evolution Electrode in Both Acid and Alkaline Environment
| Autor: | Wang, Hong, Min, Shixiong, Wang, Qiang, Li, Debao, Casillas, Gilberto, Ma, Chun, Li, Yangyang, Li, Zhixiong, Li, Lain-Jong, Yuan, Jiayin, Antonietti, Markus, Wu, Tom |
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| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | ACS Nano, 2017, 11 (4), 4358 to 4364 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1021/acsnano.7b01946 |
| Popis: | Self-supported electrocatalysts being generated and employed directly as electrode for energy conversion has been intensively pursued in the fields of materials chemistry and energy. Herein, we report a synthetic strategy to prepare freestanding hierarchically structured, nitrogen-doped nanoporous graphitic carbon membranes functionalized with Janus-type Co/CoP nanocrystals (termed as HNDCM-Co/CoP), which were successfully applied as a highly-efficient, binder-free electrode in hydrogen evolution reaction (HER). Benefited from multiple structural merits, such as high degree of graphitization, three-dimensionally interconnected micro-/meso-/macropores, uniform nitrogen-doping, well-dispersed Co/CoP nanocrystals as well as the confinement effect of the thin carbon layer on the nanocrystals, HNDCM-Co/CoP exhibited superior electrocatalytic activity and long-term operation stability for HER under both acid and alkaline conditions. As a proof-of-concept of practical usage, a macroscopic piece of HNDCM-Co/CoP of 5.6 cm x 4 cm x 60 um in size was prepared in our laboratory. Driven by a solar cell, electroreduction of water in alkaline condition (pH 14) was performed, and H2 has been produced at a rate of 16 ml/min, demonstrating its potential as real-life energy conversion systems. Comment: 31 pages, 15 pages |
| Databáze: | arXiv |
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