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Active Sites Interc...
Active Sites Intercalated Ultrathin Carbon Sheath on Nanowire Arrays as Integrated Core-Shell Architecture : Highly Efficient and Durable Electrocatalysts for Overall Water Splitting
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Hou, Jungang (författare)
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Wu, Yunzhen (författare)
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Cao, Shuyan (författare)
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Sun, Yiqing (författare)
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- Sun, Licheng, 1962- (författare)
- KTH,Organisk kemi,Zhejiang-KTH Joint Research Center of Photonics, JORCEP
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(creator_code:org_t)
- 2017-10-11
- 2017
- Engelska.
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Ingår i: Small. - : Wiley-VCH Verlagsgesellschaft. - 1613-6810 .- 1613-6829. ; 13:46
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The development of active bifunctional electrocatalysts with low cost and earth-abundance toward oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) remains a great challenge for overall water splitting. Herein, metallic Ni4Mo nanoalloys are firstly implanted on the surface of NiMoOx nanowires array (NiMo/NiMoOx) as metal/metal oxides hybrid. Inspired by the superiority of carbon conductivity, an ultrathin nitrogen-doped carbon sheath intercalated NiMo/NiMoOx (NC/NiMo/NiMoOx) nanowires as integrated core-shell architecture are constructed. The integrated NC/NiMo/NiMoOx array exhibits an overpotential of 29 mV at 10 mA cm(-2) and a low Tafel slope of 46 mV dec(-1) for HER due to the abundant active sites, fast electron transport, low charge-transfer resistance, unique architectural structure and synergistic effect of carbon sheath, nanoalloys, and oxides. Moreover, as OER catalysts, the NC/NiMo/NiMoOx hybrids require an overpotential of 284 mV at 10 mA cm(-2). More importantly, the NC/NiMo/NiMoOx array as a highly active and stable electrocatalyst approaches approximate to 10 mA cm(-2) at a voltage of 1.57 V, opening an avenue to the rational design and fabrication of the promising electrode materials with architecture structures toward the electrochemical energy storage and conversion.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- core-shell architecture
- electrocatalysts
- fast electron transfer
- overall water splitting
- ultrathin carbon sheath
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- art (ämneskategori)
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