| 학회 |
한국화학공학회 |
| 학술대회 |
2019년 봄 (04/24 ~ 04/26, 제주국제컨벤션센터) |
| 권호 |
25권 1호, p.518 |
| 발표분야 |
에너지 환경(Energy and Environment) |
| 제목 |
Ni(OH)2-WP hybrid nanorods for active and durable hydrogen evolution reactions in alkaline atmosphere |
| 초록 |
The development of efficient non-noble hydrogen evolution electrocatalysts in alkaline atmosphere is crucial for sustainable, ecofriendly production of H2 via water electrolysis. An alkaline hydrogen evolution reaction (HER) catalyst composed of Ni(OH)2-decorated tungsten phosphide (WP) nanorods on carbon paper was synthesized through thermal evaporation and electrodeposition. This hybrid catalyst displayed outstanding HER activity and required a low overpotential of only 77 mV to obtain a current density of 10 mA/cm2 and a Tafel slope of 71 mV/dec. The hybrid catalyst also showed long-term electrochemical stability, maintaining its activity for 24 h. This improved HER efficiency was attributed to the synergetic effect of WP and Ni(OH)2: Ni(OH)2 effectively lowers the energy barrier during water dissociation and also provides active sites for hydroxyl adsorption, whereas WP adsorbs hydrogen intermediates and efficiently produces H2 gas. This interfacial cooperation offers not only excellent HER catalytic activity but also new strategies for the fabrication of effective non-noble-metal-based electrocatalysts in alkaline media. |
| 저자 |
김도경, 백민기, 용기중
|
| 소속 |
포항공과대 |
| 키워드 |
에너지 환경 |
| E-Mail |
|
| 원문파일 |
초록 보기 |
