| 학회 |
한국화학공학회 |
| 학술대회 |
2018년 가을 (10/24 ~ 10/26, 대구 EXCO) |
| 권호 |
24권 2호, p.1860 |
| 발표분야 |
재료(Materials) |
| 제목 |
Ni(OH)2-WP hybrid nanorod arrays for highly efficient hydrogen evolution reactions in alkaline media |
| 초록 |
Developing efficient non-noble hydrogen evolution electrocatalysts in alkaline media is crucial for sustainable, ecofriendly production of H2 through water electrolysis. Herein, we report novel alkaline HER catalyst of Ni(OH)2-decorated WP nanorod arrays on carbon paper synthesized by thermal evaporation and electrodeposition. This hybrid catalyst displays outstanding HER activity and requires a low overpotential of only 77 mV to obtain a current density of 10 mA/cm2 and Tafel slope of 71 mV/dec. The hybrid catalyst also shows long-term electrochemical stability, maintaining its activity for 18 h. This superior HER performance is attributed to the synergetic effect of Ni(OH)2, which reduces the energy barrier of the water dissociation step and provides active sites for hydroxyl adsorption, and WP, which adsorbs hydrogen intermediates and produces H2 gas. This interfacial cooperation offers not only excellent HER catalytic activity but also new strategies for fabricating non-noble, effective electrocatalysts in alkaline media. |
| 저자 |
김도경, Zhuo Zhang, 백민기, 이민석, 문현식, 용기중
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| 소속 |
포항공과대 |
| 키워드 |
화공소재 전반 |
| E-Mail |
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| 원문파일 |
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