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3D Melamine Sponge-...
3D Melamine Sponge-Derived Cobalt Nanoparticle-Embedded N-Doped Carbon Nanocages as Efficient Electrocatalysts for the Oxygen Reduction Reaction
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Zhang, Hua (författare)
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Zhou, Yao (författare)
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Chen, Ji (författare)
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Wang, Ziqiu (författare)
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Ni, Zitao (författare)
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Wei, Qianwen (författare)
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Chen, Anran (författare)
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Li, Meng (författare)
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Sun, Tao (författare)
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Jin, Zhang (författare)
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- Wågberg, Thomas, 1971- (författare)
- Umeå universitet,Institutionen för fysik
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Hu, Guangzhi (författare)
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Li, Xifei (författare)
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(creator_code:org_t)
- 2021-07-27
- 2021
- Engelska.
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Ingår i: ACS Omega. - : American Chemical Society (ACS). - 2470-1343. ; 6:31, s. 20130-20138
- Relaterad länk:
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https://doi.org/10.1...
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https://umu.diva-por... (primary) (Raw object)
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https://pubs.acs.org...
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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 large-scale and controllable synthesis of novel N-doped three-dimensional (3D) carbon nanocage-decorated carbon skeleton sponges (Co-NCMS) is introduced. These Co-NCMS were highly active and durable non-noble metal catalysts for the oxygen reduction reaction (ORR). This hybrid electrocatalyst showed high ORR activity with a diffusion-limiting current of 5.237 mA·cm-2 in 0.1 M KOH solution through the highly efficient 4e- pathway, which was superior to that of the Pt/C catalyst (4.99 mA·cm-2), and the ORR Tafel slope is ca. 67.7 mV·dec-1 at a high potential region, close to that of Pt/C. Furthermore, Co-NCMS exhibited good ORR activity in acidic media with an onset potential comparable to that of the Pt/C catalyst. Most importantly, the prepared catalyst showed much higher stability and better methanol tolerance in both alkaline and acidic solutions. The power density obtained in a proton exchange membrane fuel cell was as high as 0.37 W·cm-2 at 0.19 V compared with 0.45 W·cm-2 at 0.56 V for the Pt/C catalyst. In Co-NCMS, the N-doped carbon nanocages facilitated the diffusion of the reactant, maximizing the exposure of active sites on the surface and protecting the active metallic core from oxidation. This made Co-NCMS one of the best non-noble metal catalysts and potentially offers an alternative approach for the efficient utilization of active transition metals in electrocatalyst applications.
Ämnesord
- NATURVETENSKAP -- Kemi -- Organisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Organic Chemistry (hsv//eng)
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Zhang, Hua
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Zhou, Yao
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Chen, Ji
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Wang, Ziqiu
-
Ni, Zitao
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Wei, Qianwen
-
visa fler...
-
Chen, Anran
-
Li, Meng
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Sun, Tao
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Jin, Zhang
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Wågberg, Thomas, ...
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Hu, Guangzhi
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Li, Xifei
-
visa färre...
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Umeå universitet